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DevicesEther ValvesLubricatorsSilencersStartersValvesY-StrainersBelts, Pulleys, & Vibration DampersBelts, Pulleys, & Vibration DampersEngine BeltsEngine PulleysEngine Vibration DampersOther Belts, Pulleys, & Vibrational DampersCooling SystemCooling SystemAftercoolers & ComponentsCooling FabricationsCooling ModulesFans & ComponentsHeat ExchangersOil CoolersOther Cooling System ComponentsRadiator & ComponentsTanks & ComponentsThermostatsWater Pumps & ComponentsEngine ComponentsEngine ComponentsAir Compressors & ComponentsCamshaft KitsCamshaftsCylinder Heads & ComponentsEngine BearingsEngine CoversEngine Mounts & SupportsEngine Rotating ComponentsPistons & Other Piston ComponentsEngine Filters & FluidsEngine Filters & FluidsEngine FiltersEngine FluidsEngine Repair & Service KitsEngine Overhaul KitsEngine Overhaul KitsOn-HighwayEngine TransmissionEngines & BlocksEngines & BlocksBare BlocksCylinder Block ComponentsCylinder BlocksEnginesLong BlocksOther Engine ArrangementsShort BlocksExhaust 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RetainersGround Engaging Tool WashersRock DeflectorsGround Engaging Tool Service Tools & GaugesGround Engaging Tool Service Tools & GaugesGround Engaging Tool GaugesGround Engaging Tool Service ToolsOther Ground Engaging ToolsOther Ground Engaging ToolsMulcher TeethWire RopePaving Ground Engaging ToolsPaving Ground Engaging ToolsPaving Cutting BitsPaving Screed PlatesRipper & Scarifier Ground Engaging ToolsRipper & Scarifier Ground Engaging ToolsRipper Shank ProtectorsRipper Shank Repair NosesRipper ShanksRipper TeethScarifier ShanksScarifier TeethRock Drill Ground Engaging ToolsRock Drill Ground Engaging ToolsDown-The-Hole Hammer AdaptersDown-The-Hole Hammer AssembliesDown-The-Hole Hammer BitsTricone Drill BitsTricone Drill NozzlesScraper Ground Engaging ToolsScraper Ground Engaging ToolsScraper Cutting EdgesScraper Elevator & Ejector PartsScraper Router BitsSide Cutters & Sidebar ProtectionSide Cutters & Sidebar ProtectionSide CuttersSidebar Protector Shear BlocksSidebar ProtectorsWing ShroudsWear PlatesWear PlatesBack Drag BarsBase Edge Wear PlatesBucket Rear Wear PlatesHeel PlatesLiner Wear PlatesSidebar Wear PlatesSki PlatesSole PlatesWear ProtectionWear ProtectionBase Edge End ProtectorsBolt SaversChocky BarsHeel ShroudsMechanically Attached Wear Plate System (MAWPS)Roll BarsWear BarsWear BlocksWear ButtonsWear LugsHardware, Seals, & ConsumablesHardware, Seals, & ConsumablesBars, Plates, & Angle BracketsBars, Plates, & Angle BracketsAngle BracketsFlat Common Shape PlatesIrregular PlatesOther Bar, Plates, & Angle BracketsSquare, Hex, & Round BarsBearings & BushingsBearings & BushingsCapsLeg PocketsOther Bearings & BushingsRetainersRing HalfRolling ElementsSleevesSpherical PlainsTrunnionsBelts & PulleysBelts & PulleysBeltsPulleysChannels & TubesChannels & TubesStandard ChannelsStructural TubesU-ChannelsFoam, Insulation, & LinersFoam, Insulation, & LinersCab InsulationHeat ShieldsInsulation Groups & AssembliesIrregularRoundSquare RectangleTrianglesTubular Exhaust SleevesHandles, Latches, & Hand LeversHandles, Latches, & Hand LeversCab Door HandlesCab Grab HandlesCab Hand LeversCab LatchesHardwareHardwareBumpersClampsFastenersGrommetsHingesIsolation MountsKeysLifting ComponentsLink Brackets & ComponentsOther HardwarePinsRetaining/Snap RingsRod Ends & Control RodsSpherical BallsSpringsWashers & SpacersWire Ropes, Cables, & ChainsHardware KitsHoses & TubesInformation, Messages, & MarkingsInformation, Messages, & MarkingsFilmsOther Identification ComponentsPlatesTagsLinkage Pins & Sleeve BearingsLinkage Pins & Sleeve BearingsFlag Pin Assemblies & ComponentsHeaded PinsKeeper Bar Pins & ComponentsLinkage PinsMultiple OD PinsOther Linkage Pins & Sleeve BearingsOther Pins & Pin AssemblyPlain PinsRetaining Ring PinsSleeve BearingsTapered Fit PinsO-Ring KitsSeals, Gaskets, & O-RingsSeals, Gaskets, & O-RingsBackup RingsBulk SealsD-RingsGasketsKitsLoose Lip PistonsMetal RingsO-RingsOther SealsPress-In-PlaceQuad 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StructuresFire Suppression System & ComponentsFire Suppression System & ComponentsActuatorsControllers & ModulesExtinguishersNozzlesGrease Lubrication SystemsGrease Lubrication SystemsGrease ZerksLube Valves & InjectorsLubrication PumpsGuard Assembly StructuresHeavy Frame & Body FabricationsHeavy Frame & Body FabricationsCompactor WheelsCounterweight & BallastsExternal ROPSGrab, Lift, & Push StructuresMachine FrameOther Heavy FabricationsPayload Carrying StructureTrack FramesTruck Bodies & LinersLight Frame & Body FabricationsLight Frame & Body FabricationsEnclosures & DoorsGrates, Grills, & ScreensHandrailsLaddersLevers & LinksOther Light FabricationsStairwaysStepsTrack FendersTread PlatesWalkways & PlatformsWheel FendersOther Covers & SupportsOther Covers & SupportsCustom SupportsCustom Tubular SupportsMetallic CoversNon-Metallic Covers & SupportsScraper Elevator & Ejector SystemsTanks & ComponentsTanks & ComponentsAir TanksDEF TanksFuel TanksGaugesOther Tank ComponentsPressure CapsWashdown TanksWasher Fluid TanksUndercarriageUndercarriageBogiesBogiesBogiesPin Assembly and CartridgesGuardsRolling ComponentsRolling ComponentsBottom RollersCarrier Roller GroupsCarrier Roller Rim AssembliesCast and Forged IdlersCollarsFabricated Idler ComponentsFront Idler GroupsIdler AssembliesIdler GroupsMiscellaneous Rolling ComponentsMounting Caps, Blocks, and Bearing MountsRimsShaftsSlidersSprockets and SegmentsTrack Roller GroupsTrack Roller Rim AssembliesRubber Track Undercarriage ComponentsRubber Track Undercarriage ComponentsIdlersMiscellaneous ComponentsMulti Terrain LoaderRollersSprocketsRubber TracksSealsSealsBackup Rings and Rectangular SealsDuo Cone GroupsO-RingsRingsToric RingsStructuresStructuresFrame AssembliesPlates and BracketsTrack AdjustmentTrack AdjustmentEqualizer PartsRecoil Groups and PartsTrack Tensioner and Adjuster ComponentsTrack ComponentsTrack ComponentsBearing SleevesCartridge AssemblyInsertsLink AssembliesMiscellaneous Track ComponentsTrack Group 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PartsAttachmentsAttachmentsAdaptersAugersBackhoesBale GrabsBale SpearsBladesBroomsBrushcuttersBuckets - BackhoeBuckets - Compact Wheel LoaderBuckets - Medium Wheel LoaderBuckets - Mini Hydraulic Excavator (0 - 10T)Buckets - Skid Steer LoaderBuckets - Small Wheel LoaderCold PlanersCompactorsCouplersFlail MowersForksGrappleHammersHammersHammer BracketsHammer LinesHammer ToolsHammersMaterial Handling ArmsMulchersRakesRippersSawsSmart Grader BladesSnow BlowersSnow PlowsSnow PushesCabsCabsAlarms & HornsAlarms & HornsAlarmsHornsCab AssembliesCab CanopiesCab Displays & GaugesCab Displays & GaugesCab DisplaysCab Gauge ClustersGaugesCab DoorsCab DoorsCab Door AssembliesCab Door HandlesCab Grab HandlesCab Hand LeversCab LatchesCab Entertainment SystemsCab Entertainment SystemsAntennaPower SocketsRadio AccessoriesRadiosSpeakers & GrillsUSB PortsCab HVAC SystemsCab HVAC SystemsCab Accumulators, Receivers, & DryersCab Air Conditioning AssembliesCab Air Conditioning CompressorsCab Air FiltersCab BlowersCab DuctingCab EvaporatorsCab ThermostatsLouversOther Cab HVAC ComponentsCab InteriorCab InteriorCab Dash & TrimsCab Emergency Exit ComponentsCab FloormatsCab InsulationCab Seats & ComponentsCab StorageCab SecurityCab VisibilityCab VisibilityMirrorsOther Visibility ComponentsOther Window & Glass ComponentsShadesVision SystemsVisorsWasher Fluid TanksWindows & GlassWindshield Wipers, Washers, & ComponentsCab Windows & Panel Weatherstrips & SealsCab Windows & Panel Weatherstrips & SealsWeatherstripsWindow & Panel SealsElectric Cab Operator ControlsElectric Cab Operator ControlsCab Buttons & KnobsCab SwitchesCamerasHVACJoystick ComponentsJoysticksKeypadsOther Cab ControlsRotary & Jog Dial ModulesStalksWiper SwitchesMechanical Cab Operator ControlsMechanical Cab Operator ControlsFoot PedalsMechanical Control LeversOther Operator Control ComponentsSteering WheelsOther Cab ComponentsTelematicsDrivetrainDrivetrainAxles & ComponentsAxles & ComponentsAxle ComponentsAxlesBrakes & ComponentsBrakes & ComponentsBrake DrumsBrake HubsBrake LiningsBrake Master CylindersBrake Reservoir TanksBrake Shoe AssembliesBrakesCamshaftsHydraulic Brake ValvesOther Brake ComponentsParking Brake DiscsClutches & ComponentsClutches & ComponentsClutch HousingClutch PlatesClutch-Brake HubClutchesDifferentialsDifferentialsDifferential Bearing KitsDifferential BearingsDifferential CarriersDifferential Case & Housing AssembliesDifferential CasesDifferential Friction DiscsDifferential GearsDifferential GroupsDifferential PlatesDifferential SpidersOther Differential ComponentsDrive Chains & SprocketsDrive Chains & SprocketsDrive ChainsDrive SprocketsDriveshafts & JointsDriveshafts & JointsDriveshaft PlatesDriveshaftsJointsOther Driveshaft & Joint ComponentsDrivetrain Filters & FluidsDrivetrain Filters & FluidsDrivetrain FiltersDrivetrain FluidsDrivetrain Repair & Service KitsDrivetrain Repair & Service KitsDrivetrain & Steering KitsDrivetrain Bearing KitsDrivetrain Gasket KitsFinal DriveFinal DriveFinal Drive Bearing KitsFinal Drive BearingsFinal Drive Damper PlatesFinal Drive Duo Cone SealsFinal Drive GearsFinal Drive PlatesFinal DrivesFriction DiscsOther Final Drive ComponentsGearsGearsOther GearsPlanet GearsPump GearsRing GearsSun GearsOther Drivetrain ComponentsOther Drivetrain ComponentsAdapters & CouplingsDrive GroupsDrivetrain Friction DiscsDrivetrain Pump ValvesDrivetrain Separator PlatesDrivetrain Shafts & Shaft AssembliesDrivetrain Structural ComponentsOther Drivetrain ComponentsSteeringSteeringOther Steering ComponentsSteering Friction DiscsSteering PlatesTires & RimsTires & RimsMounting DiscsMudflapsRim ComponentsRimsTire & Tire ComponentsTorque Converters & ComponentsTorque Converters & ComponentsTorque Converter BearingsTorque Converter ComponentsTorque ConvertersTransmissions & ComponentsTransmissions & ComponentsOther Transmission ComponentsTransmission ArrangementsTransmission Bearing KitsTransmission BearingsTransmission Cases & AssembliesTransmission Friction DiscsTransmission Gasket KitsTransmission GearsTransmission PlatesTransmission RotorWheelsYokes & Yoke AssembliesYokes & Yoke AssembliesYoke AssembliesYokesElectrical & ElectronicsElectrical & ElectronicsAlarms & HornsAlarms & HornsAlarmsHornsBasic ComponentsBasic ComponentsAlternatorsBus BarsCapacitorsCircuit Breakers & FusesCoilsDiodesGeneratorsHeat SinksMotorsRectifiersRegulatorsRelayResistorsSolenoidsStartersTransducersBatteriesBatteriesBattery ComponentsGeneral DutyHeavy DutyOther BatteriesUninterruptible Power SupplyCab Displays & GaugesCab Displays & GaugesCab DisplaysCab Gauge ClustersCab GaugesCab Entertainment SystemsCab Entertainment SystemsAntennaPower SocketRadio AccessoriesRadiosSpeaker & GrillUSB PortCondition MonitoringElectric BoxesElectrical & Electronics Repair & Service KitsElectrical Operator ControlsElectrical Operator ControlsCab Buttons & KnobsCab SwitchesCamerasHVACJoystick ComponentsJoysticksKeypadsOther Cab ControlsRotary & Jog Dial ModulesStalksTransmission Hoist LeversWiper SwitchesHeatersLights & Light AccessoriesLights & Light AccessoriesLight AccessoriesLightsOther Electrical & Electronics ComponentsPowerPowerAlternatorsBatteriesGeneratorsMemory Cards & HDsMotorsOther Power Converter ComponentsPower ControlsPower InvertersSoftwareStartersTransformersRadios & Radio AccessoriesRadios & Radio AccessoriesRadio AccessoriesRadiosSensors & SwitchesSensors & SwitchesAdvanced SensorsEmission SensorsLidarLiquid Level SensorsOther Sensors & SwitchesPosition SensorsPressure SensorsPressure SwitchesRadarSensor & Switch ComponentsSpeed & Timing SensorsTelematicsTemperature SensorsTemperature SwitchesTelematicsTerminal BlocksVision SystemsWiring Harnesses & CablesWiring Harnesses & CablesBulk MaterialsCable AssembliesConduitsConnectorsHarness AssembliesOther Connectors & TerminalsOther Wiring Harnesses & CablesTerminalsWiring GroupsEngineEngineAir & Hydraulic Starting SystemsAir & Hydraulic Starting SystemsBarring DevicesEther ValvesLubricatorsSilencersStartersValvesY-StrainersBelts, Pulleys, & Vibration DampersBelts, Pulleys, & Vibration DampersEngine BeltsEngine PulleysEngine Vibration DampersOther Belts, Pulleys, & Vibrational DampersCooling SystemCooling SystemAftercoolers & ComponentsCooling FabricationsCooling ModulesFans & ComponentsHeat ExchangersOil CoolersOther Cooling System ComponentsRadiator & ComponentsTanks & ComponentsThermostatsWater Pumps & ComponentsEngine ComponentsEngine ComponentsAir Compressors & ComponentsCamshaft KitsCamshaftsCylinder Heads & ComponentsEngine BearingsEngine CoversEngine Mounts & SupportsEngine Rotating ComponentsPistons & Other Piston ComponentsEngine Filters & FluidsEngine Filters & FluidsEngine FiltersEngine FluidsEngine Repair & Service KitsEngine Overhaul KitsEngine Overhaul KitsOn-HighwayEngine TransmissionEngines & BlocksEngines & BlocksBare BlocksCylinder Block ComponentsCylinder BlocksEnginesLong BlocksOther Engine ArrangementsShort BlocksExhaust SystemExhaust SystemAftertreatment Systems & ComponentsExhaust AirLinesExhaust BellowsExhaust Manifolds & Manifold ComponentsExhaust PipesExhaust TubingExhaust ValvesIntake ComponentsMufflersOther Exhaust System ComponentsWastegateFEAD & Housing SystemsFEAD & Housing SystemsCrankshaft AdaptersFEAD & Fan Drive BracketsFan AdaptersFan Drive GroupsFront & Rear HousingsPump & Auxiliary AdaptersFuel SystemFuel SystemActuatorsCarburetors & GovernorsFuel InjectorsFuel Lines/High Pressure LinesFuel PressureFuel PumpsFuel RailsFuel System ValvesFuel TanksInjector NozzlesOther Fuel System ComponentsSeals for Fuel SystemsIgnition/Electrical SystemIgnition/Electrical SystemAlternatorsIgnitionsOil Mist DetectorsSpark PlugsStartersLubrication SystemLubrication SystemBreathersClosed Crankcase Ventilation (CCV)Disposal & OCV LinesOil FillsOil LinesOil PansOil Pump ComponentsOil PumpsOil Renewal System Valve AssemblyOther Lubrication ComponentsRegulatorsTurbo SystemTurbo SystemDiffusers & NozzlesHousings & CoversOther Turbo ComponentsTurbo CartridgesTurbochargers & Turbocharger GroupsValve TrainValve TrainActuatorsBridgeCamshaft KitsCamshaftsEngine BrakesLifter ShaftOther Valve ComponentsOther Valve Mechanism ComponentsPushrodsRocker ArmsRotocoilsValvesFilters & FluidsFilters & FluidsFiltersFiltersAftertreatment/DEFAir CleanersAir FiltersBreathersCoolant ConditionersEngine Oil Filters & ComponentsFuel Filters & Fuel Water SeparatorsHydraulic & Transmission FiltersLube System FiltersOther Filters & Filter ComponentsScreensFluidsFluidsAftertreatment/Diesel Exhaust Fluid (DEF)CoolantsGreasesOilsGround Engaging ToolsGround Engaging ToolsBlade Cutting Edges & End BitsBlade Cutting Edges & End BitsBlade End BitsBox Blade Cutting EdgesBucket Base Edges & LipsBucket Base Edges & LipsBase Edge AssembliesBase EdgesCast LipsBucket Corners & Corner GuardsBucket Corners & Corner GuardsBucket Corner GuardsBucket CornersBucket Cutting Edges & Edge ProtectionBucket Cutting Edges & Edge 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BackHomeHardware, Seals, & ConsumablesSeals, Gaskets, & O-RingsO-Rings2H-3931: 3.53 x 82.14mm 75A NBR O-Ring
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Hardware, Seals, & ConsumablesSeals, Gaskets, & O-RingsO-Rings
2H-3931: 3.53 x 82.14mm 75A NBR O-Ring
2H-3931: 3.53 x 82.14mm 75A NBR O-Ring
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2H-3931: 3.53 x 82.14mm 75A NBR O-Ring
2H-3931: 3.53 x 82.14mm 75A NBR O-Ring
2H-3931: 3.53 x 82.14mm 75A NBR O-Ring
2H-3931: 3.53 x 82.14mm 75A NBR O-Ring
2H-3931: 3.53 x 82.14mm 75A NBR O-Ring

O-ring

Brand: Cat

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Parts diagram for 2H-3931
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Description for part number 2H-3931

Description:
O-Rings are used in static sealing and some dynamic applications.

Attributes:
Cat® O-Rings are made from materials that are matched to the fluids, temperatures and pressures found in Cat engines and machines. The materials resist wear and extrusion, and provide superior resistance to seal compression set. In addition, certain Cat O-Rings are coated with PTFE to minimize seal twisting and cutting during seal installation.

Dimensions of our O-Rings are consistently held to tight tolerances to ensure they fit properly into seal grooves with the necessary seal compression.

With over 2500 O-Rings in different sizes and materials, Cat O-Rings are your best solution for your Cat and other mobile equipment O-Ring needs.

Cat Sealing systems protect more expensive parts from leaks and contamination. Protect your investment with Genuine Cat Seals.

Applications:
O-Rings are used in many static and dynamic joints throughout Cat machines and engines.

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Warning:This product can expose you to chemicals including 1,3-Butadiene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Specifications for part number 2H-3931

Units of Measure

USMetric

Cross Section Diameter (mm): 3.53

Cross Section Diameter (in): 0.139

Inside Diameter (mm): 82.14

Inside Diameter (in): 3.234

SAE AS568 Dash Size: -236

Material: NBR (75),NBR - Nitrile,Nitrile (NBR),Nitrile / NBR / HNBR / XNBR Rubber

Material Description: Nitrile (NBR) rubber is capable of service temperatures of -40 to 100C and is resistant to fuel oils, gasoline, ultra low sulfur diesel fuel and lubricants. Nitrile rubber is not recommended for applications that require resistance to bio-diesel or coolant.

Notes: Dimensions and material descriptions provided for reference only.

Polymer: NBR (Nitrile butadiene)

Material Hardness: 75A

Dash Size: 236

Seal/O-Ring Type: Standard

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Compatible Models for part number 2H-3931

PUMPER

SCT673 SPS342 SPT342

GENERATOR

SR4

TRUCK ENGINE

C-10 C-12 1673 1674 1676 3408B 1693 3408 3406 3306 1140 1673C 1150 1145 1160 3406C 3406B 3116 3306B

INTEGRATED TOOLCARRIER

IT62H

LOAD HAUL DUMP

R1700 II R1300

MOTOR GRADER

120H 120G 120B 16 120 GC 135H 12H NA 140B 120H ES 140K 140H 140G 140H NA 14M 130G 140 14G 14E 12H 12G 120 160H 160G 12F 12E 160H NA 135H NA 12H ES 120H NA 140H ES

WINCH

528 55

TRACK-TYPE TRACTOR

D6XE D10 D6R II D3B D4G D4H D4D D4E D5B D5H D6C D6D D6E D6H D7F D7G D7H D4 D6 D5 D8K D8L D8N D8H D9E D9G D9T D9R D9H D6 XE D6G2 XL D10R D4E SR D7R II

WHEEL SKIDDER

518 528

ASPHALT PAVER

AP300F AP355F

TRACK FELLER BUNCHER

TK732 1190T

MARINE ENGINE

3516 3512 3508 D379A D379B D399 3408B 3406B D398A D398B 3208 3306B C32 3304 3306 3304B 3412 3408 3406

PIPELAYER

572R II 561D 561C 572F 572G 571F 594

FRONT SHOVEL

235C

EXCAVATOR

350-A 350-A L 225 235 215 235C 245 245B

VIBRATORY COMPACTOR

CS-323C CS-563 CP-563 CP-323C CB-434B CB-534B

RIPPER SCARIFIER

16G

WHEEL TRACTOR

651B 613 627 621 631D 631E 631C 641 651 641B 657 633C 657B 621E 633D 627B 637D 637E

HYDRAULIC CONTROL

41 48 183 173B 163 143 153 141 140

VEHICULAR ENGINE

3516 3512 D346 D348

TRACK LOADER

973 931 941 951C 951B 977D 977H 941B 977K 977L 955K 955L

SOIL COMPACTOR

825G 825C 825B 815

EJECTOR TRUCK

740

BACKHOE LOADER

438D 424D 420D 420E 432D 442D 430D 430E 428D 416D

COLD PLANER

PR-1000 PM822 PM620 PR-1000C PM622

WHEEL DOZER

834 824B 834B 814B 824G 824C 814 824

LANDFILL COMPACTOR

816 826C 826B 816B

COMPACT WHEEL LOADER

910

WHEEL LOADER

960F 980 950B 950E 962H 950F 988 950H 950K 962K 920 988B 930 936 966D 966C 966E 950 930R 930T 950B/950E 936E 980B 980C 980G 994K 950F II

ROAD RECLAIMER

RR-250

SOIL STABILIZER

SS-250

ENGINE - MACHINE

3208

GEN SET ENGINE

3406B 3408B 3408C 3304B 3306 3304 3412 3412C 3508 3408 3512 3516

ARTICULATED TRUCK

D30C D35C D300B D250B D25C D350C 740

RIPPER

8D 977 951 955 10 6 5 4

ENGINE - INDUSTRIAL

3406B

INDUSTRIAL ENGINE

3406C D342 D398B 3304 3306 3412 D333C 3406 3512 3516 3508 D398 D399 D342C D330C D379 D379B

CABLE CONTROL

118 119 129

QUARRY TRUCK

775B 771D 771C

WHEEL SCRAPER

627 621E 657B 623F 623E 637E 637 657

TRUCK

785 789 797 793D 773D 797F 785D 773B 775D 789D 769 773 777 769B 769D 769C

GAS ENGINE

G398 G399 G379A G379

TRACTOR

776 768C 768B 772B

BULLDOZER

824S 8S 10C 5A 5S 6A 6S 10S 10U 8A

TRACK-TYPE LOADER

977K

FELLER BUNCHER

FB518

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DiagramDescriptionSpecificationsCompatible Models
Parts diagram for 2H-3931
View Detailed Parts Diagrams
Add Your Equipment
Description for part number 2H-3931

Description:
O-Rings are used in static sealing and some dynamic applications.

Attributes:
Cat® O-Rings are made from materials that are matched to the fluids, temperatures and pressures found in Cat engines and machines. The materials resist wear and extrusion, and provide superior resistance to seal compression set. In addition, certain Cat O-Rings are coated with PTFE to minimize seal twisting and cutting during seal installation.

Dimensions of our O-Rings are consistently held to tight tolerances to ensure they fit properly into seal grooves with the necessary seal compression.

With over 2500 O-Rings in different sizes and materials, Cat O-Rings are your best solution for your Cat and other mobile equipment O-Ring needs.

Cat Sealing systems protect more expensive parts from leaks and contamination. Protect your investment with Genuine Cat Seals.

Applications:
O-Rings are used in many static and dynamic joints throughout Cat machines and engines.

View More
Warning:This product can expose you to chemicals including 1,3-Butadiene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Specifications for part number 2H-3931

Units of Measure

USMetric

Cross Section Diameter (mm): 3.53

Cross Section Diameter (in): 0.139

Inside Diameter (mm): 82.14

Inside Diameter (in): 3.234

SAE AS568 Dash Size: -236

Material: NBR (75),NBR - Nitrile,Nitrile (NBR),Nitrile / NBR / HNBR / XNBR Rubber

Material Description: Nitrile (NBR) rubber is capable of service temperatures of -40 to 100C and is resistant to fuel oils, gasoline, ultra low sulfur diesel fuel and lubricants. Nitrile rubber is not recommended for applications that require resistance to bio-diesel or coolant.

Notes: Dimensions and material descriptions provided for reference only.

Polymer: NBR (Nitrile butadiene)

Material Hardness: 75A

Dash Size: 236

Seal/O-Ring Type: Standard

View More
Compatible Models for part number 2H-3931

PUMPER

SCT673 SPS342 SPT342

GENERATOR

SR4

TRUCK ENGINE

C-10 C-12 1673 1674 1676 3408B 1693 3408 3406 3306 1140 1673C 1150 1145 1160 3406C 3406B 3116 3306B

INTEGRATED TOOLCARRIER

IT62H

LOAD HAUL DUMP

R1700 II R1300

MOTOR GRADER

120H 120G 120B 16 120 GC 135H 12H NA 140B 120H ES 140K 140H 140G 140H NA 14M 130G 140 14G 14E 12H 12G 120 160H 160G 12F 12E 160H NA 135H NA 12H ES 120H NA 140H ES

WINCH

528 55

TRACK-TYPE TRACTOR

D6XE D10 D6R II D3B D4G D4H D4D D4E D5B D5H D6C D6D D6E D6H D7F D7G D7H D4 D6 D5 D8K D8L D8N D8H D9E D9G D9T D9R D9H D6 XE D6G2 XL D10R D4E SR D7R II

WHEEL SKIDDER

518 528

ASPHALT PAVER

AP300F AP355F

TRACK FELLER BUNCHER

TK732 1190T

MARINE ENGINE

3516 3512 3508 D379A D379B D399 3408B 3406B D398A D398B 3208 3306B C32 3304 3306 3304B 3412 3408 3406

PIPELAYER

572R II 561D 561C 572F 572G 571F 594

FRONT SHOVEL

235C

EXCAVATOR

350-A 350-A L 225 235 215 235C 245 245B

VIBRATORY COMPACTOR

CS-323C CS-563 CP-563 CP-323C CB-434B CB-534B

RIPPER SCARIFIER

16G

WHEEL TRACTOR

651B 613 627 621 631D 631E 631C 641 651 641B 657 633C 657B 621E 633D 627B 637D 637E

HYDRAULIC CONTROL

41 48 183 173B 163 143 153 141 140

VEHICULAR ENGINE

3516 3512 D346 D348

TRACK LOADER

973 931 941 951C 951B 977D 977H 941B 977K 977L 955K 955L

SOIL COMPACTOR

825G 825C 825B 815

EJECTOR TRUCK

740

BACKHOE LOADER

438D 424D 420D 420E 432D 442D 430D 430E 428D 416D

COLD PLANER

PR-1000 PM822 PM620 PR-1000C PM622

WHEEL DOZER

834 824B 834B 814B 824G 824C 814 824

LANDFILL COMPACTOR

816 826C 826B 816B

COMPACT WHEEL LOADER

910

WHEEL LOADER

960F 980 950B 950E 962H 950F 988 950H 950K 962K 920 988B 930 936 966D 966C 966E 950 930R 930T 950B/950E 936E 980B 980C 980G 994K 950F II

ROAD RECLAIMER

RR-250

SOIL STABILIZER

SS-250

ENGINE - MACHINE

3208

GEN SET ENGINE

3406B 3408B 3408C 3304B 3306 3304 3412 3412C 3508 3408 3512 3516

ARTICULATED TRUCK

D30C D35C D300B D250B D25C D350C 740

RIPPER

8D 977 951 955 10 6 5 4

ENGINE - INDUSTRIAL

3406B

INDUSTRIAL ENGINE

3406C D342 D398B 3304 3306 3412 D333C 3406 3512 3516 3508 D398 D399 D342C D330C D379 D379B

CABLE CONTROL

118 119 129

QUARRY TRUCK

775B 771D 771C

WHEEL SCRAPER

627 621E 657B 623F 623E 637E 637 657

TRUCK

785 789 797 793D 773D 797F 785D 773B 775D 789D 769 773 777 769B 769D 769C

GAS ENGINE

G398 G399 G379A G379

TRACTOR

776 768C 768B 772B

BULLDOZER

824S 8S 10C 5A 5S 6A 6S 10S 10U 8A

TRACK-TYPE LOADER

977K

FELLER BUNCHER

FB518

View More
KeyKey
Factory Fit

This part is designed to fit your Cat equipment based on the manufacturer’s specifications.

Any changes to the manufacturer’s configuration might result in the product not fitting your Cat equipment. Please consult your Cat Dealer before purchasing to ensure that this part is appropriate for your Cat equipment in its current condition and assumed configuration. This indicator cannot guarantee compatibility for all parts.

Remanufactured

Non-Returnable

Kit

Replaced

Remanufactured

Non-Returnable

Kit

Replaced

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