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HomeHardware, Seals, & ConsumablesSeals, Gaskets, & O-RingsO-Rings4H-6520: 3.53 x 183.74mm 75A NBR O-Ring
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Hardware, Seals, & ConsumablesSeals, Gaskets, & O-RingsO-Rings
4H-6520: 3.53 x 183.74mm 75A NBR O-Ring
4H-6520: 3.53 x 183.74mm 75A NBR O-Ring

O-ring

Brand: Cat

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4H-6520: 3.53 x 183.74mm 75A NBR O-Ring
4H-6520: 3.53 x 183.74mm 75A NBR O-Ring
4H-6520: 3.53 x 183.74mm 75A NBR O-Ring
4H-6520: 3.53 x 183.74mm 75A NBR O-Ring
4H-6520: 3.53 x 183.74mm 75A NBR O-Ring

O-ring

Brand: Cat

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Description
Description

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.

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.

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.

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
Specifications
Units of MeasureUSMetric
Cross Section Diameter (mm): 3.53
Cross Section Diameter (in): 0.139
Inside Diameter (mm): 183.74
Inside Diameter (in): 7.234
Material: NBR (75),NBR - Nitrile,Nitrile (NBR),Nitrile / NBR / HNBR / XNBR Rubber
Polymer: NBR (Nitrile butadiene)
Material Hardness: 75A
Dash Size: 263
Units of MeasureUSMetric
Cross Section Diameter (mm): 3.53
Cross Section Diameter (in): 0.139
Inside Diameter (mm): 183.74
View More
Compatible Models
Compatible Models
Underground Art Truck
AD30
Generator
SR4
Truck Engine
3406
Integrated Toolcarrier
IT62G IIIT62GIT62H
Wheel Tractor-Scraper
613G
Site Prep Tractor
586C2864C
Load Haul Dump
R1600GR1600HR1600R1300GR1300G IIR1300
Motor Grader
14120M160H ES120M 212H NA163H160140M140K140H14L140H NA150140K 2160M 3 AWD140143H12H12K12M 2160K160H160M140M 3 AWD140M 2160H NA140 GC12H ES163H NA160M 2140H ES
Winch
52851856H53565558
Rotary Cutter
RC15
Backhoe
D3931
Track Skidder
D5HTSK II527
Wheel Skidder
518528545555D530B535D535C535B545D545C528B525D525C525B
Track-Type Tractor
D6H XLD6H XRD6H IID3C II30/30D3BD3CD4BD4CD5BD5CD6DD6N XLD6ND6HD7ED9D8LD8ND9TD9RDEUCED6N LGPD4C IID7E LGP
Asphalt Paver
AP655AP600AP555FAP500FAP655FAP655F LAP600F
Marine Engine
3406
Track Feller Buncher
522521521B522B
Towed Scraper
TS225TS185TS180
Front Shovel
235C
Excavator
225231D235235B235C235D245245D245B
Petroleum Package
TH35-E81TH31-E61
Wheel Tractor
615613611615C II613C II615C613B613C
Marine Transmission
72117221
Hydraulic Control
163153
Track Loader
963931C II973935C935B943953963B953B931B931C935C II
Soil Compactor
825H825G825C825B815825G II
Petroleum Transmission
TH31-E61TH35-E81
Ejector Truck
730
Wheel Dozer
834824B814
Landfill Compactor
816
Grapple
120C518125C
Wheel Loader
960F966972M972972L966 GC972 XE966 XE966XE980950G II950B950E950G962H950F962G950H950K962K966C966L966M966R950980F II950B/950E950GC950 GC972M XE966M XE980B962G II980C980F972XE950F II
Gen Set Engine
3406
Industrial Tractor
HA771HA871TK381TK371
Articulated Truck
D550B725CD44BD20DD35HPD30CD30DD250E IID35CD300ED300DD300B725C2D250ED250DD250BD400DD25DD25CD350ED350DD350CD400725D40D730735D300E II
Ripper
953B9779639539433658
Boom
120C
Industrial Engine
3406
Truck
777B777D
Wheel Scraper
666B666657
Wheel Feller Buncher
2570C2570D5435332470CHA770TK370573C573DTK380HA870563C563D2670C553C2670D
Bulldozer
6SU8S8U65AD5C PATLGP5S6A6S8A8253S5A PAT3P8SUD5C PAT
View More
Underground Art Truck
AD30
Warranty Information
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Parts diagram for 4H-6520
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DiagramDescriptionSpecificationsCompatible Models
Parts diagram for 4H-6520
View Detailed Parts Diagrams
Add Your Equipment
Description for part number 4H-6520

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 4H-6520

Units of Measure

USMetric
Cross Section Diameter (mm): 3.53
Cross Section Diameter (in): 0.139
Inside Diameter (mm): 183.74
Inside Diameter (in): 7.234
Material: NBR (75),NBR - Nitrile,Nitrile (NBR),Nitrile / NBR / HNBR / XNBR Rubber
Polymer: NBR (Nitrile butadiene)
Material Hardness: 75A
Dash Size: 263
View More
Compatible Models for part number 4H-6520

UNDERGROUND ART TRUCK

AD30

GENERATOR

SR4

TRUCK ENGINE

3406

INTEGRATED TOOLCARRIER

IT62G II IT62G IT62H

WHEEL TRACTOR-SCRAPER

613G

SITE PREP TRACTOR

586C 2864C

LOAD HAUL DUMP

R1600G R1600H R1600 R1300G R1300G II R1300

MOTOR GRADER

14 120M 160H ES 120M 2 12H NA 163H 160 140M 140K 140H 14L 140H NA 150 140K 2 160M 3 AWD 140 143H 12H 12K 12M 2 160K 160H 160M 140M 3 AWD 140M 2 160H NA 140 GC 12H ES 163H NA 160M 2 140H ES

WINCH

528 518 56H 53 56 55 58

ROTARY CUTTER

RC15

BACKHOE

D3 931

TRACK SKIDDER

D5HTSK II 527

WHEEL SKIDDER

518 528 545 555D 530B 535D 535C 535B 545D 545C 528B 525D 525C 525B

TRACK-TYPE TRACTOR

D6H XL D6H XR D6H II D3C II 30/30 D3B D3C D4B D4C D5B D5C D6D D6N XL D6N D6H D7E D9 D8L D8N D9T D9R DEUCE D6N LGP D4C II D7E LGP

ASPHALT PAVER

AP655 AP600 AP555F AP500F AP655F AP655F L AP600F

MARINE ENGINE

3406

TRACK FELLER BUNCHER

522 521 521B 522B

TOWED SCRAPER

TS225 TS185 TS180

FRONT SHOVEL

235C

EXCAVATOR

225 231D 235 235B 235C 235D 245 245D 245B

PETROLEUM PACKAGE

TH35-E81 TH31-E61

WHEEL TRACTOR

615 613 611 615C II 613C II 615C 613B 613C

MARINE TRANSMISSION

7211 7221

HYDRAULIC CONTROL

163 153

TRACK LOADER

963 931C II 973 935C 935B 943 953 963B 953B 931B 931C 935C II

SOIL COMPACTOR

825H 825G 825C 825B 815 825G II

PETROLEUM TRANSMISSION

TH31-E61 TH35-E81

EJECTOR TRUCK

730

WHEEL DOZER

834 824B 814

LANDFILL COMPACTOR

816

GRAPPLE

120C 518 125C

WHEEL LOADER

960F 966 972M 972 972L 966 GC 972 XE 966 XE 966XE 980 950G II 950B 950E 950G 962H 950F 962G 950H 950K 962K 966C 966L 966M 966R 950 980F II 950B/950E 950GC 950 GC 972M XE 966M XE 980B 962G II 980C 980F 972XE 950F II

GEN SET ENGINE

3406

INDUSTRIAL TRACTOR

HA771 HA871 TK381 TK371

ARTICULATED TRUCK

D550B 725C D44B D20D D35HP D30C D30D D250E II D35C D300E D300D D300B 725C2 D250E D250D D250B D400D D25D D25C D350E D350D D350C D400 725 D40D 730 735 D300E II

RIPPER

953B 977 963 953 943 3 6 5 8

BOOM

120C

INDUSTRIAL ENGINE

3406

TRUCK

777B 777D

WHEEL SCRAPER

666B 666 657

WHEEL FELLER BUNCHER

2570C 2570D 543 533 2470C HA770 TK370 573C 573D TK380 HA870 563C 563D 2670C 553C 2670D

BULLDOZER

6SU 8S 8U 6 5A D5C PATLGP 5S 6A 6S 8A 825 3S 5A PAT 3P 8SU D5C PAT

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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