BackHomeHardware, Seals, & ConsumablesSeals, Gaskets, & O-RingsO-Rings6H-3977: 72.62mm Inner Diameter Seal O Ring
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Hardware, Seals, & ConsumablesSeals, Gaskets, & O-RingsO-Rings6H-3977: 72.62mm Inner Diameter Seal O Ring
6H-3977: 72.62mm Inner Diameter Seal O Ring
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6H-3977: 72.62mm Inner Diameter Seal O Ring
O-ring
Brand: Cat
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Warranty Information
Warranty Information
Generally, warranty for parts purchased on Parts.Cat.Com is 12 months from the invoice date as defined in the Caterpillar Limited Warranty. Parts Warranty covers defects in material and workmanship throughout the Warranty period once it has been installed. For complete Warranty detail contact your local Cat Dealer.
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Return Policy
Return Policy Information
Unless otherwise noted by a non-returnable part
icon, most parts can be returned to your authorized Cat® dealer under their return policy.
Need More Help? Contact Us
Find a DealerEmail
Warranty Information
Warranty Information
Generally, warranty for parts purchased on Parts.Cat.Com is 12 months from the invoice date as defined in the Caterpillar Limited Warranty. Parts Warranty covers defects in material and workmanship throughout the Warranty period once it has been installed. For complete Warranty detail contact your local Cat Dealer.
Need More Help? Contact Us
Find a DealerEmail
Return Policy
Return Policy Information
Unless otherwise noted by a non-returnable part
icon, most parts can be returned to your authorized Cat® dealer under their return policy.
Need More Help? Contact Us
Find a DealerEmail
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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Parts diagram for 6H-3977
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Description for part number 6H-3977
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.
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: 233
Seal/O-Ring Type: Standard
Primary Sealing Material: Rubber
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Compatible Models for part number 6H-3977
GENERATOR
SR4
WHEEL TRACTOR-SCRAPER
623K LRC 623K 621K 627K
LOAD HAUL DUMP
R1600 R2900
OFF HIGHWAY TRUCK
796 AC
WINCH
57 58
MOTOR GRADER
120B 16 14 18 120M 140B 160 14L 150 140 14E 12M 14M3 120 12F 12E 140M 3 14M-3
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.
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: 233
Seal/O-Ring Type: Standard
Primary Sealing Material: Rubber
View More
Compatible Models for part number 6H-3977
GENERATOR
SR4
WHEEL TRACTOR-SCRAPER
623K LRC 623K 621K 627K
LOAD HAUL DUMP
R1600 R2900
OFF HIGHWAY TRUCK
796 AC
WINCH
57 58
MOTOR GRADER
120B 16 14 18 120M 140B 160 14L 150 140 14E 12M 14M3 120 12F 12E 140M 3 14M-3
