An industrial O-Ring Seal prevents leaks in machinery, pipelines, and hydraulic systems, made from durable, chemical-resistant materials.
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.
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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
Related parts
270-1533: O-Ring Seal Kit (70A Silicone)
O-Ring Seal Kit: Low Pressure, High Temperaure Applications, 32 Sizes, 149 Seals, Silicone, 70 Duro
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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 8M-4438
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Description for part number 8M-4438
Description: O-Rings are used in static sealing and some dynamic applications.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. 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 Silica, crystalline (airborne particles of respirable size), which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
Material Description: Silicone (VMQ) rubber is capable of service temperatures of -55 to 150C and is resistant air. Silicone rubber should not be used in applications that require resistance to fuel, oil and coolants.
Notes: Dimensions and material descriptions provided for reference only.
Polymer: VMQ (Silicone rubber)
Applications: Electrical system seals; High temperature air seals; High temperature static grease seals
Not Compatible With: Acetone; Aromatic hydrocarbons; EP oil; Fuel oil; Gasoline; Ketones; Low aniline point oils; Petroleum oils; Steam & hot water
24H 12G 120G 120K 160G 12F 16H NA 160H NA 12H NA 135H NA 14H NA 163H NA 140G 120H NA 16G 140H NA 130G 143H 14G 120K 2
BACKHOE
931 D3
COMPACT WHEEL LOADER
910
WHEEL LOADER
950B 950E 936E 988B 980C 930 936 930R 930T
TRACK SKIDDER
D4HTSK II
WHEEL SKIDDER
518
TRACK-TYPE TRACTOR
D7H D3 D5 D6R II D3B D4H D10R D4D D4E D4E SR D5B D5H D7R II D6D D6H
ENGINE - MACHINE
3304
GEN SET ENGINE
3304 3304B
RIPPER
7
MARINE ENGINE
D379A D379B D399 3304 3304B D346 D348 D398A D398B
INDUSTRIAL ENGINE
3304 D348 D349 3304B D399 D379 D379B
TRUCK
769 773 777 769B 769C 773B
WHEEL SCRAPER
666 666B 657 657B
GAS ENGINE
G398 G399 G379A G379
TRACTOR
776 772B 768C
EXCAVATOR
225
BULLDOZER
7SU 7S 7S LGP 824S 3S 3P 4A
RIPPER SCARIFIER
16G
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Description for part number 8M-4438
Description: O-Rings are used in static sealing and some dynamic applications.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. 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 Silica, crystalline (airborne particles of respirable size), which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
Material Description: Silicone (VMQ) rubber is capable of service temperatures of -55 to 150C and is resistant air. Silicone rubber should not be used in applications that require resistance to fuel, oil and coolants.
Notes: Dimensions and material descriptions provided for reference only.
Polymer: VMQ (Silicone rubber)
Applications: Electrical system seals; High temperature air seals; High temperature static grease seals
Not Compatible With: Acetone; Aromatic hydrocarbons; EP oil; Fuel oil; Gasoline; Ketones; Low aniline point oils; Petroleum oils; Steam & hot water
