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Technical Data Sheet
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2CT976 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include color: BLACK, material: RUBBER SYNTHETIC OVERALL, hardness_rating: 75.0 SHORE DUROMETER A MINIMUM AND 85.0 SHORE DUROMETER A MAXIMUM OVERALL, center_hole_diameter: 0.750 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN, cross-sectional_height: 0.094 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN, end_item_identification: NSN 3990-01-442-1939 BRIDGE ADAPTER PALLET; HEMTT (HEAVY EXPANDED MOBILITY TACTICAL TRUCK). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-485-3586, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
2CT976
NSN: 5330-00-485-3586
FSC: 5330
CAGE: 45152 — OSHKOSH CORP (USA)
SPECIFICATIONS
colorBLACK
materialRUBBER SYNTHETIC OVERALL
hardness_rating75.0 SHORE DUROMETER A MINIMUM AND 85.0 SHORE DUROMETER A MAXIMUM OVERALL
center_hole_diameter0.750 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
cross-sectional_height0.094 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
end_item_identificationNSN 3990-01-442-1939 BRIDGE ADAPTER PALLET; HEMTT (HEAVY EXPANDED MOBILITY TACTICAL TRUCK)
cross-sectional_shape_styleO-RING
material_document_and_classificationMIL-R-1149,TY 2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5330-00-485-3586
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2CT976 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CROSS-SECTIONAL HEIGHT: 0.094 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SYNTHETIC OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: O-RING
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-1149,TY 2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
COLOR: BLACK
•
HARDNESS RATING: 75.0 SHORE DUROMETER A MINIMUM AND 85.0 SHORE DUROMETER A MAXIMUM OVERALL
•
CENTER HOLE DIAMETER: 0.750 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.094 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONNSN 3990-01-442-1939 BRIDGE ADAPTER PALLET; HEMTT (HEAVY EXPANDED MOBILITY TACTICAL TRUCK)
MATERIALRUBBER SYNTHETIC OVERALL
CROSS-SECTIONAL SHAPE STYLEO-RING
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-1149,TY 2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
COLORBLACK
HARDNESS RATING75.0 SHORE DUROMETER A MINIMUM AND 85.0 SHORE DUROMETER A MAXIMUM OVERALL
CENTER HOLE DIAMETER0.750 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
421721Interchangeable
interchangeable cross-reference
interchangeable
FFS92TYPE1STYLE1SInterchangeable
interchangeable cross-reference
interchangeable
7046Interchangeable
interchangeable cross-reference
interchangeable
695225Interchangeable
interchangeable cross-reference
interchangeable
60300-55Interchangeable
interchangeable cross-reference
interchangeable
704-6M99Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2CT976?
2CT976 is a PACKING,PREFORMED.
What parts can replace 2CT976?
There are 18 known substitutes for 2CT976: 421721, FFS92TYPE1STYLE1S, 7046 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2CT976?
2CT976 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-485-3586. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026