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3SH81 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

3SH81: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, temp_rating: -40.0 FAHRENHEIT AND 300.0 FAHRENHEIT DEGF, hardness_rating: 65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM OVERALL, outside_diameter: 4.435 INCHES NOMINAL IN, style_designator: CIRCULAR, aperture_diameter: 4.227 INCHES MINIMUM AND 4.247 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-040-4798, 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
3SH81
NSN: 5330-01-040-4798
FSC: 5330 — Packing and Gasket Materials
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
temp_rating-40.0 FAHRENHEIT AND 300.0 FAHRENHEIT DEGF
hardness_rating65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM OVERALL
outside_diameter4.435 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter4.227 INCHES MINIMUM AND 4.247 INCHES MAXIMUM IN
end_item_identificationFAMILY OF HEMTT VEHICLES (HEAVY EXPANDED MOBILITY TACTICAL TRUCKS); NSN 2320-01-304-2277 AND 2320-01-304-2278 PLS (PALLETIZED LOADING SYSTEM)
cross-sectional_thickness0.096 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classification1225 FSCM 91265 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NSN5330-01-040-4798
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3SH81 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
•
TEMP RATING: -40.0 FAHRENHEIT AND 300.0 FAHRENHEIT DEGF
•
CROSS-SECTIONAL THICKNESS: 0.096 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN
•
HARDNESS RATING: 65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM OVERALL
•
STYLE DESIGNATOR: CIRCULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: 1225 FSCM 91265 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE DIAMETER: 4.435 INCHES NOMINAL IN
•
APERTURE DIAMETER: 4.227 INCHES MINIMUM AND 4.247 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
TEMP RATING-40.0 FAHRENHEIT AND 300.0 FAHRENHEIT DEGF
CROSS-SECTIONAL THICKNESS0.096 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN
HARDNESS RATING65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM OVERALL
STYLE DESIGNATORCIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATION1225 FSCM 91265 MFR REF SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER4.435 INCHES NOMINAL IN
APERTURE DIAMETER4.227 INCHES MINIMUM AND 4.247 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONFAMILY OF HEMTT VEHICLES (HEAVY EXPANDED MOBILITY TACTICAL TRUCKS); NSN 2320-01-304-2277 AND 2320-01-304-2278 PLS (PALLETIZED LOADING SYSTEM)
MATERIALRUBBER SYNTHETIC OVERALL
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES 2
5330010404798Reference document
Same NSN cross-reference
Reference document — Informative reference only
2370311Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3SH81?
3SH81 is a GASKET.
What parts can replace 3SH81?
There are 2 known substitutes for 3SH81: 5330010404798, 2370311. Substitute compatibility should be verified for your specific system.
What is the NSN for 3SH81?
3SH81 is cataloged in the U.S. Government catalog under NSN 5330-01-040-4798. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.