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371-7631 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

371-7631: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include end_item_identification: KOLOM COLUMN, part_name_assigned_by_controlling_agency: RING. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-521-0223, 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
371-7631
NSN: 5331-01-521-0223
FSC: 5331 — O-ring
CAGE: 34914 — HIAB USA INC (USA)
SPECIFICATIONS
end_item_identificationKOLOM COLUMN
part_name_assigned_by_controlling_agencyRING
NSN5331-01-521-0223
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 371-7631 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
TECHNICAL CHARACTERISTICS
PART NAME ASSIGNED BY CONTROLLING AGENCYRING
END ITEM IDENTIFICATIONKOLOM COLUMN
SUBSTITUTES & CROSS-REFERENCES 2
4KK578Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
4963482Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 371-7631?
371-7631 is a O-RING.
What parts can replace 371-7631?
There are 2 known substitutes for 371-7631: 4KK578, 4963482. Substitute compatibility should be verified for your specific system.
What is the NSN for 371-7631?
371-7631 is cataloged in the U.S. Government catalog under NSN 5331-01-521-0223. This indicates validated use in U.S. government and defense supply chains.
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