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Technical Data Sheet
PartsTable / COMPONENT / 7657-2-2 ITEM 8
7657-2-2 ITEM 8 ✓ 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

RETAINER,HELICAL COMPRESSION SPR. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-446-5365, 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
7657-2-2 ITEM 8
NSN: 5340-01-446-5365
FSC: 5340
CAGE: 99447 — COOPER INTERCONNECT, INC. DBA COOPER INTERCONNECT DIV INTERCONNECT (USA)
SPECIFICATIONS
Part Number7657-2-2 ITEM 8
NSN5340-01-446-5365
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 7657-2-2 ITEM 8 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
BS-8053Upgraded Successor
successor cross-reference
successor
8053Upgraded Successor
successor cross-reference
successor
72-503Interchangeable
interchangeable cross-reference
interchangeable
71-688Interchangeable
interchangeable cross-reference
interchangeable
BA53Interchangeable
interchangeable cross-reference
interchangeable
MILB18Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7657-2-2 ITEM 8?
7657-2-2 ITEM 8 is a RETAINER,HELICAL COMPRESSION SPR.
What parts can replace 7657-2-2 ITEM 8?
There are 22 known substitutes for 7657-2-2 ITEM 8: BS-8053, 8053, 72-503 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 7657-2-2 ITEM 8?
7657-2-2 ITEM 8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-446-5365. 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.
PartsTable Design LLC · partstable.com
Last verified: July 2026