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Technical Data Sheet
PartsTable / O-RING / P51-500 ITEM NO. 7
P51-500 ITEM NO. 7 ✓ 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 P51-500 ITEM NO. 7 is a the manufacturer industrial component. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-560-2990, 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
P51-500 ITEM NO. 7
NSN: 5331-01-560-2990
FSC: 5331 — O-RING
CAGE: 91816 — CIRCOR AEROSPACE, INC. DBA CIRCOR AEROSPACE INC (USA)
SPECIFICATIONS
Part NumberP51-500 ITEM NO. 7
NSN5331-01-560-2990
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: P51-500 ITEM NO. 7 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 12
95-5039Interchangeable
interchangeable cross-reference
interchangeable
5867751017Interchangeable
interchangeable cross-reference
interchangeable
31-6502Interchangeable
interchangeable cross-reference
interchangeable
P51500Interchangeable
interchangeable cross-reference
interchangeable
404002Interchangeable
interchangeable cross-reference
interchangeable
401062Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is P51-500 ITEM NO. 7?
P51-500 ITEM NO. 7 is a P51-500 ITEM NO. 7.
What parts can replace P51-500 ITEM NO. 7?
There are 12 known substitutes for P51-500 ITEM NO. 7: 95-5039, 5867751017, 31-6502 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for P51-500 ITEM NO. 7?
P51-500 ITEM NO. 7 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-560-2990. 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