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Technical Data Sheet
PartsTable / COMPONENT / 51A2125B
51A2125B ✓ 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 CLIP,SPRING TENSION is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-359-0859, 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
51A2125B
NSN: 5340-00-359-0859
FSC: 5340
CAGE: 23040 — FORD MOTOR CO FORD PARTS AND SERVICE DIV GOVERNMENT PART SALES (USA)
SPECIFICATIONS
Part Number51A2125B
NSN5340-00-359-0859
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 51A2125B 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 9
18870Interchangeable
interchangeable cross-reference
interchangeable
79455Interchangeable
interchangeable cross-reference
interchangeable
3564-2000Interchangeable
interchangeable cross-reference
interchangeable
3464Interchangeable
interchangeable cross-reference
interchangeable
29550Interchangeable
interchangeable cross-reference
interchangeable
R-95780PC7Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 51A2125B?
51A2125B is a CLIP,SPRING TENSION.
What parts can replace 51A2125B?
There are 9 known substitutes for 51A2125B: 18870, 79455, 3564-2000 and 6 more. Substitute compatibility should be verified for your specific system.
Is 51A2125B still available?
51A2125B is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026