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Technical Data Sheet
PartsTable / COMPONENT / 51688A
51688A ✓ 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 GASKET,LIGHT is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-898-7436, 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
51688A
NSN: 5330-00-898-7436
FSC: 5330
CAGE: 0B3Z1 — ACTIVE APPLICATIONS INC (USA)
SPECIFICATIONS
Part Number51688A
NSN5330-00-898-7436
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 51688A 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 13
1-4100Interchangeable
interchangeable cross-reference
interchangeable
T4Interchangeable
interchangeable cross-reference
interchangeable
4100-01Interchangeable
interchangeable cross-reference
interchangeable
2551D0004Interchangeable
interchangeable cross-reference
interchangeable
20-58448-3Interchangeable
interchangeable cross-reference
interchangeable
41000-100-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 51688A?
51688A is a GASKET,LIGHT.
What parts can replace 51688A?
There are 13 known substitutes for 51688A: 1-4100, T4, 4100-01 and 10 more. Substitute compatibility should be verified for your specific system.
Is 51688A still available?
51688A 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