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Technical Data Sheet
PartsTable / COMPONENT / 8681938P1
8681938P1 ✓ 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

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include design_type: FRICTION, thread_class: 2A A, thread_size_and_series/type_designator: 0.687-24 UNEF, opening_inside_diameter_for_which_designed: 0.500 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-090-4742, 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
8681938P1
NSN: 5340-00-090-4742
FSC: 5340
CAGE: 24446 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
design_typeFRICTION
thread_class2A A
thread_size_and_series/type_designator0.687-24 UNEF
opening_inside_diameter_for_which_designed0.500 INCHES NOMINAL IN
NSN5340-00-090-4742
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 8681938P1 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
KEY FEATURES
•
DESIGN TYPE: FRICTION
•
THREAD CLASS: 2A A
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 0.687-24 UNEF
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
DESIGN TYPEFRICTION
THREAD CLASS2A A
THREAD SIZE AND SERIES/TYPE DESIGNATOR0.687-24 UNEF
OPENING INSIDE DIAMETER FOR WHICH DESIGNED0.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
2GL153Upgraded Successor
successor cross-reference
successor
12976-GUpgraded Successor
successor cross-reference
successor
84905Interchangeable
interchangeable cross-reference
interchangeable
27-10395-2Interchangeable
interchangeable cross-reference
interchangeable
12976Interchangeable
interchangeable cross-reference
interchangeable
110 1-25/64Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8681938P1?
8681938P1 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 8681938P1?
There are 17 known substitutes for 8681938P1: 2GL153, 12976-G, 84905 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8681938P1?
8681938P1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-090-4742. 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