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1002181-501 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

1002181-501: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. This part is cataloged in the U.S. Government catalog under NSN 5340-01-697-0957, 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
1002181-501
NSN: 5340-01-697-0957
FSC: 5340 — Hardware, Commercial
CAGE: 17476 — TELEDYNE INSTRUMENTS INC DBA DGO DIV TELEDYNE D.G.O'BRIEN (USA)
SPECIFICATIONS
Part Number1002181-501
NSN5340-01-697-0957
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1002181-501 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
SUBSTITUTES & CROSS-REFERENCES 3
77C964400Reference document
Same NSN cross-reference
Reference document — Secondary reference
PL77C964400G2-FIND NO-0014Reference document
Same NSN cross-reference
Reference document — Secondary reference
77C964400G2-FIND NO-14Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1002181-501?
1002181-501 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 1002181-501?
There are 3 known substitutes for 1002181-501: 77C964400, PL77C964400G2-FIND NO-0014, 77C964400G2-FIND NO-14. Substitute compatibility should be verified for your specific system.
What is the NSN for 1002181-501?
1002181-501 is cataloged in the U.S. Government catalog under NSN 5340-01-697-0957. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.