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2670-57 PIECE 18 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

2670-57 PIECE 18: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. This part is cataloged in the U.S. Government catalog under NSN 5340-01-160-7773, 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
2670-57 PIECE 18
NSN: 5340-01-160-7773
FSC: 5340 — Hardware, Commercial
CAGE: 43689 — HUNTINGTON INGALLS INC DIV NEWPORT NEWS SHIPBUILDING (USA)
SPECIFICATIONS
Part Number2670-57 PIECE 18
NSN5340-01-160-7773
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2670-57 PIECE 18 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
4556027 ITEM 18Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
5400-32-4SReference document
Same NSN cross-reference
Reference document — Design control — primary reference
503-4556027ITEM18Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 2670-57 PIECE 18?
2670-57 PIECE 18 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 2670-57 PIECE 18?
There are 3 known substitutes for 2670-57 PIECE 18: 4556027 ITEM 18, 5400-32-4S, 503-4556027ITEM18. Substitute compatibility should be verified for your specific system.
What is the NSN for 2670-57 PIECE 18?
2670-57 PIECE 18 is cataloged in the U.S. Government catalog under NSN 5340-01-160-7773. 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.