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PartsTable / COMPONENT / 404359ITEM57
404359ITEM57 ✓ 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

COVER,PROTECTIVE,DUST AND MOISTU. Key specifications include part_name_assigned_by_controlling_agency: COVER,PROTECTIVE,DUST AND MOISTURE SEAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-630-5516, 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
404359ITEM57
NSN: 5340-01-630-5516
FSC: 5340
CAGE: 57626 — COMSACO, LLC DBA COMSACO INC (USA)
SPECIFICATIONS
part_name_assigned_by_controlling_agencyCOVER,PROTECTIVE,DUST AND MOISTURE SEAL
NSN5340-01-630-5516
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 404359ITEM57 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
TECHNICAL CHARACTERISTICS (FLIS)
PART NAME ASSIGNED BY CONTROLLING AGENCYCOVER,PROTECTIVE,DUST AND MOISTURE SEAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
457-5936Interchangeable
interchangeable cross-reference
interchangeable
WC00596D21Interchangeable
interchangeable cross-reference
interchangeable
104683-001Interchangeable
interchangeable cross-reference
interchangeable
5266CInterchangeable
interchangeable cross-reference
interchangeable
MBE73325Interchangeable
interchangeable cross-reference
interchangeable
5266CYInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 404359ITEM57?
404359ITEM57 is a COVER,PROTECTIVE,DUST AND MOISTU.
What parts can replace 404359ITEM57?
There are 8 known substitutes for 404359ITEM57: 457-5936, WC00596D21, 104683-001 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 404359ITEM57?
404359ITEM57 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-630-5516. 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