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Technical Data Sheet
3174AS4781 ✓ 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 STANDOFF,THREADED,SPACING is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-424-2985, 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
3174AS4781
NSN: 5340-01-424-2985
FSC: 5340
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
Part Number3174AS4781
NSN5340-01-424-2985
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3174AS4781 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 5
90055-1Interchangeable
interchangeable cross-reference
interchangeable
10345Interchangeable
interchangeable cross-reference
interchangeable
25519Interchangeable
interchangeable cross-reference
interchangeable
E-101311-2 PIECE 43Interchangeable
interchangeable cross-reference
interchangeable
P550090Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3174AS4781?
3174AS4781 is a STANDOFF,THREADED,SPACING.
What parts can replace 3174AS4781?
There are 5 known substitutes for 3174AS4781: 90055-1, 10345, 25519 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3174AS4781?
3174AS4781 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-424-2985. This indicates validated use in U.S. government and defense supply chains.
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