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Technical Data Sheet
PartsTable / COMPONENT / 3 1/2 SC
3 1/2 SC ✓ 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 3 1/2 SC 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 5340-01-008-7665, 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
3 1/2 SC
NSN: 5340-01-008-7665
FSC: 5340
CAGE: 99017 — CAPLUGS LLC DBA MOKON DIV CAPLUGS (USA)
SPECIFICATIONS
Part Number3 1/2 SC
NSN5340-01-008-7665
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3 1/2 SC 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
•
MATERIAL: PLASTIC, POLYETHYLENE (PP)
•
LENGTH UNDER SHOULDER: 1.375 INCHES NOMINAL IN
•
CLOSED END OVERALL DIAMETER: 3.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALPLASTIC, POLYETHYLENE (PP)
LENGTH UNDER SHOULDER1.375 INCHES NOMINAL IN
CLOSED END OVERALL DIAMETER3.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
312SGInterchangeable
interchangeable cross-reference
interchangeable
81502Interchangeable
interchangeable cross-reference
interchangeable
NDC00018Interchangeable
interchangeable cross-reference
interchangeable
PWA50317-14Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3 1/2 SC?
3 1/2 SC is a 3 1/2 SC.
What parts can replace 3 1/2 SC?
There are 4 known substitutes for 3 1/2 SC: 312SG, 81502, NDC00018 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3 1/2 SC?
3 1/2 SC is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-008-7665. 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