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PartsTable / COMPONENT / STSPK904-3
STSPK904-3 ✓ 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

SEAL,NONMETALLIC SPECIAL SHAPED. Key specifications include material: RUBBER SYNTHETIC OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-105-4428, 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
STSPK904-3
NSN: 5330-00-105-4428
FSC: 5330
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
NSN5330-00-105-4428
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: STSPK904-3 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: RUBBER SYNTHETIC OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER SYNTHETIC OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
52903Interchangeable
interchangeable cross-reference
interchangeable
8851Interchangeable
interchangeable cross-reference
interchangeable
527-03Interchangeable
interchangeable cross-reference
interchangeable
624VLK00412Interchangeable
interchangeable cross-reference
interchangeable
52-870Interchangeable
interchangeable cross-reference
interchangeable
CAT.NC-202Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is STSPK904-3?
STSPK904-3 is a SEAL,NONMETALLIC SPECIAL SHAPED.
What parts can replace STSPK904-3?
There are 6 known substitutes for STSPK904-3: 52903, 8851, 527-03 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for STSPK904-3?
STSPK904-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-105-4428. 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