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Technical Data Sheet
PartsTable / COMPONENT / ST7M328-250
ST7M328-250 ✓ 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 SEAL SPECIAL 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 5330-01-071-3359, 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
ST7M328-250
NSN: 5330-01-071-3359
FSC: 5330
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
Part NumberST7M328-250
NSN5330-01-071-3359
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: ST7M328-250 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 6
490250Interchangeable
interchangeable cross-reference
interchangeable
407127Interchangeable
interchangeable cross-reference
interchangeable
613921Interchangeable
interchangeable cross-reference
interchangeable
690250Interchangeable
interchangeable cross-reference
interchangeable
4.9025.0Interchangeable
interchangeable cross-reference
interchangeable
10202383Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ST7M328-250?
ST7M328-250 is a SEAL SPECIAL.
What parts can replace ST7M328-250?
There are 6 known substitutes for ST7M328-250: 490250, 407127, 613921 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ST7M328-250?
ST7M328-250 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-071-3359. 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