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Technical Data Sheet
PartsTable / COMPONENT / MA128-21137
MA128-21137 ✓ 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 GASKET 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 5330-01-076-4830, 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
MA128-21137
NSN: 5330-01-076-4830
FSC: 5330
CAGE: 34623 — AM GENERAL LLC (USA)
SPECIFICATIONS
Part NumberMA128-21137
NSN5330-01-076-4830
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MA128-21137 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 27
1227TInterchangeable
interchangeable cross-reference
interchangeable
1227T4311Interchangeable
interchangeable cross-reference
interchangeable
M0DEL1227T0-50UADCInterchangeable
interchangeable cross-reference
interchangeable
1311WInterchangeable
interchangeable cross-reference
interchangeable
637662Interchangeable
interchangeable cross-reference
interchangeable
705214Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MA128-21137?
MA128-21137 is a GASKET.
What parts can replace MA128-21137?
There are 27 known substitutes for MA128-21137: 1227T, 1227T4311, M0DEL1227T0-50UADC and 24 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MA128-21137?
MA128-21137 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-076-4830. 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