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Technical Data Sheet
PartsTable / O-RING / MS 28775-012
MS 28775-012 ✓ 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 O-RING is a the manufacturer industrial component. Key specifications include criticality_code_justification: ZZZY. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-584-0265, 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
MS 28775-012
NSN: 5331-00-584-0265
FSC: 5331 — O-RING
CAGE: 13030 — LOCKHEED MARTIN SIPPICAN, INC. DIV COMMUNICATION DIVISION (USA)
SPECIFICATIONS
criticality_code_justificationZZZY
NSN5331-00-584-0265
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS 28775-012 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
•
OUTSIDE DIAMETER: 0.493 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
CROSS-SECTIONAL HEIGHT: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 0.359 INCHES MINIMUM AND 0.369 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.493 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONMULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
CENTER HOLE DIAMETER0.359 INCHES MINIMUM AND 0.369 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
SP3107Interchangeable
interchangeable cross-reference
interchangeable
151132Interchangeable
interchangeable cross-reference
interchangeable
151324TInterchangeable
interchangeable cross-reference
interchangeable
320159Interchangeable
interchangeable cross-reference
interchangeable
737701-2Interchangeable
interchangeable cross-reference
interchangeable
899-5-R470/680Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS 28775-012?
MS 28775-012 is a O-RING.
What parts can replace MS 28775-012?
There are 27 known substitutes for MS 28775-012: SP3107, 151132, 151324T and 24 more. Substitute compatibility should be verified for your specific system.
Is MS 28775-012 still available?
MS 28775-012 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026