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Technical Data Sheet
PartsTable / O-RING / MS29512-4
MS29512-4 ✓ 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 material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, outside_diameter: 0.484 INCHES MINIMUM AND 0.506 INCHES MAXIMUM IN, center_hole_diameter: 0.346 INCHES MINIMUM AND 0.356 INCHES MAXIMUM IN, cross-sectional_height: 0.069 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-166-5994, 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
MS29512-4
NSN: 5331-00-166-5994
FSC: 5331 — O-RING
CAGE: 09790 — EATON AEROSPACE LLC DBA STERER ENGINEERING DIV VALVE & ACTUATOR (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
outside_diameter0.484 INCHES MINIMUM AND 0.506 INCHES MAXIMUM IN
center_hole_diameter0.346 INCHES MINIMUM AND 0.356 INCHES MAXIMUM IN
cross-sectional_height0.069 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
NSN5331-00-166-5994
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS29512-4 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
•
CENTER HOLE DIAMETER: 0.346 INCHES MINIMUM AND 0.356 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.069 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
ELONGATION PERCENTAGE: 200 MAXIMUM
•
DEPARTURE FROM CITED DOCUMENT: CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
•
HARDNESS RATING: 65.0 SHORE DUROMETER A NOMINAL
•
CRITICALITY CODE JUSTIFICATION: ZZZW
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER0.346 INCHES MINIMUM AND 0.356 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.069 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
END ITEM IDENTIFICATIONMULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
ELONGATION PERCENTAGE200 MAXIMUM
DEPARTURE FROM CITED DOCUMENTCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
HARDNESS RATING65.0 SHORE DUROMETER A NOMINAL
CRITICALITY CODE JUSTIFICATIONZZZW
OUTSIDE DIAMETER0.495 INCHES NOMINAL IN
TEMP RATING-65.0 FAHRENHEIT AND 180.0 FAHRENHEIT DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
MS29512-04Interchangeable
interchangeable cross-reference
interchangeable
269-78REVAPC27Interchangeable
interchangeable cross-reference
interchangeable
GA1070Interchangeable
interchangeable cross-reference
interchangeable
5331PL2083851Interchangeable
Same NIIN cross-reference
interchangeable
SAE-AS29512Interchangeable
Same NIIN cross-reference
interchangeable
MS29512-04CPInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS29512-4?
MS29512-4 is a O-RING.
What parts can replace MS29512-4?
There are 7 known substitutes for MS29512-4: MS29512-04, 269-78REVAPC27, GA1070 and 4 more. Substitute compatibility should be verified for your specific system.
Is MS29512-4 still available?
MS29512-4 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