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MS51091-4 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

MS51091-4: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include end_item_identification: SPECIAL TOOL AND SUPPORT EQUIPMENT. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-087-3612, 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
MS51091-4
NSN: 5330-00-087-3612
NIINs: 000873612, 014600159
FSC: 5330 — Packing and Gasket Materials
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
end_item_identificationSPECIAL TOOL AND SUPPORT EQUIPMENT
NSN5330-00-087-3612
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS51091-4 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
•
CROSS-SECTIONAL THICKNESS: 0.062 INCHES NOMINAL IN
•
HARDNESS RATING: 70.0 SHORE DUROMETER A NOMINAL OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE DIAMETER: 2.025 INCHES NOMINAL IN
•
APERTURE DIAMETER: 1.562 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.062 INCHES NOMINAL IN
HARDNESS RATING70.0 SHORE DUROMETER A NOMINAL OVERALL
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER2.025 INCHES NOMINAL IN
APERTURE DIAMETER1.562 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 3
A-A-52468Reference document
Same NSN cross-reference
Reference document — Identification reference
A 52468-4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
7744707Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS51091-4?
MS51091-4 is a GASKET.
What parts can replace MS51091-4?
There are 3 known substitutes for MS51091-4: A-A-52468, A 52468-4, 7744707. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51091-4?
MS51091-4 is cataloged in the U.S. Government catalog under NSN 5330-00-087-3612. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.