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66131-U-811 — 66131-U-811

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

66131-U-811: 66131-U-811.

The 66131-U-811 is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5330-01-453-2132, 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
66131-U-811
NSN: 5330-01-453-2132
FSC: 5330 — Packing and Gasket Materials
CAGE: 76364 — MILWAUKEE VALVE CO, INC DIV MILWAUKEE VALVE COMPANY, LLC (USA)
SPECIFICATIONS
Part Number66131-U-811
NSN5330-01-453-2132
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 66131-U-811 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
•
STYLE DESIGNATOR: CIRCULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-C-6183 CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
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OUTSIDE DIAMETER: 13.875 INCHES NOMINAL IN
•
APERTURE DIAMETER: 9.375 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 12
•
BOLT CIRCLE DIAMETER: 12.469 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.062 INCHES NOMINAL IN
STYLE DESIGNATORCIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-6183 CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER13.875 INCHES NOMINAL IN
APERTURE DIAMETER9.375 INCHES NOMINAL IN
BOLT HOLE QUANTITY12
BOLT CIRCLE DIAMETER12.469 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC AND CORK OVERALL
HOLE DIAMETER0.812 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
SUBSTITUTES & CROSS-REFERENCES 2
66180-U-811Reference document
Same NSN cross-reference
Reference document — Secondary reference
5020BL080000010 ITEM 18Reference 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 66131-U-811?
66131-U-811 is a 66131-U-811.
What parts can replace 66131-U-811?
There are 2 known substitutes for 66131-U-811: 66180-U-811, 5020BL080000010 ITEM 18. Substitute compatibility should be verified for your specific system.
What is the NSN for 66131-U-811?
66131-U-811 is cataloged in the U.S. Government catalog under NSN 5330-01-453-2132. This indicates validated use in U.S. government and defense supply chains.
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U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.