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MS9966-03 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

MS9966-03: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER FLUOROSILICONE CLASS FQ, hardness_rating: 75.0 SHORE DUROMETER A NOMINAL, center_hole_diameter: 0.296 INCHES MINIMUM AND 0.306 INCHES MAXIMUM IN, cross-sectional_height: 0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN, material_document_and_classification: AMS7273 ASSN STD SINGLE MATERIAL RESPONSE. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-511-3072, 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
MS9966-03
NSN: 5331-01-511-3072
FSC: 5331 — O-ring
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialRUBBER FLUOROSILICONE CLASS FQ
hardness_rating75.0 SHORE DUROMETER A NOMINAL
center_hole_diameter0.296 INCHES MINIMUM AND 0.306 INCHES MAXIMUM IN
cross-sectional_height0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
material_document_and_classificationAMS7273 ASSN STD SINGLE MATERIAL RESPONSE
NSN5331-01-511-3072
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS9966-03 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 HEIGHT: 0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
•
HARDNESS RATING: 75.0 SHORE DUROMETER A NOMINAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS7273 ASSN STD SINGLE MATERIAL RESPONSE
•
CENTER HOLE DIAMETER: 0.296 INCHES MINIMUM AND 0.306 INCHES MAXIMUM IN
•
MATERIAL: RUBBER FLUOROSILICONE CLASS FQ
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
HARDNESS RATING75.0 SHORE DUROMETER A NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS7273 ASSN STD SINGLE MATERIAL RESPONSE
CENTER HOLE DIAMETER0.296 INCHES MINIMUM AND 0.306 INCHES MAXIMUM IN
MATERIALRUBBER FLUOROSILICONE CLASS FQ
SUBSTITUTES & CROSS-REFERENCES 1
SAE-AS9966Reference document
Same NSN cross-reference
Reference document — Design control — primary 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 MS9966-03?
MS9966-03 is a O-RING.
What parts can replace MS9966-03?
There is 1 known substitute for MS9966-03: SAE-AS9966. Substitute compatibility should be verified for your specific system.
What is the NSN for MS9966-03?
MS9966-03 is cataloged in the U.S. Government catalog under NSN 5331-01-511-3072. 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.