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Technical Data Sheet
PartsTable / O-RING / AMS 7276-221
AMS 7276-221 ✓ 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 FLUOROCARBON CLASS FPM, hardness_rating: 75.0 SHORE DUROMETER A NOMINAL, outside_diameter: 1.679 INCHES MINIMUM AND 1.719 INCHES MAXIMUM IN, center_hole_diameter: 1.409 INCHES MINIMUM AND 1.433 INCHES MAXIMUM IN, elongation_percentage: 125 MAXIMUM, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-166-8412, 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
AMS 7276-221
NSN: 5331-00-166-8412
FSC: 5331 — O-RING
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialRUBBER FLUOROCARBON CLASS FPM
hardness_rating75.0 SHORE DUROMETER A NOMINAL
outside_diameter1.679 INCHES MINIMUM AND 1.719 INCHES MAXIMUM IN
center_hole_diameter1.409 INCHES MINIMUM AND 1.433 INCHES MAXIMUM IN
elongation_percentage125 MAXIMUM
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
NSN5331-00-166-8412
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AMS 7276-221 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: 1.679 INCHES MINIMUM AND 1.719 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
HARDNESS RATING: 75.0 SHORE DUROMETER A NOMINAL
•
CENTER HOLE DIAMETER: 1.409 INCHES MINIMUM AND 1.433 INCHES MAXIMUM IN
•
ELONGATION PERCENTAGE: 125 MAXIMUM
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER1.679 INCHES MINIMUM AND 1.719 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
HARDNESS RATING75.0 SHORE DUROMETER A NOMINAL
CENTER HOLE DIAMETER1.409 INCHES MINIMUM AND 1.433 INCHES MAXIMUM IN
ELONGATION PERCENTAGE125 MAXIMUM
MATERIALRUBBER FLUOROCARBON CLASS FPM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
5331PL1282818Interchangeable
interchangeable cross-reference
interchangeable
MIL-R-83248/2Interchangeable
interchangeable cross-reference
interchangeable
M83248/2-026Interchangeable
interchangeable cross-reference
interchangeable
AMS7529Interchangeable
interchangeable cross-reference
interchangeable
AS3581-026CPInterchangeable
interchangeable cross-reference
interchangeable
V3997PC19Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AMS 7276-221?
AMS 7276-221 is a O-RING.
What parts can replace AMS 7276-221?
There are 17 known substitutes for AMS 7276-221: 5331PL1282818, MIL-R-83248/2, M83248/2-026 and 14 more. Substitute compatibility should be verified for your specific system.
Is AMS 7276-221 still available?
AMS 7276-221 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