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AN123921 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

AN123921: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, hardness_rating: 72.0 SHORE DUROMETER A MINIMUM AND 78.0 SHORE DUROMETER A MAXIMUM, peripheral_diameter: 7.012 INCHES NOMINAL IN, center_hole_diameter: 6.711 INCHES MINIMUM AND 6.757 INCHES MAXIMUM IN, elongation_percentage: 150 MAXIMUM, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-263-8019, 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
AN123921
NSN: 5331-00-263-8019
FSC: 5331 — O-ring
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
hardness_rating72.0 SHORE DUROMETER A MINIMUM AND 78.0 SHORE DUROMETER A MAXIMUM
peripheral_diameter7.012 INCHES NOMINAL IN
center_hole_diameter6.711 INCHES MINIMUM AND 6.757 INCHES MAXIMUM IN
elongation_percentage150 MAXIMUM
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
material_document_and_classificationAMS-7274 ASSN STD SINGLE MATERIAL RESPONSE
NSN5331-00-263-8019
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AN123921 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: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
HARDNESS RATING: 72.0 SHORE DUROMETER A MINIMUM AND 78.0 SHORE DUROMETER A MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS-7274 ASSN STD SINGLE MATERIAL RESPONSE
•
ELONGATION PERCENTAGE: 150 MAXIMUM
•
PERIPHERAL DIAMETER: 7.012 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 6.711 INCHES MINIMUM AND 6.757 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
HARDNESS RATING72.0 SHORE DUROMETER A MINIMUM AND 78.0 SHORE DUROMETER A MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS-7274 ASSN STD SINGLE MATERIAL RESPONSE
ELONGATION PERCENTAGE150 MAXIMUM
PERIPHERAL DIAMETER7.012 INCHES NOMINAL IN
CENTER HOLE DIAMETER6.711 INCHES MINIMUM AND 6.757 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
OTHER ITEMS IN FSC 5331 — O-ring
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5331-00-001-1971 5331-00-001-1979 5331-00-001-3904 5331-00-001-3905 5331-00-001-3906 5331-00-001-3908 5331-00-001-3923 5331-00-001-3924
SUBSTITUTES & CROSS-REFERENCES 4
35039CSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
SAE-AS3570Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
2L1126Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS3570-261Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AN123921?
AN123921 is a O-RING.
What parts can replace AN123921?
There are 4 known substitutes for AN123921: 35039C, SAE-AS3570, 2L1126 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AN123921?
AN123921 is cataloged in the U.S. Government catalog under NSN 5331-00-263-8019. This indicates validated use in U.S. government and defense supply chains.
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