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A21301 — ARMOR,TRANSPARENT,VEHICULAR WIND

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

A21301: ARMOR,TRANSPARENT,VEHICULAR WIND.

ARMOR,TRANSPARENT,VEHICULAR WIND. Key specifications include material: ALUMINUM ALLOY OVERALL, cooling_fin: NOT INCLUDED, balancing_pad: NOT INCLUDED, overall_width: 1.656 INCHES NOMINAL IN, oil_drain_hole: NOT INCLUDED, adjustment_hole: NOT INCLUDED. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-258-7473, 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
A21301
NSN: 5331-00-258-7473
NIINs: 002587473, 012361296, 016002079
FSC: 5331 — O-ring
CAGE: 10988 — CNH INDUSTRIAL AMERICA LLC DBA CNH AMERICA (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
cooling_finNOT INCLUDED
balancing_padNOT INCLUDED
overall_width1.656 INCHES NOMINAL IN
oil_drain_holeNOT INCLUDED
adjustment_holeNOT INCLUDED
inspection_holeNOT INCLUDED
center_hole_diameter0.500 INCHES NOMINAL IN
braking_surface_width1.656 INCHES NOMINAL IN
mounting_hole_spacing1.000 INCH CENTER TO CENTER IN
mounting_hole_diameter0.312 INCHES NOMINAL IN
mounting_hole_quantity2
NSN5331-00-258-7473
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A21301 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: 0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 9.945 INCHES MINIMUM AND 10.005 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SYNTHETIC
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
CENTER HOLE DIAMETER9.945 INCHES MINIMUM AND 10.005 INCHES MAXIMUM IN
MATERIALRUBBER SYNTHETIC
SUBSTITUTES & CROSS-REFERENCES 1
A2916EMReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A21301?
A21301 is a ARMOR,TRANSPARENT,VEHICULAR WIND.
What parts can replace A21301?
There is 1 known substitute for A21301: A2916EM. Substitute compatibility should be verified for your specific system.
What is the NSN for A21301?
A21301 is cataloged in the U.S. Government catalog under NSN 5331-00-258-7473. 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.