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12509321 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

12509321: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 466.8 MILLIMETERS NOMINAL MM, length: 778.1 MILLIMETERS NOMINAL MM, material: STEEL, body_thickness: 3.0 MILLIMETERS NOMINAL MM, peripheral_shape_style: RECTANGLE, MULTI HOLES, end_item_identification: 2320-01-565-3428. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-579-3942, 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
12509321
NSN: 5340-01-579-3942
NIINs: 015793942, 015798470, 015798476
FSC: 5340 — Hardware, Commercial
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
width466.8 MILLIMETERS NOMINAL MM
length778.1 MILLIMETERS NOMINAL MM
materialSTEEL
body_thickness3.0 MILLIMETERS NOMINAL MM
peripheral_shape_styleRECTANGLE, MULTI HOLES
end_item_identification2320-01-565-3428
hole_quantity_along_width3
hole_quantity_along_length4
cross-sectional_shape_styleFLAT W/OPEN CENTER
part_name_assigned_by_controlling_agencyPLATE,COVER,TRANSPARENT ARMOR
distance_from_first_hole_centerline_to_end_along_width25.0 MILLIMETERS NOMINAL MM
distance_from_first_hole_centerline_to_end_along_length25.0 MILLIMETERS NOMINAL MM
NSN5340-01-579-3942
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12509321 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
SUBSTITUTES & CROSS-REFERENCES 2
ACH10057-001Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
12509321-001Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 12509321?
12509321 is a COVER,ACCESS.
What parts can replace 12509321?
There are 2 known substitutes for 12509321: ACH10057-001, 12509321-001. Substitute compatibility should be verified for your specific system.
What is the NSN for 12509321?
12509321 is cataloged in the U.S. Government catalog under NSN 5340-01-579-3942. 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.