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12256812 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

12256812: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 40.120 INCHES NOMINAL IN, length: 15.000 INCHES NOMINAL IN, material: STEEL, body_thickness: 0.125 INCHES NOMINAL IN, securing_device_type: SPECIAL, peripheral_shape_style: RECTANGLE, TWO HOLES. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-082-3609, 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
12256812
NSN: 5340-01-082-3609
FSC: 5340 — Hardware, Commercial
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
width40.120 INCHES NOMINAL IN
length15.000 INCHES NOMINAL IN
materialSTEEL
body_thickness0.125 INCHES NOMINAL IN
securing_device_typeSPECIAL
peripheral_shape_styleRECTANGLE, TWO HOLES
end_item_identification2320-01-206-4080 TRUCK,DUMP
cross-sectional_shape_styleFLAT W/OPEN CENTER
distance_from_first_hole_centerline_to_end_along_width0.500 INCHES NOMINAL IN
distance_from_first_hole_centerline_to_end_along_length3.000 INCHES NOMINAL IN
distance_between_hole_centerline_and_first_hole_along_width7.680 INCHES NOMINAL IN
distance_between_hole_centerline_and_first_hole_along_length7.680 INCHES NOMINAL IN
NSN5340-01-082-3609
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12256812 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
•
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG WIDTH: 0.500 INCHES NOMINAL IN
•
LENGTH: 15.000 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLE CENTERLINE AND FIRST HOLE ALONG LENGTH: 7.680 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: FLAT W/OPEN CENTER
•
SECURING DEVICE TYPE: SPECIAL
•
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH: 3.000 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLE CENTERLINE AND FIRST HOLE ALONG WIDTH: 7.680 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: RECTANGLE, TWO HOLES
TECHNICAL CHARACTERISTICS
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG WIDTH0.500 INCHES NOMINAL IN
LENGTH15.000 INCHES NOMINAL IN
DISTANCE BETWEEN HOLE CENTERLINE AND FIRST HOLE ALONG LENGTH7.680 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEFLAT W/OPEN CENTER
SECURING DEVICE TYPESPECIAL
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH3.000 INCHES NOMINAL IN
DISTANCE BETWEEN HOLE CENTERLINE AND FIRST HOLE ALONG WIDTH7.680 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLERECTANGLE, TWO HOLES
WIDTH40.120 INCHES NOMINAL IN
END ITEM IDENTIFICATION2320-01-206-4080 TRUCK,DUMP
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 12256812?
12256812 is a COVER,ACCESS.
What is the NSN for 12256812?
12256812 is cataloged in the U.S. Government catalog under NSN 5340-01-082-3609. 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.