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12987759 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

12987759: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 1.965 INCHES NOMINAL IN, length: 5.700 INCHES NOMINAL IN, material: ALUMINUM ALLOY, body_thickness: 0.225 INCHES NOMINAL IN, securing_device_type: THREADED FASTENER, peripheral_shape_style: RECTANGLE, EIGHT HOLES. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-567-6535, 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
12987759
NSN: 5340-01-567-6535
FSC: 5340 — Hardware, Commercial
CAGE: 19200 — COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV LOGISTICS RESEARCH AND ENGINEERING DIRECTORATE (USA)
SPECIFICATIONS
width1.965 INCHES NOMINAL IN
length5.700 INCHES NOMINAL IN
materialALUMINUM ALLOY
body_thickness0.225 INCHES NOMINAL IN
securing_device_typeTHREADED FASTENER
peripheral_shape_styleRECTANGLE, EIGHT HOLES
end_item_identificationM1A2,COMMANDERS INTEGRATED THERMAL VIEWER,BLOCK
cross-sectional_shape_styleFLAT
corner_hole_centerline_radius0.093 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyCOVER,POWER SUPPLY BLOCK 1
distance_from_first_hole_centerline_to_end_along_width1.815 INCHES NOMINAL IN
distance_from_first_hole_centerline_to_end_along_length1.980 INCHES NOMINAL IN
NSN5340-01-567-6535
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12987759 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: 1.815 INCHES NOMINAL IN
•
LENGTH: 5.700 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLE CENTERLINE AND FIRST HOLE ALONG LENGTH: 1.980 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: FLAT
•
SECURING DEVICE TYPE: THREADED FASTENER
•
CORNER HOLE CENTERLINE RADIUS: 0.093 INCHES NOMINAL IN
•
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH: 1.980 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLE CENTERLINE AND FIRST HOLE ALONG WIDTH: 1.815 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG WIDTH1.815 INCHES NOMINAL IN
LENGTH5.700 INCHES NOMINAL IN
DISTANCE BETWEEN HOLE CENTERLINE AND FIRST HOLE ALONG LENGTH1.980 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEFLAT
SECURING DEVICE TYPETHREADED FASTENER
CORNER HOLE CENTERLINE RADIUS0.093 INCHES NOMINAL IN
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH1.980 INCHES NOMINAL IN
DISTANCE BETWEEN HOLE CENTERLINE AND FIRST HOLE ALONG WIDTH1.815 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLERECTANGLE, EIGHT HOLES
WIDTH1.965 INCHES NOMINAL IN
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 1
40329104Same 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 demandDemilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is 12987759?
12987759 is a COVER,ACCESS.
What parts can replace 12987759?
There is 1 known substitute for 12987759: 40329104. Substitute compatibility should be verified for your specific system.
What is the NSN for 12987759?
12987759 is cataloged in the U.S. Government catalog under NSN 5340-01-567-6535. 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.