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863D1 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

863D1: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 2.875 INCHES NOMINAL IN, length: 3.875 INCHES NOMINAL IN, material: STEEL, ear_radius: 0.500 INCHES NOMINAL IN, hole_diameter: 0.125 INCHES NOMINAL IN, body_thickness: 0.328 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-764-8300, 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
863D1
NSN: 5340-00-764-8300
FSC: 5340 — Hardware, Commercial
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
width2.875 INCHES NOMINAL IN
length3.875 INCHES NOMINAL IN
materialSTEEL
ear_radius0.500 INCHES NOMINAL IN
hole_diameter0.125 INCHES NOMINAL IN
body_thickness0.328 INCHES NOMINAL IN
securing_device_typeSPECIAL
end_item_identificationW/S: TRUCK, CARGO, DROPSIDE 2 1/2-TON 6X6 W/E
bolt_circle_hole_quantity4
cross-sectional_shape_styleFLAT W/OPEN CENTER
mounting_opening_shape_styleUNTHREADED HOLE
distance_between_holes_along_width2.125 INCHES NOMINAL IN
NSN5340-00-764-8300
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 863D1 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
•
LENGTH: 3.875 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLES ALONG LENGTH: 2.875 INCHES NOMINAL IN
•
BOLT CIRCLE HOLE QUANTITY: 4
•
DISTANCE BETWEEN HOLES ALONG WIDTH: 2.125 INCHES NOMINAL IN
•
EAR RADIUS: 0.500 INCHES NOMINAL IN
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: SA E1008-1020 ASSN STD SINGLE MATERIAL RESPONSE AND QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: FLAT W/OPEN CENTER
TECHNICAL CHARACTERISTICS
LENGTH3.875 INCHES NOMINAL IN
DISTANCE BETWEEN HOLES ALONG LENGTH2.875 INCHES NOMINAL IN
BOLT CIRCLE HOLE QUANTITY4
DISTANCE BETWEEN HOLES ALONG WIDTH2.125 INCHES NOMINAL IN
EAR RADIUS0.500 INCHES NOMINAL IN
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
MATERIAL DOCUMENT AND CLASSIFICATIONSA E1008-1020 ASSN STD SINGLE MATERIAL RESPONSE AND QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLEFLAT W/OPEN CENTER
SECURING DEVICE TYPESPECIAL
WIDTH2.875 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
1107C81Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
913765Reference 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 863D1?
863D1 is a COVER,ACCESS.
What parts can replace 863D1?
There are 2 known substitutes for 863D1: 1107C81, 913765. Substitute compatibility should be verified for your specific system.
What is the NSN for 863D1?
863D1 is cataloged in the U.S. Government catalog under NSN 5340-00-764-8300. 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.