PartsTable
Technical Data Sheet
Download PDF

285001B — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

285001B: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 4.375 INCHES NOMINAL IN, length: 7.125 INCHES NOMINAL IN, material: STEEL, inside_width: 4.250 INCHES NOMINAL IN, corner_radius: 0.562 INCHES NOMINAL IN, hole_diameter: 0.406 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-786-2917, 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
285001B
NSN: 5340-00-786-2917
FSC: 5340 — Hardware, Commercial
CAGE: 28265 — HERCULES ENGINE CO INC (USA)
SPECIFICATIONS
width4.375 INCHES NOMINAL IN
length7.125 INCHES NOMINAL IN
materialSTEEL
inside_width4.250 INCHES NOMINAL IN
corner_radius0.562 INCHES NOMINAL IN
hole_diameter0.406 INCHES NOMINAL IN
inside_length7.000 INCHES NOMINAL IN
body_thickness0.062 INCHES NOMINAL IN
securing_device_typeTHREADED FASTENER
peripheral_shape_styleRECTANGLE, FOUR HOLES
first_recess_inside_height0.188 INCHES NOMINAL IN
cross-sectional_shape_styleSQUARE OR RECTANGULAR RECESS
NSN5340-00-786-2917
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 285001B 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: 0.562 INCHES NOMINAL IN
•
INSIDE WIDTH: 4.250 INCHES NOMINAL IN
•
CORNER RADIUS: 0.562 INCHES NOMINAL IN
•
LENGTH: 7.125 INCHES NOMINAL IN
•
INSIDE LENGTH: 7.000 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLES ALONG LENGTH: 4.312 INCHES NOMINAL IN
•
FIRST RECESS INSIDE HEIGHT: 0.188 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLES ALONG WIDTH: 3.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG WIDTH0.562 INCHES NOMINAL IN
INSIDE WIDTH4.250 INCHES NOMINAL IN
CORNER RADIUS0.562 INCHES NOMINAL IN
LENGTH7.125 INCHES NOMINAL IN
INSIDE LENGTH7.000 INCHES NOMINAL IN
DISTANCE BETWEEN HOLES ALONG LENGTH4.312 INCHES NOMINAL IN
FIRST RECESS INSIDE HEIGHT0.188 INCHES NOMINAL IN
DISTANCE BETWEEN HOLES ALONG WIDTH3.250 INCHES NOMINAL IN
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
CROSS-SECTIONAL SHAPE STYLESQUARE OR RECTANGULAR RECESS
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
255002AReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
Ready to buy 285001B?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 285001B?
285001B is a COVER,ACCESS.
What parts can replace 285001B?
There is 1 known substitute for 285001B: 255002A. Substitute compatibility should be verified for your specific system.
What is the NSN for 285001B?
285001B is cataloged in the U.S. Government catalog under NSN 5340-00-786-2917. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 285001B

✓ 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.