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5121343 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

5121343: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 4.313 INCHES NOMINAL IN, length: 5.156 INCHES NOMINAL IN, material: STEEL, ear_radius: 0.625 INCHES NOMINAL IN, inside_width: 2.750 INCHES NOMINAL IN, hole_diameter: 0.406 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-922-2018, 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
5121343
NSN: 5340-00-922-2018
FSC: 5340 — Hardware, Commercial
CAGE: 72582 — ROLLS-ROYCE SOLUTIONS AMERICA INC (USA)
SPECIFICATIONS
width4.313 INCHES NOMINAL IN
length5.156 INCHES NOMINAL IN
materialSTEEL
ear_radius0.625 INCHES NOMINAL IN
inside_width2.750 INCHES NOMINAL IN
hole_diameter0.406 INCHES NOMINAL IN
inside_length3.000 INCHES NOMINAL IN
body_thickness0.080 INCHES NOMINAL IN
securing_device_typeTHREADED FASTENER
bolt_circle_hole_quantity4
hole_quantity_along_width2
first_recess_inside_height0.375 INCHES NOMINAL IN
NSN5340-00-922-2018
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 5121343 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
•
INSIDE WIDTH: 2.750 INCHES NOMINAL IN
•
LENGTH: 5.156 INCHES NOMINAL IN
•
INSIDE LENGTH: 3.000 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLES ALONG LENGTH: 4.000 INCHES NOMINAL IN
•
BOLT CIRCLE HOLE QUANTITY: 4
•
FIRST RECESS INSIDE HEIGHT: 0.375 INCHES NOMINAL IN
•
HOLE QUANTITY ALONG LENGTH: 2
•
DISTANCE BETWEEN HOLES ALONG WIDTH: 2.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
INSIDE WIDTH2.750 INCHES NOMINAL IN
LENGTH5.156 INCHES NOMINAL IN
INSIDE LENGTH3.000 INCHES NOMINAL IN
DISTANCE BETWEEN HOLES ALONG LENGTH4.000 INCHES NOMINAL IN
BOLT CIRCLE HOLE QUANTITY4
FIRST RECESS INSIDE HEIGHT0.375 INCHES NOMINAL IN
HOLE QUANTITY ALONG LENGTH2
DISTANCE BETWEEN HOLES ALONG WIDTH2.750 INCHES NOMINAL IN
EAR RADIUS0.625 INCHES NOMINAL IN
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
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
PC5121343Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 5121343?
5121343 is a COVER,ACCESS.
What parts can replace 5121343?
There is 1 known substitute for 5121343: PC5121343. Substitute compatibility should be verified for your specific system.
What is the NSN for 5121343?
5121343 is cataloged in the U.S. Government catalog under NSN 5340-00-922-2018. 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.