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306541 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

306541: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY, hole_diameter: 0.281 INCHES NOMINAL IN, body_thickness: 0.125 INCHES NOMINAL IN, inside_diameter: 3.750 INCHES NOMINAL IN, flange_thickness: 0.125 INCHES NOMINAL IN, outside_diameter: 5.375 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-312-0445, 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
306541
NSN: 5340-00-312-0445
FSC: 5340 — Hardware, Commercial
CAGE: 1DF03 — ABM EQUIPMENT, LLC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY
hole_diameter0.281 INCHES NOMINAL IN
body_thickness0.125 INCHES NOMINAL IN
inside_diameter3.750 INCHES NOMINAL IN
flange_thickness0.125 INCHES NOMINAL IN
outside_diameter5.375 INCHES NOMINAL IN
features_providedSEALING CAPABILITY
surface_treatmentANODIZE
bolt_circle_diameter4.719 INCHES MINIMUM AND 4.781 INCHES MAXIMUM IN
fsc_application_dataAXLE,VEHICULAR,NONDRIVING
inside_corner_radius0.375 INCHES NOMINAL IN
securing_device_typeTHREADED FASTENER
NSN5340-00-312-0445
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 306541 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
•
FSC APPLICATION DATA: AXLE,VEHICULAR,NONDRIVING
•
FLANGE THICKNESS: 0.125 INCHES NOMINAL IN
•
BOLT CIRCLE HOLE QUANTITY: 4
•
INSIDE CORNER RADIUS: 0.375 INCHES NOMINAL IN
•
FIRST RECESS INSIDE HEIGHT: 1.750 INCHES NOMINAL IN
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
•
CROSS-SECTIONAL SHAPE STYLE: CIRCULAR RECESS
•
OUTSIDE DIAMETER: 5.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATAAXLE,VEHICULAR,NONDRIVING
FLANGE THICKNESS0.125 INCHES NOMINAL IN
BOLT CIRCLE HOLE QUANTITY4
INSIDE CORNER RADIUS0.375 INCHES NOMINAL IN
FIRST RECESS INSIDE HEIGHT1.750 INCHES NOMINAL IN
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
CROSS-SECTIONAL SHAPE STYLECIRCULAR RECESS
OUTSIDE DIAMETER5.375 INCHES NOMINAL IN
FEATURES PROVIDEDSEALING CAPABILITY
SECURING DEVICE TYPETHREADED FASTENER
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 306541?
306541 is a COVER,ACCESS.
What is the NSN for 306541?
306541 is cataloged in the U.S. Government catalog under NSN 5340-00-312-0445. 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.