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U540156 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

U540156: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include length: 2.625 INCHES NOMINAL IN, material: ALUMINUM ALLOY 6061, surface_treatment: CHROMATE AND ENAMEL AND PRIMER, peripheral_shape_style: RECTANGLE, FOUR HOLES. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-374-5986, 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
U540156
NSN: 5340-01-374-5986
FSC: 5340 — Hardware, Commercial
CAGE: 78943 — TRIUMPH THERMAL SYSTEMS, LLC (USA)
SPECIFICATIONS
length2.625 INCHES NOMINAL IN
materialALUMINUM ALLOY 6061
surface_treatmentCHROMATE AND ENAMEL AND PRIMER
peripheral_shape_styleRECTANGLE, FOUR HOLES
NSN5340-01-374-5986
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: U540156 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: 2.625 INCHES NOMINAL IN
•
SURFACE TREATMENT: CHROMATE AND ENAMEL AND PRIMER
•
PERIPHERAL SHAPE STYLE: RECTANGLE, FOUR HOLES
•
MATERIAL: ALUMINUM ALLOY 6061
TECHNICAL CHARACTERISTICS
LENGTH2.625 INCHES NOMINAL IN
SURFACE TREATMENTCHROMATE AND ENAMEL AND PRIMER
PERIPHERAL SHAPE STYLERECTANGLE, FOUR HOLES
MATERIALALUMINUM ALLOY 6061
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
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is U540156?
U540156 is a COVER,ACCESS.
What is the NSN for U540156?
U540156 is cataloged in the U.S. Government catalog under NSN 5340-01-374-5986. 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.