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40254-3 — COUPLING ASSEMBLY,TUBE,FLEXIBLE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

40254-3: COUPLING ASSEMBLY,TUBE,FLEXIBLE.

COUPLING ASSEMBLY,TUBE,FLEXIBLE. Key specifications include special_features: TOP COUNTER COVER SCREW 0.250 (1/4) INCH, COMPONENT OF THE COUNTER COVER ASSEMBLY P/N: 402544.. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-028-4776, 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
40254-3
NSN: 5315-01-028-4776
NIINs: 010284776, 013248567, 016503854
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 06KW9 — LUCENT TECHNOLOGIES INC DBA FEDERAL MARKETING GROUP (USA)
SPECIFICATIONS
special_featuresTOP COUNTER COVER SCREW 0.250 (1/4) INCH, COMPONENT OF THE COUNTER COVER ASSEMBLY P/N: 402544.
NSN5315-01-028-4776
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 40254-3 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SHANK DIAMETER: 0.245 INCHES NOMINAL IN
•
SECOND SHANK DIAMETER: 0.138 INCHES NOMINAL IN
•
FIRST END TAPER LENGTH: 0.312 INCHES NOMINAL IN
•
FIRST END LOCATION: CHAMFERED END
•
THREAD LENGTH: 0.187 INCHES NOMINAL IN
•
FIRST END STYLE: CHAMFERED
•
SHANK LENGTH: 0.718 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SHOULDER
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.245 INCHES NOMINAL IN
SECOND SHANK DIAMETER0.138 INCHES NOMINAL IN
FIRST END TAPER LENGTH0.312 INCHES NOMINAL IN
FIRST END LOCATIONCHAMFERED END
THREAD LENGTH0.187 INCHES NOMINAL IN
FIRST END STYLECHAMFERED
SHANK LENGTH0.718 INCHES NOMINAL IN
STYLE DESIGNATORSHOULDER
OVERALL LENGTH1.880 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDNOT IDENTICAL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 40254-3?
40254-3 is a COUPLING ASSEMBLY,TUBE,FLEXIBLE.
What is the NSN for 40254-3?
40254-3 is cataloged in the U.S. Government catalog under NSN 5315-01-028-4776. 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.