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04-40166 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

04-40166: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: HEXAGON, nut_height: 0.297 INCHES NOMINAL IN, thread_series: UNIFIED NATIONAL COARSE (UNC), locking_feature: NYLON INSERT, special_features: KNOWN AS: LOCKNUT,NYLON INSERT, NONMARRING FLANGE, NHA: 04-40100, WASHER DIAMETER: 0.56. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-674-7438, 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
04-40166
NSN: 5310-01-674-7438
FSC: 5310 — Nuts and Washers
CAGE: 30554 — DEPARTMENT OF DEFENSE PROJECT MANAGER-MOBILE ELECTRIC POWER (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleHEXAGON
nut_height0.297 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
locking_featureNYLON INSERT
special_featuresKNOWN AS: LOCKNUT,NYLON INSERT, NONMARRING FLANGE, NHA: 04-40100, WASHER DIAMETER: 0.56
width_across_flats0.438 INCHES NOMINAL IN
nominal_thread_size0.25 INCHES IN
end_item_identification6115-016667896
thread_quantity_per_inch20
part_name_assigned_by_controlling_agencyNUT,SELF LOCKING,HEX
NSN5310-01-674-7438
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 04-40166 · 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
•
WIDTH ACROSS FLATS: 0.438 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD SIZE: 0.25 INCHES IN
•
LOCKING FEATURE: NYLON INSERT
•
NUT HEIGHT: 0.297 INCHES NOMINAL IN
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.438 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD SIZE0.25 INCHES IN
LOCKING FEATURENYLON INSERT
NUT HEIGHT0.297 INCHES NOMINAL IN
SPECIAL FEATURESKNOWN AS: LOCKNUT,NYLON INSERT, NONMARRING FLANGE, NHA: 04-40100, WASHER DIAMETER: 0.56
PART NAME ASSIGNED BY CONTROLLING AGENCYNUT,SELF LOCKING,HEX
NUT STYLEHEXAGON
END ITEM IDENTIFICATION6115-016667896
THREAD QUANTITY PER INCH20
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
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 04-40166?
04-40166 is a NUT,SELF-LOCKING,HEXAGON.
What is the NSN for 04-40166?
04-40166 is cataloged in the U.S. Government catalog under NSN 5310-01-674-7438. This indicates validated use in U.S. government and defense supply chains.
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