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90640A145 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

90640A145: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL NUT, nut_height: 0.344 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, surface_treatment: ZINC NUT, width_across_flats: 0.500 INCHES NOMINAL IN, nominal_thread_size: 0.312 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-534-4600, 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
90640A145
NSN: 5310-01-534-4600
FSC: 5310 — Nuts and Washers
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL NUT
nut_height0.344 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentZINC NUT
width_across_flats0.500 INCHES NOMINAL IN
nominal_thread_size0.312 INCHES IN
end_item_identification5340-01-487-7760
thread_quantity_per_inch24
NSN5310-01-534-4600
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 90640A145 · 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: 0.500 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.312 INCHES IN
•
NUT HEIGHT: 0.344 INCHES NOMINAL IN
•
SURFACE TREATMENT: ZINC NUT
•
THREAD QUANTITY PER INCH: 24
•
MATERIAL: STEEL NUT
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.500 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.312 INCHES IN
NUT HEIGHT0.344 INCHES NOMINAL IN
SURFACE TREATMENTZINC NUT
END ITEM IDENTIFICATION5340-01-487-7760
THREAD QUANTITY PER INCH24
MATERIALSTEEL NUT
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 90640A145?
90640A145 is a NUT,SELF-LOCKING,HEXAGON.
What is the NSN for 90640A145?
90640A145 is cataloged in the U.S. Government catalog under NSN 5310-01-534-4600. 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.