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H50540-5 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

H50540-5: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.400 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-154-2602, 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
H50540-5
NSN: 5310-01-154-2602
FSC: 5310 — Nuts and Washers
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.400 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
surface_treatmentSILVER THREADS
width_across_flats0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
nominal_thread_size0.313 INCHES IN
bearing_surface_typeCHAMFERED
counterbore_diameter0.335 INCHES MINIMUM AND 0.345 INCHES MAXIMUM OVERALL IN
NSN5310-01-154-2602
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: H50540-5 · 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: 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS2411 ASSN STD SINGLE TREATMENT RESPONSE THREADS
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
NUT COUNTERBORE DEPTH: 0.050 INCHES MINIMUM AND 0.060 INCHES MAXIMUM OVERALL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.313 INCHES IN
•
COUNTERBORE DIAMETER: 0.335 INCHES MINIMUM AND 0.345 INCHES MAXIMUM OVERALL IN
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS2411 ASSN STD SINGLE TREATMENT RESPONSE THREADS
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
NUT COUNTERBORE DEPTH0.050 INCHES MINIMUM AND 0.060 INCHES MAXIMUM OVERALL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.313 INCHES IN
COUNTERBORE DIAMETER0.335 INCHES MINIMUM AND 0.345 INCHES MAXIMUM OVERALL IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT0.400 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN
SURFACE TREATMENTSILVER THREADS
SUBSTITUTES & CROSS-REFERENCES 4
E12293-5Reference document
Same NSN cross-reference
Reference document — Secondary reference
10109837Reference document
Same NSN cross-reference
Reference document — Informative reference only
3020T63Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
UN1301W054-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 H50540-5?
H50540-5 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace H50540-5?
There are 4 known substitutes for H50540-5: E12293-5, 10109837, 3020T63 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H50540-5?
H50540-5 is cataloged in the U.S. Government catalog under NSN 5310-01-154-2602. 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.