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90621A038 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

90621A038: 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: 1.125 INCHES NOMINAL IN, temp_rating: 750.0 FAHRENHEIT MAXIMUM DEGF, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC). This part is cataloged in the U.S.

Government catalog under NSN 5310-01-495-7627, 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
90621A038
NSN: 5310-01-495-7627
FSC: 5310 — Nuts and Washers
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height1.125 INCHES NOMINAL IN
temp_rating750.0 FAHRENHEIT MAXIMUM DEGF
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
locking_featurePREVAILING TORQUE WITH METALLIC INSERT
special_featuresDRAWING CALLS THIS: NUT, LOCK
thread_directionRIGHT-HAND
width_across_flats1.625 INCHES NOMINAL IN
nominal_thread_size1.000 INCHES IN
bearing_surface_typeCHAMFERED
NSN5310-01-495-7627
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 90621A038 · 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: 1.625 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
TEMP RATING: 750.0 FAHRENHEIT MAXIMUM DEGF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.000 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE WITH METALLIC INSERT
•
NUT HEIGHT: 1.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.625 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
TEMP RATING750.0 FAHRENHEIT MAXIMUM DEGF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.000 INCHES IN
LOCKING FEATUREPREVAILING TORQUE WITH METALLIC INSERT
NUT HEIGHT1.125 INCHES NOMINAL IN
SPECIAL FEATURESDRAWING CALLS THIS: NUT, LOCK
NUT STYLEHEXAGON
THREAD CLASS2B
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 90621A038?
90621A038 is a NUT,SELF-LOCKING,HEXAGON.
What is the NSN for 90621A038?
90621A038 is cataloged in the U.S. Government catalog under NSN 5310-01-495-7627. 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.