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91831A004 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

91831A004: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING NUT, nut_style: HEXAGON, nut_height: 0.14 INCHES NOMINAL IN, temp_rating: 220.0 FAHRENHEIT NOMINAL DEGF, thread_series: UNIFIED NATIONAL COARSE (UNC), locking_feature: NYLON INSERT. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-658-9599, 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
91831A004
NSN: 5310-01-658-9599
FSC: 5310 — Nuts and Washers
CAGE: 97852 — STAR STAINLESS SCREW CO (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING NUT
nut_styleHEXAGON
nut_height0.14 INCHES NOMINAL IN
temp_rating220.0 FAHRENHEIT NOMINAL DEGF
thread_seriesUNIFIED NATIONAL COARSE (UNC)
locking_featureNYLON INSERT
thread_directionRIGHT-HAND
width_across_flats0.25 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencySTAINLESS STEEL NYLON-INSERT LOCKNUT
NSN5310-01-658-9599
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91831A004 · 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: 0.25 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
TEMP RATING: 220.0 FAHRENHEIT NOMINAL DEGF
•
THREAD DIRECTION: RIGHT-HAND
•
LOCKING FEATURE: NYLON INSERT
•
NUT HEIGHT: 0.14 INCHES NOMINAL IN
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.25 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
TEMP RATING220.0 FAHRENHEIT NOMINAL DEGF
THREAD DIRECTIONRIGHT-HAND
LOCKING FEATURENYLON INSERT
NUT HEIGHT0.14 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYSTAINLESS STEEL NYLON-INSERT LOCKNUT
NUT STYLEHEXAGON
MATERIALSTEEL CORROSION RESISTING 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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 91831A004?
91831A004 is a NUT,SELF-LOCKING,HEXAGON.
What is the NSN for 91831A004?
91831A004 is cataloged in the U.S. Government catalog under NSN 5310-01-658-9599. 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.