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91030A033 — NUT,PLAIN,EXTENDED WASHER,HEXAGO

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

91030A033: NUT,PLAIN,EXTENDED WASHER,HEXAGO.

NUT,PLAIN,EXTENDED WASHER,HEXAGO. Key specifications include material: STEEL COMP 12L14 OVERALL, nut_style: HEXAGON, overall_height: 0.688 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, washer_thickness: 0.156 INCHES NOMINAL IN, surface_treatment: OXIDE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-533-9640, 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
91030A033
NSN: 5310-01-533-9640
FSC: 5310 — Nuts and Washers
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL COMP 12L14 OVERALL
nut_styleHEXAGON
overall_height0.688 INCHES NOMINAL IN
thread_directionRIGHT-HAND
washer_thickness0.156 INCHES NOMINAL IN
surface_treatmentOXIDE OVERALL
width_across_flats1.875 INCHES NOMINAL IN
end_item_identificationPART OF WHEEL HOUSING ARMOR KIT 2540-01-533-8810; NHA NSN M915A3 ARMOR KIT 2540-01-523-1336; USED ON ARMORED VERSION OF M915A3 2320-01-523-2486
washer_outside_diameter1.125 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyFLANGE NUT,CASE HARDENED STEEL
NSN5310-01-533-9640
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91030A033 · 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
•
WASHER OUTSIDE DIAMETER: 1.125 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 1.875 INCHES NOMINAL IN
•
WASHER THICKNESS: 0.156 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
SURFACE TREATMENT: OXIDE OVERALL
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.688 INCHES NOMINAL IN
WASHER OUTSIDE DIAMETER1.125 INCHES NOMINAL IN
WIDTH ACROSS FLATS1.875 INCHES NOMINAL IN
WASHER THICKNESS0.156 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTOXIDE OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYFLANGE NUT,CASE HARDENED STEEL
NUT STYLEHEXAGON
END ITEM IDENTIFICATIONPART OF WHEEL HOUSING ARMOR KIT 2540-01-533-8810; NHA NSN M915A3 ARMOR KIT 2540-01-523-1336; USED ON ARMORED VERSION OF M915A3 2320-01-523-2486
MATERIALSTEEL COMP 12L14 OVERALL
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 91030A033?
91030A033 is a NUT,PLAIN,EXTENDED WASHER,HEXAGO.
What is the NSN for 91030A033?
91030A033 is cataloged in the U.S. Government catalog under NSN 5310-01-533-9640. 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.