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91102A038 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

91102A038: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 1.024 INCHES NOMINAL IN, hardness_rating: 38.0 ROCKWELL C NOMINAL, outside_diameter: 1.656 INCHES NOMINAL IN, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: ZINC OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-488-4371, 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
91102A038
NSN: 5310-01-488-4371
FSC: 5310 — Nuts and Washers
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter1.024 INCHES NOMINAL IN
hardness_rating38.0 ROCKWELL C NOMINAL
outside_diameter1.656 INCHES NOMINAL IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentZINC OVERALL
material_thickness0.250 INCHES NOMINAL IN
end_item_identificationMRAP BUFFALO MK2A2
NSN5310-01-488-4371
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91102A038 · 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
•
HARDNESS RATING: 38.0 ROCKWELL C NOMINAL
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
•
OUTSIDE DIAMETER: 1.656 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.250 INCHES NOMINAL IN
•
SURFACE TREATMENT: ZINC OVERALL
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 1.024 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HARDNESS RATING38.0 ROCKWELL C NOMINAL
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
OUTSIDE DIAMETER1.656 INCHES NOMINAL IN
MATERIAL THICKNESS0.250 INCHES NOMINAL IN
SURFACE TREATMENTZINC OVERALL
END ITEM IDENTIFICATIONMRAP BUFFALO MK2A2
MATERIALSTEEL OVERALL
HOLE DIAMETER1.024 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
4322603Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 91102A038?
91102A038 is a WASHER,LOCK.
What parts can replace 91102A038?
There is 1 known substitute for 91102A038: 4322603. Substitute compatibility should be verified for your specific system.
What is the NSN for 91102A038?
91102A038 is cataloged in the U.S. Government catalog under NSN 5310-01-488-4371. 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.