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PartsTable / COMPONENT / 90591A171
90591A171 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-554-5594, 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
90591A171
NSN: 5310-01-554-5594
FSC: 5310
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
Part Number90591A171
NSN5310-01-554-5594
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 90591A171 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
90591A151Interchangeable
interchangeable cross-reference
interchangeable
L140934-0608Interchangeable
interchangeable cross-reference
interchangeable
L140934Interchangeable
interchangeable cross-reference
interchangeable
L140934-1610Interchangeable
interchangeable cross-reference
interchangeable
L140934-1206Interchangeable
interchangeable cross-reference
interchangeable
29924Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 90591A171?
90591A171 is a NUT,PLAIN,HEXAGON.
What parts can replace 90591A171?
There are 21 known substitutes for 90591A171: 90591A151, L140934-0608, L140934 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 90591A171?
90591A171 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-554-5594. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026