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Technical Data Sheet
PartsTable / COMPONENT / 91100A180
91100A180 ✓ 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 WASHER,FLAT 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 5310-01-559-0806, 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
91100A180
NSN: 5310-01-559-0806
FSC: 5310
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
Part Number91100A180
NSN5310-01-559-0806
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91100A180 · 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 20
25923Interchangeable
interchangeable cross-reference
interchangeable
33471Interchangeable
interchangeable cross-reference
interchangeable
25923DInterchangeable
interchangeable cross-reference
interchangeable
14-25923Interchangeable
interchangeable cross-reference
interchangeable
6211CE1TX9Interchangeable
interchangeable cross-reference
interchangeable
00213-0206Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 91100A180?
91100A180 is a WASHER,FLAT.
What parts can replace 91100A180?
There are 20 known substitutes for 91100A180: 25923, 33471, 25923D and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 91100A180?
91100A180 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-559-0806. 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