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Technical Data Sheet
PartsTable / COMPONENT / 91100A170
91100A170 ✓ 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 5310-01-553-7188, 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
91100A170
NSN: 5310-01-553-7188
FSC: 5310
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
Part Number91100A170
NSN5310-01-553-7188
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91100A170 · 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 14
24975Interchangeable
interchangeable cross-reference
interchangeable
10106553Interchangeable
interchangeable cross-reference
interchangeable
42312D187Interchangeable
interchangeable cross-reference
interchangeable
91100A180Interchangeable
interchangeable cross-reference
interchangeable
L149021Interchangeable
interchangeable cross-reference
interchangeable
L149021-12Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 91100A170?
91100A170 is a WASHER,FLAT.
What parts can replace 91100A170?
There are 14 known substitutes for 91100A170: 24975, 10106553, 42312D187 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 91100A170?
91100A170 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-553-7188. 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