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PartsTable / COMPONENT / 28-90878
28-90878 ✓ 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 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 5310-01-170-8629, 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
28-90878
NSN: 5310-01-170-8629
FSC: 5310
CAGE: 81412 — TREADWELL CORPORATION (DELAWARE) DBA TREADWELL CORP (USA)
SPECIFICATIONS
Part Number28-90878
NSN5310-01-170-8629
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 28-90878 · 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 15
301 005Interchangeable
interchangeable cross-reference
interchangeable
32V 5A BU MBInterchangeable
interchangeable cross-reference
interchangeable
5920PL0975424Interchangeable
interchangeable cross-reference
interchangeable
GW10U636SC2Interchangeable
interchangeable cross-reference
interchangeable
FF-W-92BInterchangeable
interchangeable cross-reference
interchangeable
S1100-6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 28-90878?
28-90878 is a NUT,PLAIN.
What parts can replace 28-90878?
There are 15 known substitutes for 28-90878: 301 005, 32V 5A BU MB, 5920PL0975424 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 28-90878?
28-90878 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-170-8629. 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