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Technical Data Sheet
PartsTable / COMPONENT / 21677-1060
21677-1060 ✓ 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 5310-01-552-4478, 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
21677-1060
NSN: 5310-01-552-4478
FSC: 5310
CAGE: 11871 — RECON/OPTICAL, INC. (USA)
SPECIFICATIONS
Part Number21677-1060
NSN5310-01-552-4478
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 21677-1060 · 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 3
1005476Interchangeable
interchangeable cross-reference
interchangeable
1686Interchangeable
interchangeable cross-reference
interchangeable
21677-1060-013Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21677-1060?
21677-1060 is a NUT,PLAIN,HEXAGON.
What parts can replace 21677-1060?
There are 3 known substitutes for 21677-1060: 1005476, 1686, 21677-1060-013. Substitute compatibility should be verified for your specific system.
What is the NSN for 21677-1060?
21677-1060 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-552-4478. 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