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Technical Data Sheet
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21966 ✓ 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 PIN,STRAIGHT,HEADED is a the manufacturer industrial component. Key specifications include end_item_identification: WINCH, HYDRAULIC, part_name_assigned_by_controlling_agency: PLANET PIN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-020-0359, 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
21966
NSN: 5310-00-020-0359
FSC: 5310
CAGE: 03533 — CRANE CARRIER COMPANY, LLC (USA)
SPECIFICATIONS
end_item_identificationWINCH, HYDRAULIC
part_name_assigned_by_controlling_agencyPLANET PIN
NSN5310-00-020-0359
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 21966 · 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
MIL-M-15926 TY1Interchangeable
interchangeable cross-reference
interchangeable
MIL-M-15926Interchangeable
interchangeable cross-reference
interchangeable
336-CInterchangeable
interchangeable cross-reference
interchangeable
MIL-S-45180 TY1Interchangeable
interchangeable cross-reference
interchangeable
MIL-S-45180Interchangeable
interchangeable cross-reference
interchangeable
30510Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21966?
21966 is a PIN,STRAIGHT,HEADED.
What parts can replace 21966?
There are 21 known substitutes for 21966: MIL-M-15926 TY1, MIL-M-15926, 336-C and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21966?
21966 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-020-0359. 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