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Technical Data Sheet
PartsTable / COMPONENT / 4864281 ITEM 20
4864281 ITEM 20 ✓ 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,LOCK is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-933-8118, 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
4864281 ITEM 20
NSN: 5310-00-933-8118
FSC: 5310
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
Part Number4864281 ITEM 20
NSN5310-00-933-8118
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4864281 ITEM 20 · 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 33
140266Interchangeable
interchangeable cross-reference
interchangeable
503A1-3-70Interchangeable
interchangeable cross-reference
interchangeable
310027800Interchangeable
interchangeable cross-reference
interchangeable
26769Interchangeable
interchangeable cross-reference
interchangeable
140078Interchangeable
interchangeable cross-reference
interchangeable
200/IF-120VInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4864281 ITEM 20?
4864281 ITEM 20 is a WASHER,LOCK.
What parts can replace 4864281 ITEM 20?
There are 33 known substitutes for 4864281 ITEM 20: 140266, 503A1-3-70, 310027800 and 30 more. Substitute compatibility should be verified for your specific system.
Is 4864281 ITEM 20 still available?
4864281 ITEM 20 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026