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Technical Data Sheet
PartsTable / COMPONENT / Y42
Y42 ✓ 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 5310-00-003-4094, 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
Y42
NSN: 5310-00-003-4094
FSC: 5310
CAGE: 27554 — WILDFIRE PACIFIC INC (USA)
SPECIFICATIONS
Part NumberY42
NSN5310-00-003-4094
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: Y42 · 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
103323Interchangeable
interchangeable cross-reference
interchangeable
1-2MInterchangeable
interchangeable cross-reference
interchangeable
XX002-0695Interchangeable
interchangeable cross-reference
interchangeable
10505769Interchangeable
interchangeable cross-reference
interchangeable
Z09378423Interchangeable
interchangeable cross-reference
interchangeable
78423Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is Y42?
Y42 is a WASHER,LOCK.
What parts can replace Y42?
There are 21 known substitutes for Y42: 103323, 1-2M, XX002-0695 and 18 more. Substitute compatibility should be verified for your specific system.
Is Y42 still available?
Y42 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