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Technical Data Sheet
PartsTable / COMPONENT / 12Z3042-56
12Z3042-56 ✓ 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 5310-00-209-5116, 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
12Z3042-56
NSN: 5310-00-209-5116
FSC: 5310
CAGE: 94135 — NAVAL ORDNANCE STANDARDS (USA)
SPECIFICATIONS
Part Number12Z3042-56
NSN5310-00-209-5116
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12Z3042-56 · 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
135629Interchangeable
interchangeable cross-reference
interchangeable
1229V515Interchangeable
interchangeable cross-reference
interchangeable
939WES4Interchangeable
interchangeable cross-reference
interchangeable
5164004-00Interchangeable
interchangeable cross-reference
interchangeable
MS35335-57Interchangeable
interchangeable cross-reference
interchangeable
69778Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12Z3042-56?
12Z3042-56 is a WASHER,LOCK.
What parts can replace 12Z3042-56?
There are 21 known substitutes for 12Z3042-56: 135629, 1229V515, 939WES4 and 18 more. Substitute compatibility should be verified for your specific system.
Is 12Z3042-56 still available?
12Z3042-56 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