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PartsTable / COMPONENT / 12Z3018-54
12Z3018-54 ✓ 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. Key specifications include material: STEEL COMP 410 OVERALL, hole_diameter: 0.319 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN, outside_diameter: 0.575 INCHES NOMINAL IN, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: PASSIVATE OVERALL, material_thickness: 0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-261-7415, 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
12Z3018-54
NSN: 5310-00-261-7415
FSC: 5310
CAGE: 94135 — NAVAL ORDNANCE STANDARDS (USA)
SPECIFICATIONS
materialSTEEL COMP 410 OVERALL
hole_diameter0.319 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
outside_diameter0.575 INCHES NOMINAL IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentPASSIVATE OVERALL
material_thickness0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
departure_from_cited_designatorAS MODIFIED BY MATERIAL
material_document_and_classificationQQ-S-766,CLASS 3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-261-7415
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12Z3018-54 · 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
KEY FEATURES
•
MATERIAL THICKNESS: 0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 410 OVERALL
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
DEPARTURE FROM CITED DESIGNATOR: AS MODIFIED BY MATERIAL
•
HOLE DIAMETER: 0.319 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-766,CLASS 3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.575 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL THICKNESS0.056 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
MATERIALSTEEL COMP 410 OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
DEPARTURE FROM CITED DESIGNATORAS MODIFIED BY MATERIAL
HOLE DIAMETER0.319 INCHES MINIMUM AND 0.333 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766,CLASS 3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.575 INCHES NOMINAL IN
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
LW532Interchangeable
interchangeable cross-reference
interchangeable
102550Interchangeable
interchangeable cross-reference
interchangeable
AS122058Interchangeable
interchangeable cross-reference
interchangeable
414908PC114Interchangeable
Same NIIN cross-reference
interchangeable
AN935-516LInterchangeable
Same NIIN cross-reference
interchangeable
935C516LInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12Z3018-54?
12Z3018-54 is a WASHER,LOCK.
What parts can replace 12Z3018-54?
There are 6 known substitutes for 12Z3018-54: LW532, 102550, AS122058 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12Z3018-54?
12Z3018-54 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-261-7415. 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