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PartsTable / COMPONENT / 12Z2020-408
12Z2020-408 ✓ 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 NUT,SHEET SPRING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1060 OVERALL, nut_style: SHEET SPRING, nut_width: 0.531 INCHES NOMINAL IN, nut_length: 1.375 INCHES NOMINAL IN, surface_treatment: ZINC OVERALL, material_thickness: 0.017 INCHES NOMINAL 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 5310-00-208-2542, 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
12Z2020-408
NSN: 5310-00-208-2542
FSC: 5310
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL COMP 1060 OVERALL
nut_styleSHEET SPRING
nut_width0.531 INCHES NOMINAL IN
nut_length1.375 INCHES NOMINAL IN
surface_treatmentZINC OVERALL
material_thickness0.017 INCHES NOMINAL IN
nondefinitive_spec/std_data1 TYPE
mating_member_diameter_accommodated0.164 INCHES NOMINAL IN
material_document_and_classificationMIL-S-16788 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-208-2542
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12Z2020-408 · 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
•
NUT STYLE: SHEET SPRING
•
MATERIAL: STEEL COMP 1060 OVERALL
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE
•
NUT WIDTH: 0.531 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-16788 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: ZINC OVERALL
•
MATING MEMBER DIAMETER ACCOMMODATED: 0.164 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.017 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLESHEET SPRING
MATERIALSTEEL COMP 1060 OVERALL
NONDEFINITIVE SPEC/STD DATA1 TYPE
NUT WIDTH0.531 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-16788 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTZINC OVERALL
MATING MEMBER DIAMETER ACCOMMODATED0.164 INCHES NOMINAL IN
MATERIAL THICKNESS0.017 INCHES NOMINAL IN
NUT LENGTH1.375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
10579Interchangeable
interchangeable cross-reference
interchangeable
MILN3337TYPE1Interchangeable
interchangeable cross-reference
interchangeable
C8016-832-1Interchangeable
interchangeable cross-reference
interchangeable
12Z2040PC404Interchangeable
interchangeable cross-reference
interchangeable
C410-632-3Interchangeable
interchangeable cross-reference
interchangeable
1136203Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12Z2020-408?
12Z2020-408 is a NUT,SHEET SPRING.
What parts can replace 12Z2020-408?
There are 7 known substitutes for 12Z2020-408: 10579, MILN3337TYPE1, C8016-832-1 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12Z2020-408?
12Z2020-408 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-208-2542. 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