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PartsTable / COMPONENT / A02157-129
A02157-129 ✓ 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 OVERALL, hole_diameter: 0.640 INCHES MINIMUM AND 0.659 INCHES MAXIMUM IN, hardness_rating: 82.5 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 84.5 ROCKWELL SUPERFICIAL 15-N MAXIMUM, outside_diameter: 1.053 INCHES MINIMUM AND 1.071 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, surface_treatment: CADMIUM OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-847-3940, 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
A02157-129
NSN: 5310-00-847-3940
FSC: 5310
CAGE: 77926 — ROSEN RAYMOND AND CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.640 INCHES MINIMUM AND 0.659 INCHES MAXIMUM IN
hardness_rating82.5 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 84.5 ROCKWELL SUPERFICIAL 15-N MAXIMUM
outside_diameter1.053 INCHES MINIMUM AND 1.071 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
surface_treatmentCADMIUM OVERALL
material_thickness0.043 INCHES MINIMUM AND 0.047 INCHES MAXIMUM IN
surface_treatment_document_and_classificationQQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-847-3940
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A02157-129 · 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
•
SURFACE TREATMENT: CADMIUM OVERALL
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.053 INCHES MINIMUM AND 1.071 INCHES MAXIMUM IN
•
HARDNESS RATING: 82.5 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 84.5 ROCKWELL SUPERFICIAL 15-N MAXIMUM
•
HOLE DIAMETER: 0.640 INCHES MINIMUM AND 0.659 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.043 INCHES MINIMUM AND 0.047 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTCADMIUM OVERALL
MATERIALSTEEL OVERALL
STYLE DESIGNATORFLAT INTERNAL TEETH
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
OUTSIDE DIAMETER1.053 INCHES MINIMUM AND 1.071 INCHES MAXIMUM IN
HARDNESS RATING82.5 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 84.5 ROCKWELL SUPERFICIAL 15-N MAXIMUM
HOLE DIAMETER0.640 INCHES MINIMUM AND 0.659 INCHES MAXIMUM IN
MATERIAL THICKNESS0.043 INCHES MINIMUM AND 0.047 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
1224Interchangeable
interchangeable cross-reference
interchangeable
1229G423Interchangeable
interchangeable cross-reference
interchangeable
115551Interchangeable
interchangeable cross-reference
interchangeable
5310PL0652572Interchangeable
interchangeable cross-reference
interchangeable
MS35333-33Interchangeable
interchangeable cross-reference
interchangeable
MILW6986Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A02157-129?
A02157-129 is a WASHER,LOCK.
What parts can replace A02157-129?
There are 25 known substitutes for A02157-129: 1224, 1229G423, 115551 and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A02157-129?
A02157-129 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-847-3940. 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