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0639031001 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

0639031001: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OVERALL, hardness_rating: 34.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM38.0 ROCKWELL C MAXIMUM, surface_treatment: OXIDE OVERALL, material_document_and_classification: MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL, surface_treatment_document_and_classification: MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-066-4901, 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
0639031001
NSN: 5310-01-066-4901
FSC: 5310 — Nuts and Washers
CAGE: D8124 — ZF FRIEDRICHSHAFEN AG (DEU)
SPECIFICATIONS
materialSTEEL COMP 4130 OVERALL
hardness_rating34.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM38.0 ROCKWELL C MAXIMUM
surface_treatmentOXIDE OVERALL
material_document_and_classificationMIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-066-4901
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 0639031001 · 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 DOCUMENT AND CLASSIFICATION: MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
HARDNESS RATING: 34.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM38.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: OXIDE OVERALL
•
MATERIAL: STEEL COMP 4130 OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING34.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM38.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTOXIDE OVERALL
MATERIALSTEEL COMP 4130 OVERALL
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 0639031001?
0639031001 is a WASHER,LOCK.
What is the NSN for 0639031001?
0639031001 is cataloged in the U.S. Government catalog under NSN 5310-01-066-4901. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.