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12387381-39 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

12387381-39: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, outside_diameter: 0.625 INCHES NOMINAL IN, part_name_assigned_by_controlling_agency: WASHER, LOCK, surface_treatment_document_and_classification: MIL-STD-171 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-682-6108, 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
12387381-39
NSN: 5310-01-682-6108
FSC: 5310 — Nuts and Washers
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL OVERALL
outside_diameter0.625 INCHES NOMINAL IN
special_featuresNHA:11-1-9750, HARNESS SINGLE POINT RELEASE,E THREAD BARTACK 42PSI, F THREAD TYPE 301, 7 TO 11 PSI ALL STICHING WILL CONFORM TO ASTM D6193
part_name_assigned_by_controlling_agencyWASHER, LOCK
surface_treatment_document_and_classificationMIL-STD-171 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-682-6108
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12387381-39 · 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-STD-171 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.625 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-STD-171 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
OUTSIDE DIAMETER0.625 INCHES NOMINAL IN
SPECIAL FEATURESNHA:11-1-9750, HARNESS SINGLE POINT RELEASE,E THREAD BARTACK 42PSI, F THREAD TYPE 301, 7 TO 11 PSI ALL STICHING WILL CONFORM TO ASTM D6193
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER, LOCK
MATERIALSTEEL 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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 12387381-39?
12387381-39 is a WASHER,LOCK.
What is the NSN for 12387381-39?
12387381-39 is cataloged in the U.S. Government catalog under NSN 5310-01-682-6108. 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.