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107003-256 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

107003-256: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, hole_diameter: 0.142 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN, outside_diameter: 0.278 INCHES MINIMUM AND 0.288 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, surface_treatment: NICKEL OVERALL, material_thickness: 0.018 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-407-2187, 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
107003-256
NSN: 5310-00-407-2187
FSC: 5310 — Nuts and Washers
CAGE: 37695 — RAYTHEON COMPANY (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
hole_diameter0.142 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
outside_diameter0.278 INCHES MINIMUM AND 0.288 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
surface_treatmentNICKEL OVERALL
material_thickness0.018 INCHES NOMINAL IN
surface_treatment_document_and_classificationQQ-N-290 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-407-2187
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 107003-256 · 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: QQ-N-290 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
OUTSIDE DIAMETER: 0.278 INCHES MINIMUM AND 0.288 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.018 INCHES NOMINAL IN
•
SURFACE TREATMENT: NICKEL OVERALL
•
MATERIAL: COPPER ALLOY OVERALL
•
HOLE DIAMETER: 0.142 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-N-290 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORFLAT INTERNAL TEETH
OUTSIDE DIAMETER0.278 INCHES MINIMUM AND 0.288 INCHES MAXIMUM IN
MATERIAL THICKNESS0.018 INCHES NOMINAL IN
SURFACE TREATMENTNICKEL OVERALL
MATERIALCOPPER ALLOY OVERALL
HOLE DIAMETER0.142 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
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 107003-256?
107003-256 is a WASHER,LOCK.
What is the NSN for 107003-256?
107003-256 is cataloged in the U.S. Government catalog under NSN 5310-00-407-2187. 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.