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11503663 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

11503663: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include hole_diameter: 0.250 INCHES NOMINAL IN, outside_diameter: 0.500 INCHES NOMINAL IN, style_designator: FLAT EXTERNAL TEETH, surface_treatment: CADMIUM OR ZINC OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-159-1867, 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
11503663
NSN: 5310-01-159-1867
FSC: 5310 — Nuts and Washers
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)
SPECIFICATIONS
hole_diameter0.250 INCHES NOMINAL IN
outside_diameter0.500 INCHES NOMINAL IN
style_designatorFLAT EXTERNAL TEETH
surface_treatmentCADMIUM OR ZINC OVERALL
NSN5310-01-159-1867
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 11503663 · 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
•
STYLE DESIGNATOR: FLAT EXTERNAL TEETH
•
OUTSIDE DIAMETER: 0.500 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
HOLE DIAMETER: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORFLAT EXTERNAL TEETH
OUTSIDE DIAMETER0.500 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
HOLE DIAMETER0.250 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
121753Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 11503663?
11503663 is a WASHER,LOCK.
What parts can replace 11503663?
There is 1 known substitute for 11503663: 121753. Substitute compatibility should be verified for your specific system.
What is the NSN for 11503663?
11503663 is cataloged in the U.S. Government catalog under NSN 5310-01-159-1867. 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.