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7903387-03 — WASHER,SHOULDERED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

7903387-03: WASHER,SHOULDERED.

The WASHER,SHOULDERED is a the manufacturer industrial component. Key specifications include material: CELLULOSE OVERALL, hole_diameter: 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN, shoulder_height: 0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN, outside_diameter: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN, style_designator: SHOULDERED, shoulder_diameter: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-043-8080, 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
7903387-03
NSN: 5310-01-043-8080
FSC: 5310 — Nuts and Washers
CAGE: 90536 — LOCKHEED MARTIN CORP DBA LOCKHEED MARTIN DIV MST - EAGAN (USA)
SPECIFICATIONS
materialCELLULOSE OVERALL
hole_diameter0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
shoulder_height0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
outside_diameter0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
style_designatorSHOULDERED
shoulder_diameter0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN
surface_treatmentVARNISH OVERALL
material_thickness0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN
material_document_and_classificationMIL-F-1148 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-V-173 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-043-8080
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7903387-03 · 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-V-173 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SHOULDER HEIGHT: 0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SHOULDERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-F-1148 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN
•
SURFACE TREATMENT: VARNISH OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-V-173 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER HEIGHT0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
STYLE DESIGNATORSHOULDERED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-F-1148 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
MATERIAL THICKNESS0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN
SHOULDER DIAMETER0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN
SURFACE TREATMENTVARNISH OVERALL
MATERIALCELLULOSE OVERALL
HOLE DIAMETER0.135 INCHES MINIMUM AND 0.145 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 1
903387-09Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 7903387-03?
7903387-03 is a WASHER,SHOULDERED.
What parts can replace 7903387-03?
There is 1 known substitute for 7903387-03: 903387-09. Substitute compatibility should be verified for your specific system.
What is the NSN for 7903387-03?
7903387-03 is cataloged in the U.S. Government catalog under NSN 5310-01-043-8080. 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.
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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.