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03A257C10A — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

03A257C10A: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OR NICKEL ALLOY 718 OVERALL, recess_angle: 80.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM, hole_diameter: 0.627 INCHES MINIMUM AND 0.631 INCHES MAXIMUM IN, recess_diameter: 0.764 INCHES MINIMUM AND 0.774 INCHES MAXIMUM IN, outside_diameter: 1.153 INCHES MINIMUM AND 1.163 INCHES MAXIMUM IN, style_designator: RECESSED. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-364-2469, 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
03A257C10A
NSN: 5310-01-364-2469
FSC: 5310 — Nuts and Washers
CAGE: 14153 — DEFENSE LOGISTICS AGENCY DBA DEFENSE SUPPLY CENTER PHILADELPHIA (USA)
SPECIFICATIONS
materialIRON ALLOY 660 OR NICKEL ALLOY 718 OVERALL
recess_angle80.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM
hole_diameter0.627 INCHES MINIMUM AND 0.631 INCHES MAXIMUM IN
recess_diameter0.764 INCHES MINIMUM AND 0.774 INCHES MAXIMUM IN
outside_diameter1.153 INCHES MINIMUM AND 1.163 INCHES MAXIMUM IN
style_designatorRECESSED
surface_treatmentALUMINUM ALLOY OVERALL
material_thickness0.099 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
surface_treatment_document_and_classificationNAS 4006 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-364-2469
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 03A257C10A · 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: NAS 4006 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS5525 ASSN STD 1ST MATERIAL RESPONSE OR AMS5737 ASSN STD 1ST MATERIAL RESPONSE OR AMS5596 ASSN STD 2ND MATERIAL RESPONSE OR AMS5597 ASSN STD 2ND MATERIAL RESPONSE OR AMS5662 ASSN STD 2ND MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.153 INCHES MINIMUM AND 1.163 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.099 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
•
RECESS DIAMETER: 0.764 INCHES MINIMUM AND 0.774 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ALUMINUM ALLOY OVERALL
•
MATERIAL: IRON ALLOY 660 OR NICKEL ALLOY 718 OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONNAS 4006 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5525 ASSN STD 1ST MATERIAL RESPONSE OR AMS5737 ASSN STD 1ST MATERIAL RESPONSE OR AMS5596 ASSN STD 2ND MATERIAL RESPONSE OR AMS5597 ASSN STD 2ND MATERIAL RESPONSE OR AMS5662 ASSN STD 2ND MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.153 INCHES MINIMUM AND 1.163 INCHES MAXIMUM IN
MATERIAL THICKNESS0.099 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
RECESS DIAMETER0.764 INCHES MINIMUM AND 0.774 INCHES MAXIMUM IN
SURFACE TREATMENTALUMINUM ALLOY OVERALL
MATERIALIRON ALLOY 660 OR NICKEL ALLOY 718 OVERALL
HOLE DIAMETER0.627 INCHES MINIMUM AND 0.631 INCHES MAXIMUM IN
RECESS ANGLE80.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM
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 4
VN948BF10CSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
MM118C10ASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
NS202860C10ASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
AS19879C10ASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 03A257C10A?
03A257C10A is a WASHER,RECESSED.
What parts can replace 03A257C10A?
There are 4 known substitutes for 03A257C10A: VN948BF10C, MM118C10A, NS202860C10A and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 03A257C10A?
03A257C10A is cataloged in the U.S. Government catalog under NSN 5310-01-364-2469. 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.