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2301790 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2301790: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 6061 OVERALL, recess_depth: 0.197 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN, hole_diameter: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, overall_height: 0.264 INCHES MINIMUM AND 0.274 INCHES MAXIMUM IN, outside_diameter: 0.537 INCHES MINIMUM AND 0.542 INCHES MAXIMUM IN, style_designator: RECESSED. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-901-0811, 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
2301790
NSN: 5310-00-901-0811
FSC: 5310 — Nuts and Washers
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 6061 OVERALL
recess_depth0.197 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN
hole_diameter0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
overall_height0.264 INCHES MINIMUM AND 0.274 INCHES MAXIMUM IN
outside_diameter0.537 INCHES MINIMUM AND 0.542 INCHES MAXIMUM IN
style_designatorRECESSED
surface_treatmentANODIZE OVERALL
material_thickness0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
material_document_and_classificationQQ-A-225/6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/8 FED SPEC 2ND MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-901-0811
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2301790 · 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-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/8 FED SPEC 2ND MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.537 INCHES MINIMUM AND 0.542 INCHES MAXIMUM IN
•
RECESS DEPTH: 0.197 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ANODIZE OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.264 INCHES MINIMUM AND 0.274 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/8 FED SPEC 2ND MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.537 INCHES MINIMUM AND 0.542 INCHES MAXIMUM IN
RECESS DEPTH0.197 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN
MATERIAL THICKNESS0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
SURFACE TREATMENTANODIZE OVERALL
MATERIALALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 6061 OVERALL
HOLE DIAMETER0.240 INCHES MINIMUM AND 0.260 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
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2301790?
2301790 is a WASHER,RECESSED.
What is the NSN for 2301790?
2301790 is cataloged in the U.S. Government catalog under NSN 5310-00-901-0811. 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.