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GW10U4AA3 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

GW10U4AA3: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include thickness: 0.053 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN, hole_diameter: 0.118 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN, overall_diameter: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN, surface_treatment: ANODIZE OR CHROMATE OR PRIMER OVERALL, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-040-4741, 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
GW10U4AA3
NSN: 5310-01-040-4741
FSC: 5310 — Nuts and Washers
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
thickness0.053 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
hole_diameter0.118 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN
overall_diameter0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
surface_treatmentANODIZE OR CHROMATE OR PRIMER OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
material_document_and_classificationQQ-A-250/3 T6 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/6 T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
surface_treatment_document_and_classificationMIL-A-8625 TY 2 CL 1 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541 CL 1A MIL SPEC 2ND TREATMENT RESPONSE OR MIL-P-23377 MIL SPEC 3RD TREATMENT RESPONSE OVERALL A
NSN5310-01-040-4741
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: GW10U4AA3 · 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 TY 2 CL 1 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541 CL 1A MIL SPEC 2ND TREATMENT RESPONSE OR MIL-P-23377 MIL SPEC 3RD TREATMENT RESPONSE OVERALL A
•
OVERALL DIAMETER: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/3 T6 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/6 T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: ANODIZE OR CHROMATE OR PRIMER OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.118 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 TY 2 CL 1 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541 CL 1A MIL SPEC 2ND TREATMENT RESPONSE OR MIL-P-23377 MIL SPEC 3RD TREATMENT RESPONSE OVERALL A
OVERALL DIAMETER0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/3 T6 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/6 T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTANODIZE OR CHROMATE OR PRIMER OVERALL
PERIPHERAL SHAPE STYLEROUND
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.118 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN
THICKNESS0.053 INCHES MINIMUM AND 0.073 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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is GW10U4AA3?
GW10U4AA3 is a WASHER,FLAT.
What is the NSN for GW10U4AA3?
GW10U4AA3 is cataloged in the U.S. Government catalog under NSN 5310-01-040-4741. 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.