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204-010-128-001 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

204-010-128-001: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL OR STEEL COMP 416 OVERALL, hole_diameter: 3.515 INCHES NOMINAL IN, outside_diameter: 4.200 INCHES NOMINAL IN, style_designator: RECESSED BOTH SIDES, top_recess_angle: 90.0 DEGREES NOMINAL, surface_treatment: CADMIUM OR PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-076-9864, 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
204-010-128-001
NSN: 5310-00-076-9864
FSC: 5310 — Nuts and Washers
CAGE: 97499 — BELL TEXTRON INC (USA)
SPECIFICATIONS
materialSTEEL OR STEEL COMP 416 OVERALL
hole_diameter3.515 INCHES NOMINAL IN
outside_diameter4.200 INCHES NOMINAL IN
style_designatorRECESSED BOTH SIDES
top_recess_angle90.0 DEGREES NOMINAL
surface_treatmentCADMIUM OR PASSIVATE OVERALL
material_thickness0.220 INCHES NOMINAL IN
bottom_recess_angle90.0 DEGREES NOMINAL
top_recess_diameter3.555 INCHES NOMINAL IN
bottom_recess_diameter3.555 INCHES NOMINAL IN
material_document_and_classificationAMS6371 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationBPSPW4006,TYPE 1,CLASS B,FSCM 97499 MFR REF SINGLE TREATMENT RESPONSE OR QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OR BPS FW4138,FSCM 97499 MFR REF SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-076-9864
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 204-010-128-001 · 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
•
TOP RECESS DIAMETER: 3.555 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: BPSPW4006,TYPE 1,CLASS B,FSCM 97499 MFR REF SINGLE TREATMENT RESPONSE OR QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OR BPS FW4138,FSCM 97499 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
BOTTOM RECESS DIAMETER: 3.555 INCHES NOMINAL IN
•
TOP RECESS ANGLE: 90.0 DEGREES NOMINAL
•
STYLE DESIGNATOR: RECESSED BOTH SIDES
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS6371 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 4.200 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.220 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
TOP RECESS DIAMETER3.555 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONBPSPW4006,TYPE 1,CLASS B,FSCM 97499 MFR REF SINGLE TREATMENT RESPONSE OR QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OR BPS FW4138,FSCM 97499 MFR REF SINGLE TREATMENT RESPONSE OVERALL
BOTTOM RECESS DIAMETER3.555 INCHES NOMINAL IN
TOP RECESS ANGLE90.0 DEGREES NOMINAL
STYLE DESIGNATORRECESSED BOTH SIDES
MATERIAL DOCUMENT AND CLASSIFICATIONAMS6371 ASSN STD SINGLE MATERIAL RESPONSE OR QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER4.200 INCHES NOMINAL IN
MATERIAL THICKNESS0.220 INCHES NOMINAL IN
BOTTOM RECESS ANGLE90.0 DEGREES NOMINAL
SURFACE TREATMENTCADMIUM OR PASSIVATE OVERALL
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
204-010-128-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandDemilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is 204-010-128-001?
204-010-128-001 is a WASHER,RECESSED.
What parts can replace 204-010-128-001?
There is 1 known substitute for 204-010-128-001: 204-010-128-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 204-010-128-001?
204-010-128-001 is cataloged in the U.S. Government catalog under NSN 5310-00-076-9864. 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.