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229-004321 — WASHER,CONCAVE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

229-004321: WASHER,CONCAVE.

The WASHER,CONCAVE is a the manufacturer industrial component. Key specifications include radius: 2.710 INCHES MINIMUM AND 2.720 INCHES MAXIMUM IN, material: STEEL CORROSION RESISTING OVERALL, recess_depth: 0.040 INCHES NOMINAL IN, hole_diameter: 0.255 INCHES MINIMUM AND 0.262 INCHES MAXIMUM IN, surface_finish: 32.0 MICROINCHES TOP, outside_diameter: 0.710 INCHES MINIMUM AND 0.730 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-052-0039, 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
229-004321
NSN: 5310-01-052-0039
FSC: 5310 — Nuts and Washers
CAGE: 33827 — BAE SYSTEMS INTEGRATED DEFENSE SOLUTIONS INC. (USA)
SPECIFICATIONS
radius2.710 INCHES MINIMUM AND 2.720 INCHES MAXIMUM IN
materialSTEEL CORROSION RESISTING OVERALL
recess_depth0.040 INCHES NOMINAL IN
hole_diameter0.255 INCHES MINIMUM AND 0.262 INCHES MAXIMUM IN
surface_finish32.0 MICROINCHES TOP
outside_diameter0.710 INCHES MINIMUM AND 0.730 INCHES MAXIMUM IN
style_designatorCONCAVE
surface_treatmentOXIDE FILM OVERALL
material_thickness0.120 INCHES NOMINAL IN
material_document_and_classificationMIL-S-18732 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
surface_treatment_document_and_classificationMIL-C-13924,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-052-0039
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 229-004321 · 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 FINISH: 32.0 MICROINCHES TOP
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-13924,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
RADIUS: 2.710 INCHES MINIMUM AND 2.720 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: CONCAVE
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-18732 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.710 INCHES MINIMUM AND 0.730 INCHES MAXIMUM IN
•
RECESS DEPTH: 0.040 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.120 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES TOP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-13924,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
RADIUS2.710 INCHES MINIMUM AND 2.720 INCHES MAXIMUM IN
STYLE DESIGNATORCONCAVE
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-18732 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.710 INCHES MINIMUM AND 0.730 INCHES MAXIMUM IN
RECESS DEPTH0.040 INCHES NOMINAL IN
MATERIAL THICKNESS0.120 INCHES NOMINAL IN
SURFACE TREATMENTOXIDE FILM OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
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 229-004321?
229-004321 is a WASHER,CONCAVE.
What is the NSN for 229-004321?
229-004321 is cataloged in the U.S. Government catalog under NSN 5310-01-052-0039. This indicates validated use in U.S. government and defense supply chains.
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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.