The Washer,flat, cataloged under National Stock Number 5310-01-447-4706, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Hardigg Industries, Llc Div Hardigg Cases. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-447-4706 |
| Primary Part Number | P21-314-1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Hardigg Industries, Llc Div Hardigg Cases |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM B 633, TY1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.729 INCHES MINIMUM AND 0.739 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1020 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.192 INCHES MINIMUM AND 0.196 INCHES MAXIMUM IN |
| Thickness | 0.062 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| P21-314-1 PRIMARY | Hardigg Industries, Llc Div Hardigg Cases (USA) |
NSN 5310-01-447-4706 is a Washer,flat, manufactured by Hardigg Industries, Llc Div Hardigg Cases, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-447-4706 has 1 manufacturer part number on file: P21-314-1 (Hardigg Industries, Llc Div Hardigg Cases).
Key specifications for P21-314-1: Surface Treatment Document and Classification: ASTM B 633, TY1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.729 INCHES MINIMUM AND 0.739 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: ZINC AND CHROMATE OVERALL. 9 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.