The Washer,flat, cataloged under National Stock Number 5310-01-340-5084, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is American Metals & Machining. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-340-5084 |
| Primary Part Number | 13D0021-016 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | American Metals & Machining |
| Status | ACTIVE |
| Overall Diameter | 0.687 INCHES MINIMUM AND 0.693 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM A582,COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 303SE OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.516 INCHES NOMINAL IN |
| Thickness | 0.109 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 | N |
| Part Number | Manufacturer |
|---|---|
| 13D0021-016 | Buena Park Tool & Engineering, Inc Dba Buena Park Tool (USA) |
| 13D0021-016 | Am Machining, Inc. Dba Am Machining Inc Div Apv Manufacturing & Engineering Co. (USA) |
| 13D0021-016 PRIMARY | American Metals & Machining (USA) |
| 13D0021-016 PRIMARY | Woodruff Corporation (USA) |
| Reference | Meaning |
|---|---|
| 13D0021-016 | 3/2 Design control — primary reference U.S. Government activity |
| 13D0021-016 | 5/9 Secondary reference Reid Products Inc. Dba Reid Products Inc |
| 13D0021-016 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-340-5084 is a Washer,flat, manufactured by American Metals & Machining, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-340-5084 has 4 manufacturer part numbers on file: 13D0021-016 (Buena Park Tool & Engineering, Inc Dba Buena Park Tool), 13D0021-016 (Am Machining, Inc. Dba Am Machining Inc Div Apv Manufacturing & Engineering Co.), 13D0021-016 (American Metals & Machining), 13D0021-016 (Woodruff Corporation).
Key specifications for 13D0021-016: Overall Diameter: 0.687 INCHES MINIMUM AND 0.693 INCHES MAXIMUM IN; Material Document and Classification: ASTM A582,COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND. 8 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.