The Washer,flat, cataloged under National Stock Number 5310-00-209-4012, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-209-4012 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Overall Diameter | 0.8025 INCHES MINIMUM AND 0.8225 INCHES MAXIMUM IN |
| Hardness Rating | 27.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | MIL-S-6050,COND F4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 8630 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.378 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN |
| Thickness | 0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| FFW92A | 4/1 Identification reference U.S. Government activity |
| 342930-4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-209-4012 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-209-4012: Overall Diameter: 0.8025 INCHES MINIMUM AND 0.8225 INCHES MAXIMUM IN; Hardness Rating: 27.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM; Material Document and Classification: MIL-S-6050,COND F4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 10 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.