The Washer,flat, cataloged under National Stock Number 5310-01-009-3604, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-009-3604 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Overall Diameter | 1.485 INCHES MINIMUM AND 1.515 INCHES MAXIMUM IN |
| Heat Treatment | COLD ROLLED |
| Hardness Rating | 70.0 ROCKWELL B MINIMUM AND 85.0 ROCKWELL B MAXIMUM |
| Material Document and Classification | QQ-S-698,COMP 1020,COND CR,TEMPER 2,FINISH 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1020 OVERALL |
| Center Hole Shape Style | ROUND |
| Thickness | 0.018 INCHES MINIMUM AND 0.022 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 |
|---|---|
| 56B23012-15 | 5/9 Secondary reference U.S. Government activity |
| 56B23012-6 | 5/9 Secondary reference U.S. Government activity |
| 56B23012-15 | 3/9 Design control — primary reference U.S. Government activity |
| 56B23012-15 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-009-3604 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-009-3604: Overall Diameter: 1.485 INCHES MINIMUM AND 1.515 INCHES MAXIMUM IN; Heat Treatment: COLD ROLLED; Hardness Rating: 70.0 ROCKWELL B MINIMUM AND 85.0 ROCKWELL B MAXIMUM; Material Document and Classification: QQ-S-698,COMP 1020,COND CR,TEMPER 2,FINISH 2 FED SPEC SINGLE MATERIAL RESPONSE 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.