The Washer,flat, cataloged under National Stock Number 5310-01-305-7578, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-305-7578 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Overall Diameter | 0.980 INCHES MINIMUM AND 1.020 INCHES MAXIMUM IN |
| Material Document and Classification | A12F11A2,CAGEC 97424 MFR REF SINGLE MATERIAL RESPONSE OR MIL-R-3065 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-STD-417 MIL STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | RUBBER SILICONE CLASS Q OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.140 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN |
| Thickness | 0.020 INCHES MINIMUM AND 0.030 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 |
|---|---|
| 8900K68P022 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-305-7578 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-305-7578: Overall Diameter: 0.980 INCHES MINIMUM AND 1.020 INCHES MAXIMUM IN; Material Document and Classification: A12F11A2,CAGEC 97424 MFR REF SINGLE MATERIAL RESPONSE OR MIL-R-3065 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-STD-417 MIL 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.