The Washer,flat, cataloged under National Stock Number 5310-00-140-9576, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-140-9576 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.458 INCHES MINIMUM AND 0.478 INCHES MAXIMUM IN |
| Heat Treatment | AS FABRICATED |
| Hardness Rating | 75.0 ROCKWELL B MINIMUM AND 85.0 ROCKWELL B MAXIMUM OR 90.0 ROCKWELL B MINIMUM AND 102.0 ROCKWELL B MAXIMUM |
| Material Document and Classification | AMS 5044 ASSN STD 1ST MATERIAL RESPONSE AND AMS 5045 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1010 OR STEEL COMP 1020 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.194 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN |
| Thickness | 0.045 INCHES MINIMUM AND 0.055 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 |
|---|---|
| 10-78655 | 5/9 Secondary reference Amphenol Corp Div Amphenol Aerospace Operations |
| 10-78655 | 3/9 Design control — primary reference Teledyne Industries Inc Teledyne Power Systems Div |
| 10-78655 | 5/9 Secondary reference Unison Industries Llc |
NSN 5310-00-140-9576 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-140-9576: Surface Treatment Document and Classification: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.458 INCHES MINIMUM AND 0.478 INCHES MAXIMUM IN; Heat Treatment: AS FABRICATED; Hardness Rating: 75.0 ROCKWELL B MINIMUM AND 85.0 ROCKWELL B MAXIMUM OR 90.0 ROCKWELL B MINIMUM AND 102.0 ROCKWELL B MAXIMUM. 12 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.