The Washer,flat, cataloged under National Stock Number 5310-01-126-4753, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-126-4753 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES BOTTOM |
| Surface Finish | 125.0 MICROINCHES TOP |
| Overall Diameter | 0.980 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN |
| Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 4140 OR STEEL COMP E4340 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.675 INCHES MINIMUM AND 0.685 INCHES MAXIMUM IN |
| Thickness | 0.067 INCHES MINIMUM AND 0.070 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 |
|---|---|
| 10109449 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 42312-174 | 3/2 Design control — primary reference U.S. Government activity |
| 42312D174 | 5/2 Secondary reference U.S. Government activity |
| 42312D174 | C/1 Advisory reference — outside the item-of-supply concept Export Management Consultants, Inc. Dba Export Management Consultants Inc Div Export Management Consultants |
NSN 5310-01-126-4753 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-126-4753: Surface Finish: 125.0 MICROINCHES BOTTOM; Surface Finish: 125.0 MICROINCHES TOP; Overall Diameter: 0.980 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN; Hardness Rating: 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM. 11 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.