The Washer,flat, cataloged under National Stock Number 5310-01-490-7339, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Accurate Screw Machine Co. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-490-7339 |
| Primary Part Number | 126-062SS-12 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Accurate Screw Machine Co |
| Status | ACTIVE |
| Surface Treatment Document and Classification | STM-A-380-78 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.750 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.172 INCHES NOMINAL IN |
| Thickness | 0.062 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 126-062SS-12 PRIMARY | Accurate Screw Machine Co (USA) |
NSN 5310-01-490-7339 is a Washer,flat, manufactured by Accurate Screw Machine Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-490-7339 has 1 manufacturer part number on file: 126-062SS-12 (Accurate Screw Machine Co).
Key specifications for 126-062SS-12: Surface Treatment Document and Classification: STM-A-380-78 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.750 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: PASSIVATE 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.