The Washer,flat, cataloged under National Stock Number 5310-01-100-2066, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Elettronica Aster Spa. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-100-2066 |
| Primary Part Number | 410266-58 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Elettronica Aster Spa |
| Status | ACTIVE |
| Overall Diameter | 0.312 INCHES NOMINAL IN |
| Heat Treatment | ANNEALED |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 304 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.116 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 |
|---|---|
| 410266-58 | Elettronica Aster Spa (ITA) |
| Reference | Meaning |
|---|---|
| 410266-58 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-100-2066 is a Washer,flat, manufactured by Elettronica Aster Spa, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-100-2066 has 1 manufacturer part number on file: 410266-58 (Elettronica Aster Spa).
Key specifications for 410266-58: Overall Diameter: 0.312 INCHES NOMINAL IN; Heat Treatment: ANNEALED; 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.