The Washer,flat, cataloged under National Stock Number 5310-01-678-8931, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The American Society of Mechanical Engineers. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-678-8931 |
| Primary Part Number | AEW26X50W000EA1A91 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Overall Diameter | 1.743 INCHES MINIMUM AND 1.780 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | BLANK RECTANGULAR |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM IN |
| Thickness | 0.090 INCHES MINIMUM AND 0.112 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 |
| Part Number | Manufacturer |
|---|---|
| AEW26X50W000EA1A91 PRIMARY | The American Society of Mechanical Engineers (USA) |
| Reference | Meaning |
|---|---|
| B18.24 | 3/1 Design control — primary reference The American Society of Mechanical Engineers |
NSN 5310-01-678-8931 is a Washer,flat, manufactured by The American Society of Mechanical Engineers, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-678-8931 has 1 manufacturer part number on file: AEW26X50W000EA1A91 (The American Society of Mechanical Engineers).
Key specifications for AEW26X50W000EA1A91: Overall Diameter: 1.743 INCHES MINIMUM AND 1.780 INCHES MAXIMUM IN; Cross-Sectional Shape Style: BLANK RECTANGULAR; Surface Treatment: ZINC AND CHROMATE OVERALL; 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.