The Washer,flat, cataloged under National Stock Number 5310-01-657-2701, 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 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-657-2701 |
| Primary Part Number | AEW23X08N000EA1M51 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Overall Diameter | 15.57 MILLIMETERS MINIMUM AND 16.00 MILLIMETERS MAXIMUM MM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Color | BLACK OVERALL |
| Surface Treatment | PHOSPHATE AND ZINC OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 8.40 MILLIMETERS MINIMUM AND 8.62 MILLIMETERS MAXIMUM MM |
| Thickness | 1.4 MILLIMETERS MINIMUM AND 1.8 MILLIMETERS MAXIMUM MM |
| 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 |
|---|---|
| AEW23X08N000EA1M51 PRIMARY | The American Society of Mechanical Engineers (USA) |
| 3836239004 | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 3836239 | D/9 Drawing number reference only Oshkosh Defense Llc |
NSN 5310-01-657-2701 is a Washer,flat, manufactured by The American Society of Mechanical Engineers, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-657-2701 has 2 manufacturer part numbers on file: AEW23X08N000EA1M51 (The American Society of Mechanical Engineers), 3836239004 (Oshkosh Defense Llc).
Key specifications for AEW23X08N000EA1M51: Overall Diameter: 15.57 MILLIMETERS MINIMUM AND 16.00 MILLIMETERS MAXIMUM MM; Cross-Sectional Shape Style: RECTANGULAR; Color: BLACK OVERALL; Surface Treatment: PHOSPHATE AND ZINC 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.