The Washer,flat, cataloged under National Stock Number 5310-01-496-2595, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-496-2595 |
| Primary Part Number | AEW23M12N000CG9A91 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM B633,TY 2,CL 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 24.88 MILLIMETERS MINIMUM AND 25.40 MILLIMETERS MAXIMUM MM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 13.30 MILLIMETERS MINIMUM AND 13.57 MILLIMETERS MAXIMUM MM |
| Thickness | 2.00 MILLIMETERS MINIMUM AND 2.80 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 |
|---|---|
| AEW23M12N000CG9A91 PRIMARY | The American Society of Mechanical Engineers (USA) |
| Reference | Meaning |
|---|---|
| B18.22 | 5/1 Secondary reference The American Society of Mechanical Engineers |
| B1822BS120N | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-496-2595 is a Washer,flat, manufactured by The American Society of Mechanical Engineers, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-496-2595 has 1 manufacturer part number on file: AEW23M12N000CG9A91 (The American Society of Mechanical Engineers).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-527-0474. Verify interchangeability with system specifications before substitution.
Key specifications for AEW23M12N000CG9A91: Surface Treatment Document and Classification: ASTM B633,TY 2,CL 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 24.88 MILLIMETERS MINIMUM AND 25.40 MILLIMETERS MAXIMUM MM; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: ZINC AND CHROMATE 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.