The Washer,flat, cataloged under National Stock Number 5310-01-723-4026, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sae International Dba Sae International. 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 | 5310-01-723-4026 |
| Primary Part Number | AS4579D20-16J |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Overall Diameter | 2.557 INCHES MINIMUM AND 2.572 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-A-250/5 CONDITION T3 OR T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Specification/standard Data | 0U583-AS4679 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Peripheral Shape Style | ROUND |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.828 INCHES NOMINAL IN |
| Thickness | 0.013 INCHES MINIMUM AND 0.019 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 |
|---|---|
| AS4579D20-16J PRIMARY | Sae International Dba Sae International (USA) |
NSN 5310-01-723-4026 is a Washer,flat, manufactured by Sae International Dba Sae International, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-723-4026 has 1 manufacturer part number on file: AS4579D20-16J (Sae International Dba Sae International).
Key specifications for AS4579D20-16J: Overall Diameter: 2.557 INCHES MINIMUM AND 2.572 INCHES MAXIMUM IN; Material Document and Classification: QQ-A-250/5 CONDITION T3 OR T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Specification/standard Data: 0U583-AS4679 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD. 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.