The Washer,flat, cataloged under National Stock Number 5310-00-045-4719, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-045-4719 |
| Primary Part Number | A02R2874-1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Overall Diameter | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Heat Treatment | HARD DRAWN |
| Material Document and Classification | QQ-B-750 COMP D FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | COPPER ALLOY OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.690 INCHES MINIMUM AND 0.710 INCHES MAXIMUM IN |
| Thickness | 0.020 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 |
|---|---|
| A02R2874-1 PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| A02R2874-1 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-00-045-4719 is a Washer,flat, manufactured by The Boeing Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-045-4719 has 1 manufacturer part number on file: A02R2874-1 (The Boeing Company).
Key specifications for A02R2874-1: Overall Diameter: 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN; Heat Treatment: HARD DRAWN; Material Document and Classification: QQ-B-750 COMP D FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 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.