The Washer,flat, cataloged under National Stock Number 5310-01-239-7898, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Deere & Co. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-239-7898 |
| Primary Part Number | AR253248 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Deere & Co |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES BOTTOM |
| Surface Finish | 32.0 MICROINCHES TOP |
| Overall Diameter | 2.680 INCHES MINIMUM AND 2.700 INCHES MAXIMUM IN |
| Hardness Rating | 48.0 ROCKWELL C MINIMUM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.745 INCHES MINIMUM AND 1.761 INCHES MAXIMUM IN |
| Thickness | 0.0422 INCHES MINIMUM AND 0.0452 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 |
|---|---|
| AR253248 PRIMARY | Deere & Co (USA) |
| Reference | Meaning |
|---|---|
| R45425 | 3/9 Design control — primary reference Deere & Co |
NSN 5310-01-239-7898 is a Washer,flat, manufactured by Deere & Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-239-7898 has 1 manufacturer part number on file: AR253248 (Deere & Co).
Key specifications for AR253248: Surface Finish: 32.0 MICROINCHES BOTTOM; Surface Finish: 32.0 MICROINCHES TOP; Overall Diameter: 2.680 INCHES MINIMUM AND 2.700 INCHES MAXIMUM IN; Hardness Rating: 48.0 ROCKWELL C MINIMUM. 10 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.