The Washer,flat, cataloged under National Stock Number 5310-01-598-5201, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Department of Transportation Federal Aviation Administration Technical Center. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-598-5201 |
| Primary Part Number | R9-003.12.2.2 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Department of Transportation Federal Aviation Administration Technical Center |
| Status | ACTIVE |
| Overall Diameter | 0.500 INCHES NOMINAL IN |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 316 OVERALL |
| Hole Diameter | 0.265 INCHES NOMINAL IN |
| Thickness | 0.063 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 |
|---|---|
| R9-003.12.2.2 PRIMARY | Department of Transportation Federal Aviation Administration Technical Center (USA) |
| Reference | Meaning |
|---|---|
| WSF025X0500316 | 5/9 Secondary reference Guidon Corporation Div Guidon Corp |
| WSF265X500X0625316 | 5/9 Secondary reference Guidon Corporation Div Guidon Corp |
NSN 5310-01-598-5201 is a Washer,flat, manufactured by Department of Transportation Federal Aviation Administration Technical Center, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-598-5201 has 1 manufacturer part number on file: R9-003.12.2.2 (Department of Transportation Federal Aviation Administration Technical Center).
Key specifications for R9-003.12.2.2: Overall Diameter: 0.500 INCHES NOMINAL IN; Peripheral Shape Style: ROUND; Part Name Assigned by Controlling Agency: WASHER,FLAT; End Item Identification: AIRPORT SURVEILLANCE RADAR 9. 5 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.