The Washer,flat, cataloged under National Stock Number 5310-00-080-9381, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Div Pratt & Whitney. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-080-9381 |
| Primary Part Number | 26316025-21 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corporation Div Pratt & Whitney |
| Status | ACTIVE |
| Overall Diameter | 0.328 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.218 INCHES NOMINAL IN |
| Thickness | 0.040 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 |
|---|---|
| 26316025-21 PRIMARY | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 26316025-21 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-080-9381 is a Washer,flat, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-080-9381 has 1 manufacturer part number on file: 26316025-21 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 26316025-21: Overall Diameter: 0.328 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL. 7 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.