The Washer,lock, cataloged under National Stock Number 5310-00-003-4049, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is International Business Machines Corp Parts Order Center Dept E - 54. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-003-4049 |
| Primary Part Number | 2261921 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | International Business Machines Corp Parts Order Center Dept E - 54 |
| Status | ACTIVE |
| Style Designator | FLAT INTERNAL TEETH |
| Outside Diameter | 0.378 INCHES NOMINAL IN |
| Material Thickness | 0.022 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Hole Diameter | 0.188 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 |
|---|---|
| 2261921 PRIMARY | International Business Machines Corp Parts Order Center Dept E - 54 (USA) |
| Reference | Meaning |
|---|---|
| 2261921 | 5/9 Secondary reference International Business Machines Corporation Dba IBM |
NSN 5310-00-003-4049 is a Washer,lock, manufactured by International Business Machines Corp Parts Order Center Dept E - 54, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-003-4049 has 1 manufacturer part number on file: 2261921 (International Business Machines Corp Parts Order Center Dept E - 54).
Key specifications for 2261921: Style Designator: FLAT INTERNAL TEETH; Outside Diameter: 0.378 INCHES NOMINAL IN; Material Thickness: 0.022 INCHES NOMINAL IN; Material: STEEL OVERALL. 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.