The Washer,lock, cataloged under National Stock Number 5310-00-401-6938, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Keysight Technologies Inc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-401-6938 |
| Primary Part Number | 2190-0047 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Keysight Technologies Inc |
| Status | ACTIVE |
| Style Designator | COUNTERSINK EXTERNAL TEETH |
| Outside Diameter | 0.275 INCHES NOMINAL IN |
| Material Thickness | 0.020 INCHES NOMINAL IN |
| Surface Treatment | CHROMIUM OVERALL |
| Countersink Angle | 90.0 DEGREES NOMINAL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.146 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 |
|---|---|
| 2190-0047 PRIMARY | Keysight Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| 2190-0047 | 5/9 Secondary reference Hewlett-Packard Company Dba HP |
| 1506-00 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 2190-0047 | 3/9 Design control — primary reference Keysight Technologies, Inc. |
NSN 5310-00-401-6938 is a Washer,lock, manufactured by Keysight Technologies Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-401-6938 has 1 manufacturer part number on file: 2190-0047 (Keysight Technologies Inc).
Key specifications for 2190-0047: Style Designator: COUNTERSINK EXTERNAL TEETH; Outside Diameter: 0.275 INCHES NOMINAL IN; Material Thickness: 0.020 INCHES NOMINAL IN; Surface Treatment: CHROMIUM 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.