The Washer,flat, cataloged under National Stock Number 5310-01-124-3102, 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 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-124-3102 |
| Primary Part Number | 2190-0402 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Keysight Technologies Inc |
| Status | ACTIVE |
| Overall Diameter | 0.438 INCHES NOMINAL IN |
| Peripheral Shape Style | ROUND |
| 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 |
|---|---|
| 2190-0402 PRIMARY | Keysight Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| 2190-0402 | 5/9 Secondary reference Hewlett-Packard Company Dba HP |
| 2190-0402 | 3/9 Design control — primary reference Keysight Technologies, Inc. |
NSN 5310-01-124-3102 is a Washer,flat, manufactured by Keysight Technologies Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-124-3102 has 1 manufacturer part number on file: 2190-0402 (Keysight Technologies Inc).
Key specifications for 2190-0402: Overall Diameter: 0.438 INCHES NOMINAL IN; Peripheral Shape Style: ROUND. 2 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.