The Washer,flat, cataloged under National Stock Number 5310-01-409-1640, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Tdk-Lambda Americas Inc. Div Tdk-Lambda Americas-Low Power. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-409-1640 |
| Primary Part Number | JMD-10-021 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Tdk-Lambda Americas Inc. Div Tdk-Lambda Americas-Low Power |
| Status | ACTIVE |
| Overall Diameter | 0.312 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.147 INCHES NOMINAL IN |
| Thickness | 0.032 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 |
|---|---|
| JMD-10-021 PRIMARY | Tdk-Lambda Americas Inc. Div Tdk-Lambda Americas-Low Power (USA) |
| Reference | Meaning |
|---|---|
| JMD-10-021 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5310-01-409-1640 is a Washer,flat, manufactured by Tdk-Lambda Americas Inc. Div Tdk-Lambda Americas-Low Power, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-409-1640 has 1 manufacturer part number on file: JMD-10-021 (Tdk-Lambda Americas Inc. Div Tdk-Lambda Americas-Low Power).
Key specifications for JMD-10-021: Overall Diameter: 0.312 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: STEEL 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.