The Washer,flat, cataloged under National Stock Number 5310-01-388-7419, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Entwistle Company Llc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-388-7419 |
| Primary Part Number | 8909A344-001 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| Overall Diameter | 1.470 INCHES MINIMUM AND 1.530 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 304 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.500 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| Thickness | 0.014 INCHES MINIMUM AND 0.034 INCHES MAXIMUM 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 |
|---|---|
| 8909A344-001 PRIMARY | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| 8909A344-001 | 5/9 Secondary reference Entwistle Co the Defense Technology Div |
| 8909A344-001 | 5/2 Secondary reference U.S. Government activity |
| 8909A344-001 | 5/9 Secondary reference Paralap Co |
NSN 5310-01-388-7419 is a Washer,flat, manufactured by The Entwistle Company Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-388-7419 has 1 manufacturer part number on file: 8909A344-001 (The Entwistle Company Llc).
Key specifications for 8909A344-001: Overall Diameter: 1.470 INCHES MINIMUM AND 1.530 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: STEEL COMP 304 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.