The Washer,flat, cataloged under National Stock Number 5310-01-137-7804, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Hancock Manufacturing Corp. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-137-7804 |
| Primary Part Number | 7228385P44 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Hancock Manufacturing Corp |
| Status | ACTIVE |
| Overall Diameter | 0.406 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.193 INCHES NOMINAL IN |
| Thickness | 0.185 INCHES MINIMUM AND 0.191 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 |
|---|---|
| 7228385P44 PRIMARY | Hancock Manufacturing Corp (USA) |
| 7228385P44 | Itt Hancock Industries (USA) |
| 7228385P44 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 7228385P044 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5310-01-137-7804 is a Washer,flat, manufactured by Hancock Manufacturing Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-137-7804 has 3 manufacturer part numbers on file: 7228385P44 (Hancock Manufacturing Corp), 7228385P44 (Itt Hancock Industries), 7228385P44 (Lockheed Martin Corporation Div Rms).
Key specifications for 7228385P44: Overall Diameter: 0.406 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: PLASTIC POLYTETRAFLUOROETHYLENE 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.