The Hook,coat and Hat, cataloged under National Stock Number 5340-01-644-6303, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Underwater Diving Inc Dba Trident. Government technical data includes 1 specification, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5340-01-644-6303 |
| Primary Part Number | D639 |
| Item Name | Hook,coat and Hat |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Underwater Diving Inc Dba Trident |
| Status | ACTIVE |
| Color | BLACK |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| D639 PRIMARY | Underwater Diving Inc Dba Trident (USA) |
NSN 5340-01-644-6303 is a Hook,coat and Hat, manufactured by Underwater Diving Inc Dba Trident, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-644-6303 has 1 manufacturer part number on file: D639 (Underwater Diving Inc Dba Trident).
Key specifications for D639: Color: BLACK; Part Name Assigned by Controlling Agency: MULTI FUNCTION HANGER. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.