The Fuze,mechanical Time, cataloged under National Stock Number 1390-00-640-8725, is classified within Federal Supply Class 1390 (Fuzes and Primers) of the Ammunition and Explosives group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1390-00-640-8725 |
| Primary Part Number | 581879 |
| Item Name | Fuze,mechanical Time |
| FSC / FSG | 1390 / 13 — Fuzes and Primers |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Net Explosive Weight | 0.0071 STORAGE POUNDS AND 0.0071 TRANSPORTATION POUNDS |
| Delay Time in Seconds | 0.60 MINIMUM AND 45.00 MAXIMUM |
| Fuze Model Number | MK 50 MOD 3 |
| Dot Proper Shipping Name | FUZES, DETONATING |
| Unit Package Type | CAN AND BOX, WOOD |
| Dot Identification Number | UN0257 |
| Dot Registration Code | EX1987120371 |
| Fuze Wrench | NOT INCLUDED |
| Dod Ammunition Code | 1390-N240 |
| Hazardous Material Classification Code | 1.4 DEPARTMENT OF DEFENSE HAZARD CLASS DIVISION |
| Unable to Decode | UNABLE TO DECODE |
| Action Time Designation | TIME DELAY |
| Gross Weight | 84.0 SHIPPING CONTAINER POUNDS AND 84.0 PALLET POUNDS |
| Booster | NOT INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL G — Ammunition & Explosives |
| Hazard | No hazard code in the DLA record (HMIC N) UN ID UN0257 · 1.4 DEPARTMENT OF DEFENSE HAZARD CLASS DIVISION · ships as FUZES, DETONATING |
| Criticality Code | N |
| Part Number | Manufacturer |
|---|---|
| 581879 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 1390-N240 | 6/9 Informative reference only U.S. Government activity |
NSN 1390-00-640-8725 is a Fuze,mechanical Time, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 1390, Fuzes and Primers. Status: active.
NSN 1390-00-640-8725 has 1 manufacturer part number on file: 581879 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
1 possible match (shared part number, not a government interchangeability claim): 1390-00-640-8726. Verify interchangeability with system specifications before substitution.
Key specifications for 581879: Net Explosive Weight: 0.0071 STORAGE POUNDS AND 0.0071 TRANSPORTATION POUNDS; Delay Time in Seconds: 0.60 MINIMUM AND 45.00 MAXIMUM; Fuze Model Number: MK 50 MOD 3; Dot Proper Shipping Name: FUZES, DETONATING. 14 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). The government record also carries hazard data: DOT hazard class, UN number, or related classification fields. Special handling, storage, and shipping requirements apply per the cited government fields.
NSN 1390-00-640-8725 has DEMIL Code G. Demilitarization may be required before disposal or transfer to non-military entities.
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.