The Fuze,proximity, cataloged under National Stock Number 1390-00-309-4973, is classified within Federal Supply Class 1390 (Fuzes and Primers) of the Ammunition and Explosives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1390-00-309-4973 |
| Item Name | Fuze,proximity |
| FSC / FSG | 1390 / 13 — Fuzes and Primers |
| Status | ACTIVE |
| Auxiliary Detonating Fuze Model Number | MK 52 |
| Auxiliary Detonating Fuze | INCLUDED |
| Net Explosive Weight | 0.0558700 STORAGE POUNDS AND 0.0558700 TRANSPORTATION POUNDS |
| Fuze Model Number | M514B1 |
| Unit Package Type | CAN, METAL |
| Fuze Wrench | NOT INCLUDED |
| Unit Package Quantity | 24 |
| Dod Ammunition Code | 1390-N411 |
| Hazardous Material Classification Code | 04 INHABITED BUILDING DISTANCE AND 1.2 DEPARTMENT OF DEFENSE HAZARD CLASS DIVISION AND D STORAGE COMPATIBILITY GROUP AND I DEPARTMENT OF TRANSPORTATION CLASS |
| Unable to Decode | UNABLE TO DECODE |
| Gross Weight | 62.0 SHIPPING CONTAINER POUNDS AND 1940.0 PALLET POUNDS |
| Booster | NOT INCLUDED |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY FUZE MODEL NUMBER;UNIT PACKAGE QUANTITY;UNIT PACKAGE TYPE;PACKAGE MODEL NUMBER |
| Self-Destroying Feature | INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL G — Ammunition & Explosives |
| Hazard | No hazard code in the DLA record (HMIC N) 04 INHABITED BUILDING DISTANCE AND 1.2 DEPARTMENT OF DEFENSE HAZARD CLASS DIVISION AND D STORAGE COMPATIBILITY GROUP AND I DEPARTMENT OF TRANSPORTATION CLASS |
| Criticality Code | N |
| Reference | Meaning |
|---|---|
| 795245 | 3/1 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 1390-N411 | 6/9 Informative reference only U.S. Government activity |
NSN 1390-00-309-4973 is a Fuze,proximity, classified under FSC 1390, Fuzes and Primers. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 1390-00-309-4974, 1390-00-324-1421, 1390-00-926-4055. Verify interchangeability with system specifications before substitution.
Key specifications for 1390-00-309-4973: Auxiliary Detonating Fuze Model Number: MK 52; Auxiliary Detonating Fuze: INCLUDED; Net Explosive Weight: 0.0558700 STORAGE POUNDS AND 0.0558700 TRANSPORTATION POUNDS; Fuze Model Number: M514B1. 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 1390-00-309-4973 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.