The Fuse,cartridge, cataloged under National Stock Number 5920-01-320-3953, is classified within Federal Supply Class 5920 (Fuses, Arrestors, Absorbers, and Protectors) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Cooper Bussmann, Llc Dba Cooper Industries. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5920-01-320-3953 |
| Primary Part Number | FNW-12 |
| Item Name | Fuse,cartridge |
| FSC / FSG | 5920 / 59 — Fuses, Arrestors, Absorbers, and Protectors |
| Manufacturer | Cooper Bussmann, Llc Dba Cooper Industries |
| Status | ACTIVE |
| Continuous Current Rating in Amps | 12.000 |
| Fragility Factor | MODERATELY RUGGED |
| Body Style | TUBE TYPE |
| Circuit Over-Current Interruption Delay Time in Seconds | 30.0 250 PCT OF CURRENT RATING |
| Overall Diameter | 0.406 INCHES NOMINAL IN |
| Interruption Indicator Method | OPAQUE BODY |
| Features Provided | NONRENEWABLE FUSIBLE ELEMENT |
| Surface Treatment | NICKEL TERMINAL |
| Maximum Voltage Rating in Volts | 250.0 AC AND 250.0 DC |
| Material | COPPER ALLOY TERMINAL |
| Material | PLASTIC MELAMINE AND GLASS CASE |
| Circuit Over-Current Interruption Type | TIME DELAY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
NSN 5920-01-320-3953 is a Fuse,cartridge, manufactured by Cooper Bussmann, Llc Dba Cooper Industries, classified under FSC 5920, Fuses, Arrestors, Absorbers, and Protectors. Status: active.
NSN 5920-01-320-3953 has 2 manufacturer part numbers on file: FNW-12 (Cooper Bussmann, Llc Dba Cooper Industries), FLM012 (Littelfuse, Inc.).
Key specifications for FNW-12: Continuous Current Rating in Amps: 12.000; Fragility Factor: MODERATELY RUGGED; Body Style: TUBE TYPE; Circuit Over-Current Interruption Delay Time in Seconds: 30.0 250 PCT OF CURRENT RATING. 12 specifications are 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.