The Fuse,cartridge, cataloged under National Stock Number 5920-01-111-5537, 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 Lockheed Martin Librascope Corporation. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5920-01-111-5537 |
| Primary Part Number | T505 005 906 |
| Item Name | Fuse,cartridge |
| FSC / FSG | 5920 / 59 — Fuses, Arrestors, Absorbers, and Protectors |
| Manufacturer | Lockheed Martin Librascope Corporation |
| Status | ACTIVE |
| Continuous Current Rating in Amps | 2.500 |
| Body Style | TUBE TYPE |
| Overall Diameter | 0.406 INCHES NOMINAL IN |
| Features Provided | NONRENEWABLE FUSIBLE ELEMENT |
| Maximum Voltage Rating in Volts | 600.0 AC |
| Circuit Over-Current Interruption Type | NORMAL INSTANTANEOUS |
| 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 |
|---|---|
| T505 005 906 PRIMARY | Lockheed Martin Librascope Corporation (USA) |
| KTK-2.5 | Cooper Bussmann, Llc Dba Cooper Industries (USA) |
| Reference | Meaning |
|---|---|
| MCL-2.5 | 5/9 Secondary reference Federal Pacific Electric Co Economy Fuse Div |
NSN 5920-01-111-5537 is a Fuse,cartridge, manufactured by Lockheed Martin Librascope Corporation, classified under FSC 5920, Fuses, Arrestors, Absorbers, and Protectors. Status: active.
NSN 5920-01-111-5537 has 2 manufacturer part numbers on file: T505 005 906 (Lockheed Martin Librascope Corporation), KTK-2.5 (Cooper Bussmann, Llc Dba Cooper Industries).
1 possible match (shared part number, not a government interchangeability claim): 5920-01-380-9965. Verify interchangeability with system specifications before substitution.
Key specifications for T505 005 906: Continuous Current Rating in Amps: 2.500; Body Style: TUBE TYPE; Overall Diameter: 0.406 INCHES NOMINAL IN; Overall Length: 1.500 INCHES NOMINAL IN. 6 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.