The Fuse,cartridge, cataloged under National Stock Number 5920-01-433-1074, 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 Littelfuse, Inc.. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5920-01-433-1074 |
| Primary Part Number | KLK-4A |
| Item Name | Fuse,cartridge |
| FSC / FSG | 5920 / 59 — Fuses, Arrestors, Absorbers, and Protectors |
| Manufacturer | Littelfuse, Inc. |
| Status | ACTIVE |
| Continuous Current Rating in Amps | 4.000 |
| Body Style | TUBE TYPE |
| Overall Diameter | 0.406 INCHES NOMINAL IN |
| Interruption Indicator Method | OPAQUE BODY |
| Features Provided | RENEWABLE 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 |
|---|---|
| KLK-4 | Littelfuse Uk Ltd (GBR) |
| 10330-A PN17 | Barksdale Inc (USA) |
| KLK-4A PRIMARY | Littelfuse, Inc. (USA) |
| Reference | Meaning |
|---|---|
| KLK-4 | C/1 Advisory reference — outside the item-of-supply concept Littelfuse, Inc. |
| 593-6961260 PC 149 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 5920-01-433-1074 is a Fuse,cartridge, manufactured by Littelfuse, Inc., classified under FSC 5920, Fuses, Arrestors, Absorbers, and Protectors. Status: active.
NSN 5920-01-433-1074 has 3 manufacturer part numbers on file: KLK-4 (Littelfuse Uk Ltd), 10330-A PN17 (Barksdale Inc), KLK-4A (Littelfuse, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5920-01-477-8894. Verify interchangeability with system specifications before substitution.
Key specifications for KLK-4A: Continuous Current Rating in Amps: 4.000; Body Style: TUBE TYPE; Overall Diameter: 0.406 INCHES NOMINAL IN; Overall Length: 1.500 INCHES NOMINAL IN. 7 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.