The Fuseholder,block, cataloged under National Stock Number 5920-01-399-4522, 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 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5920-01-399-4522 |
| Primary Part Number | 1257AS106-1 |
| Item Name | Fuseholder,block |
| FSC / FSG | 5920 / 59 — Fuses, Arrestors, Absorbers, and Protectors |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Body Width | 2.000 MILLIMETERS NOMINAL MM |
| Fuse Accommodation Quantity | 1 |
| 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 |
|---|---|
| 1257AS106-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 1257AS106-1 | Deval Life Cycle Support Llc (USA) |
| A14987 | Autodyne Manufacturing Co Inc (USA) |
| 1257AS106-1 | Bright Lights Usa, Inc Dba Blusa Defense Manufacturing (USA) |
NSN 5920-01-399-4522 is a Fuseholder,block, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5920, Fuses, Arrestors, Absorbers, and Protectors. Status: active.
NSN 5920-01-399-4522 has 4 manufacturer part numbers on file: 1257AS106-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 1257AS106-1 (Deval Life Cycle Support Llc), A14987 (Autodyne Manufacturing Co Inc), 1257AS106-1 (Bright Lights Usa, Inc Dba Blusa Defense Manufacturing).
Key specifications for 1257AS106-1: Overall Height: 1.000 MILLIMETERS NOMINAL MM; Body Width: 2.000 MILLIMETERS NOMINAL MM; Overall Length: 3.000 MILLIMETERS NOMINAL MM; Overall Width: 2.000 MILLIMETERS NOMINAL MM. 2 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.