The Arrester,lightning, cataloged under National Stock Number 5920-01-478-3277, 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 Harger Inc Dba Harger Lightning Protection Inc. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5920-01-478-3277 |
| Primary Part Number | IS-MF50LN |
| Item Name | Arrester,lightning |
| FSC / FSG | 5920 / 59 — Fuses, Arrestors, Absorbers, and Protectors |
| Manufacturer | Harger Inc Dba Harger Lightning Protection Inc |
| Status | ACTIVE |
| Terminal Quantity | 2 |
| Usage Design | OUTDOOR |
| Terminal Type | CONNECTOR, RECEPTACLE |
| Supplementary Features | CONNECTORS ARE N TYPE W/SILVER SHELL AND GOLD CENTER PIN IAW MIL-C-39012 |
| Arrester Type | AIR GAP |
| Body Material | ALUMINUM |
| 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 |
|---|---|
| 297856-003 | The Charles Stark Draper Laboratory, Inc. Div Headquarters (USA) |
| IS-MF50LN PRIMARY | Harger Inc Dba Harger Lightning Protection Inc (USA) |
NSN 5920-01-478-3277 is a Arrester,lightning, manufactured by Harger Inc Dba Harger Lightning Protection Inc, classified under FSC 5920, Fuses, Arrestors, Absorbers, and Protectors. Status: active.
NSN 5920-01-478-3277 has 2 manufacturer part numbers on file: 297856-003 (The Charles Stark Draper Laboratory, Inc. Div Headquarters), IS-MF50LN (Harger Inc Dba Harger Lightning Protection Inc).
Key specifications for IS-MF50LN: Overall Height: 1.438 INCHES NOMINAL IN; Terminal Quantity: 2; Usage Design: OUTDOOR; Terminal Type: CONNECTOR, RECEPTACLE. 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.