The Arrester,lightning, cataloged under National Stock Number 5920-00-534-9776, 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 Joslyn Corp. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5920-00-534-9776 |
| Primary Part Number | J9221-QS |
| Item Name | Arrester,lightning |
| FSC / FSG | 5920 / 59 — Fuses, Arrestors, Absorbers, and Protectors |
| Manufacturer | Joslyn Corp |
| Status | ACTIVE |
| Terminal Quantity | 2 |
| Usage Design | OUTDOOR |
| Terminal Type | THREADED STUD |
| Overall Diameter | 2.375 INCHES NOMINAL IN |
| Mounting Method | BRACKET(S) |
| Breakdown Voltage | 27.000 KILOVOLTS MAXIMUM |
| Arrester Type | AIR GAP |
| Body Material | CERAMIC |
| Mounting Configuration | BRACKET MTD |
| 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 |
|---|---|
| J9221-QS PRIMARY | Joslyn Corp (USA) |
| Reference | Meaning |
|---|---|
| J9221QS200 | 5/9 Secondary reference Joslyn Corp |
NSN 5920-00-534-9776 is a Arrester,lightning, manufactured by Joslyn Corp, classified under FSC 5920, Fuses, Arrestors, Absorbers, and Protectors. Status: active.
NSN 5920-00-534-9776 has 1 manufacturer part number on file: J9221-QS (Joslyn Corp).
Key specifications for J9221-QS: Terminal Quantity: 2; Usage Design: OUTDOOR; Terminal Type: THREADED STUD; Overall Diameter: 2.375 INCHES NOMINAL IN. 9 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.