The Resistor,adjustable, cataloged under National Stock Number 5905-01-221-2289, is classified within Federal Supply Class 5905 (Resistor) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Kurz & Root Generator Company, Llc. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5905-01-221-2289 |
| Primary Part Number | 1281-187-1 |
| Item Name | Resistor,adjustable |
| FSC / FSG | 5905 / 59 — Resistor |
| Manufacturer | Kurz & Root Generator Company, Llc |
| Status | ACTIVE |
| Resistance Tolerance in Percent | -5.000 TO 5.000 |
| Temp Coefficient of Resistance in Ppm Per Deg Celsius | -20.0 TO 20.0 |
| Body Diameter | 0.562 INCHES NOMINAL IN |
| Electrical Resistance | 250.000 OHMS |
| Inclosure Type | UNINCLOSED |
| Terminal Type | BRACKET |
| Reactance Characteristic | INDUCTIVE |
| Temp Range of Temp Coefficient in Deg Celsius | -55.0 TO 375.0 |
| Style Designator | RADIAL TERMINAL EACH END |
| Power Dissipation Rating in Watts | 50.000 FREE AIR |
| Ambient Temp at Full Rated Power | 25.0 CELSIUS DEGC |
| Body Length | 4.000 INCHES NOMINAL IN |
| Ambient Temp in Deg Celsius at Zero Percent Rated Power | 375.0 |
| Reliability Indicator | NOT ESTABLISHED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| D50K250-6101-4 | Ohmite Holding, L.l.c. Dba Ohmite Manufacturing (USA) |
| 1281-187-1 PRIMARY | Kurz & Root Generator Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| 0568-6101-4 | 5/9 Secondary reference Ohmite Holding, L.l.c. Dba Ohmite Manufacturing |
NSN 5905-01-221-2289 is a Resistor,adjustable, manufactured by Kurz & Root Generator Company, Llc, classified under FSC 5905, Resistor. Status: active.
NSN 5905-01-221-2289 has 2 manufacturer part numbers on file: D50K250-6101-4 (Ohmite Holding, L.l.c. Dba Ohmite Manufacturing), 1281-187-1 (Kurz & Root Generator Company, Llc).
Key specifications for 1281-187-1: Resistance Tolerance in Percent: -5.000 TO 5.000; Temp Coefficient of Resistance in Ppm Per Deg Celsius: -20.0 TO 20.0; Body Diameter: 0.562 INCHES NOMINAL IN; Electrical Resistance: 250.000 OHMS. 14 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.