The Resistor,variable,nonwire Wound,, cataloged under National Stock Number 5905-01-121-2143, is classified within Federal Supply Class 5905 (Resistor) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc. Government technical data includes 27 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5905-01-121-2143 |
| Primary Part Number | KAY338B |
| Item Name | Resistor,variable,nonwire Wound, |
| FSC / FSG | 5905 / 59 — Resistor |
| Manufacturer | Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc |
| Status | ACTIVE |
| Maximum Running Torque | 5.00 INCH-OUNCES IN |
| Electrical Resistance Per Section | 2.0 KILOHMS SINGLE SECTION |
| Ambient Temp in Deg Celsius Per Section at Zero Percent Rated Power | 150.0 SINGLE SECTION |
| Section Quantity | 1 |
| Mounting Facility Quantity | 2 |
| Shaft Diameter | 0.125 INCHES NOMINAL IN |
| Body Style | RECTANGULAR W/MOUNTING HOLES/SLOTS |
| Terminal Length | 0.500 INCHES NOMINAL IN |
| Mounting Method | TERMINAL AND UNTHREADED HOLE(S) |
| Body Width | 0.195 INCHES NOMINAL IN |
| Body Height | 0.325 INCHES NOMINAL IN |
| Maximum Starting Torque | 5.00 INCH-OUNCES IN |
| Mounting Hole Diameter | 0.093 INCHES NOMINAL IN |
| Temp Coefficient of Resistance Per Section in Ppm Per Deg Celsius | -10.0 TO 10.0 SINGLE SECTION |
| Terminal Location | LOWER ADJACENT SIDE TWO ROWS |
| Center to Center Distance Between Center Terminal and Outside Terminal | 0.300 INCHES NOMINAL IN |
| Features Provided | HUMIDITY PROOF |
| Shaft Style | ROUND, SLOTTED |
| Actuator Type | SINGLE SHAFT |
| Lateral Distance Between Mounting Hole Centers | 1.000 INCHES NOMINAL IN |
| Center to Center Distance Between Terminal Rows | 0.100 INCHES NOMINAL IN |
| Shaft Length | 0.070 INCHES NOMINAL IN |
| Body Length | 1.250 INCHES NOMINAL IN |
| Center to Center Distance Between Terminals | 0.700 INCHES NOMINAL IN |
| Power Dissipation Rating Per Section in Watts | 0.5 FREE AIR SINGLE SECTION |
| Effective Electrical Rotation in Deg Angular Rotation | 9000.0 NOMINAL |
| 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 |
|---|---|
| KAY338B PRIMARY | Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| 1202-Y-2K | 5/1 Secondary reference Vishay Intertechnology, Inc. |
| LO3121 | 5/9 Secondary reference Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) |
| KAY338B | 5/9 Secondary reference Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution |
NSN 5905-01-121-2143 is a Resistor,variable,nonwire Wound,, manufactured by Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc, classified under FSC 5905, Resistor. Status: active.
NSN 5905-01-121-2143 has 1 manufacturer part number on file: KAY338B (Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc).
Key specifications for KAY338B: Maximum Running Torque: 5.00 INCH-OUNCES IN; Overall Height: 0.825 INCHES NOMINAL IN; Electrical Resistance Per Section: 2.0 KILOHMS SINGLE SECTION; Ambient Temp in Deg Celsius Per Section at Zero Percent Rated Power: 150.0 SINGLE SECTION. 27 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.