The Resistor,variable,wire Wound,pre, cataloged under National Stock Number 5905-00-752-6916, is classified within Federal Supply Class 5905 (Resistor) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Servo Instrument Corporation. Government technical data includes 30 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5905-00-752-6916 |
| Primary Part Number | 20A1-2390 |
| Item Name | Resistor,variable,wire Wound,pre |
| FSC / FSG | 5905 / 59 — Resistor |
| Manufacturer | Servo Instrument Corporation |
| Status | ACTIVE |
| Maximum Running Torque | 1.75 INCH-OUNCES IN |
| Body Diameter | 1.250 INCHES NOMINAL IN |
| Screw Thread Quantity Per Inch | 40.0 |
| Electrical Resistance Per Section | 5.000 OHMS SINGLE SECTION |
| Ambient Temp in Deg Celsius Per Section at Zero Percent Rated Power | 100.0 SINGLE SECTION |
| Section Quantity | 1 |
| Mounting Facility Quantity | 2 |
| Shaft Diameter | 0.250 INCHES NOMINAL IN |
| Function Characteristic Per Section | SINGLE SECTION LINEAR |
| Body Style | CYLINDRICAL HOLE/SLOT MOUNTED |
| Function Conformity Tolerance Per Section | -2.00 TO 2.00 SINGLE SECTION |
| Mounting Hole/stud Circle Diameter | 0.750 INCHES NOMINAL IN |
| Special Test Features | KNOB INCLUDED |
| Mounting Method | THREADED HOLE(S) |
| Maximum Starting Torque | 1.75 INCH-OUNCES IN |
| Fixed Tap Quantity Per Section | 1 SINGLE SECTION |
| Terminal Location | RADIALLY POSITIONED OVER LESS THAN HALF THE CIRCUMFERENCE LOCATION NOT OTHERWISE SPECIFIED |
| Shaft Style | ROUND |
| Actuator Type | SINGLE SHAFT |
| Shaft Length | 1.000 INCHES NOMINAL IN |
| Body Length | 0.625 INCHES NOMINAL IN |
| Tap Location Tolerance Per Section | -2.0 TO 2.0 DEG ANGULAR ROTATION SINGLE SECTION |
| Power Dissipation Rating Per Section in Watts | 3.5 FREE AIR SINGLE SECTION |
| Effective Electrical Rotation in Deg Angular Rotation | 315.0 NOMINAL |
| Screw Thread Diameter | 0.112 INCHES NOMINAL IN |
| Reliability Indicator | NOT ESTABLISHED |
| Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Actuator Travel Control Feature | STOPS |
| Tap Location From Ccw Terminal Per Section in Deg of Effective Electrical Rotation | 158.0 SINGLE SECTION |
| Resistance Tolerance Per Section in Percent | -5.0 TO 5.0 SINGLE SECTION |
| 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 |
|---|---|
| 20A1-2390 | Servo Instrument Corporation (USA) |
| Reference | Meaning |
|---|---|
| 971C | 3/9 Design control — primary reference Genrad Inc |
NSN 5905-00-752-6916 is a Resistor,variable,wire Wound,pre, manufactured by Servo Instrument Corporation, classified under FSC 5905, Resistor. Status: active.
NSN 5905-00-752-6916 has 1 manufacturer part number on file: 20A1-2390 (Servo Instrument Corporation).
Key specifications for 20A1-2390: Maximum Running Torque: 1.75 INCH-OUNCES IN; Body Diameter: 1.250 INCHES NOMINAL IN; Screw Thread Quantity Per Inch: 40.0; Electrical Resistance Per Section: 5.000 OHMS SINGLE SECTION. 30 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.