The Resistor,variable,wire Wound,pre, cataloged under National Stock Number 5905-00-958-7532, 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 29 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5905-00-958-7532 |
| Primary Part Number | 18W1-2498 |
| 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 | 1.125 INCHES NOMINAL IN |
| Lateral Runout | 0.001 INCHES IN |
| Electrical Resistance Per Section | 20.0 KILOHMS SINGLE SECTION |
| Mounting Lip Depth | 0.0620 INCHES NOMINAL IN |
| Ambient Temp in Deg Celsius Per Section at Zero Percent Rated Power | 150.0 SINGLE SECTION |
| Undercut Width | 0.0620 INCHES NOMINAL IN |
| Section Quantity | 1 |
| Shaft Diameter | 0.250 INCHES NOMINAL IN |
| Undercut Diameter | 1.000 INCHES NOMINAL IN |
| Function Characteristic Per Section | SINGLE SECTION LINEAR |
| Body Style | CYLINDRICAL SERVO MOUNTED |
| Function Conformity Tolerance Per Section | -0.50 TO 0.50 SINGLE SECTION |
| Shaft End Play | 0.006 INCHES IN |
| Overall Diameter | 1.374 INCHES NOMINAL IN |
| Mounting Method | CLAMP RING(S) |
| Temp Coefficient of Resistance Per Section in Ppm Per Deg Celsius | -50.0 TO 50.0 SINGLE SECTION |
| Terminal Location | RADIALLY POSITIONED OVER LESS THAN HALF THE CIRCUMFERENCE LOCATION NOT OTHERWISE SPECIFIED |
| Mounting Lip Diameter | 1.1250 INCHES NOMINAL IN |
| Shaft Style | ROUND |
| Actuator Type | SINGLE SHAFT |
| Shaft Length | 0.875 INCHES NOMINAL IN |
| Pilot Diameter | 0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN |
| Body Length | 0.797 INCHES NOMINAL IN |
| Maximum Stop Torque | 128.00 INCH-OUNCES IN |
| Shaft Runout | 0.003 INCHES IN |
| Pilot Length | 0.0320 INCHES NOMINAL IN |
| Power Dissipation Rating Per Section in Watts | 6.0 FREE AIR SINGLE SECTION |
| Effective Electrical Rotation in Deg Angular Rotation | 340.0 NOMINAL |
| 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 |
|---|---|
| 18W1-2498 | Servo Instrument Corporation (USA) |
| Reference | Meaning |
|---|---|
| 138-029-2035 | 3/2 Design control — primary reference U.S. Government activity |
| WP1-1-8 | 5/9 Secondary reference Data Instruments Inc |
| 730196 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| WP1-1-8 | 5/9 Secondary reference U.S. Government activity |
NSN 5905-00-958-7532 is a Resistor,variable,wire Wound,pre, manufactured by Servo Instrument Corporation, classified under FSC 5905, Resistor. Status: active.
NSN 5905-00-958-7532 has 1 manufacturer part number on file: 18W1-2498 (Servo Instrument Corporation).
Key specifications for 18W1-2498: Maximum Running Torque: 1.75 INCH-OUNCES IN; Body Diameter: 1.125 INCHES NOMINAL IN; Lateral Runout: 0.001 INCHES IN; Electrical Resistance Per Section: 20.0 KILOHMS SINGLE SECTION. 29 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.