The Resistor,variable,wire Wound,pre, cataloged under National Stock Number 5905-00-320-9873, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5905-00-320-9873 |
| Primary Part Number | 743-6144 |
| Item Name | Resistor,variable,wire Wound,pre |
| FSC / FSG | 5905 / 59 — Resistor |
| Manufacturer | Servo Instrument Corporation |
| Status | ACTIVE |
| Body Diameter | 2.990 INCHES NOMINAL IN |
| Electrical Resistance Per Section | 10.0 KILOHMS SINGLE SECTION |
| Mounting Lip Depth | 0.0620 INCHES NOMINAL IN |
| Ambient Temp in Deg Celsius Per Section at Zero Percent Rated Power | 80.0 SINGLE SECTION |
| Undercut Width | 0.0620 INCHES NOMINAL IN |
| Section Quantity | 1 |
| Shaft Diameter | 0.2495 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN |
| Undercut Diameter | 2.875 INCHES NOMINAL IN |
| Function Characteristic Per Section | SINGLE SECTION LINEAR |
| Body Style | CYLINDRICAL SERVO MOUNTED |
| Function Conformity Tolerance Per Section | -1.00 TO 1.00 SINGLE SECTION |
| Mounting Method | CLAMP RING(S) |
| Maximum Starting Torque | 6.00 INCH-OUNCES IN |
| Temp Coefficient of Resistance Wire Per Section in Ppm Per Deg Celsius | -20.0 TO 20.0 SINGLE SECTION |
| Terminal Location | RADIALLY POSITIONED OVER LESS THAN HALF THE CIRCUMFERENCE LOCATION NOT OTHERWISE SPECIFIED |
| Mounting Lip Diameter | 2.9900 INCHES NOMINAL IN |
| Shaft Style | ROUND |
| Actuator Type | SINGLE SHAFT |
| Shaft Length | 0.629 INCHES NOMINAL IN |
| Pilot Diameter | 0.2499 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN |
| Body Length | 1.223 INCHES MAXIMUM IN |
| Pilot Length | 0.0620 INCHES NOMINAL IN |
| Power Dissipation Rating Per Section in Watts | 4.0 FREE AIR SINGLE SECTION |
| Effective Electrical Rotation in Deg Angular Rotation | 315.0 NOMINAL |
| Bearing Type | BEARING SHAFT |
| Reliability Indicator | NOT ESTABLISHED |
| Actuator Travel Control Feature | CONTINUOUS MOTION |
| Resistance Tolerance Per Section in Percent | -3.0 TO 3.0 SINGLE SECTION |
| Terminal Type and Quantity | 3 TURRET |
| Rotary Actuator Travel in Angular Deg | 360.0 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 |
|---|---|
| 743-6144 | Servo Instrument Corporation (USA) |
| AP30-C126 | Samarius Precision Instruments, Inc. Dba Samarius Precision Instruments (USA) |
| Reference | Meaning |
|---|---|
| RUP3-956 | 5/9 Secondary reference U.S. Government activity |
| 93856 | 3/9 Design control — primary reference Arma Div Ambac Industries Inc |
| RVP3-S56B | 5/9 Secondary reference U.S. Government activity |
| 300C-13 | 5/9 Secondary reference Samarius Precision Instruments, Inc. Dba Samarius Precision Instruments |
| ANB405 | 5/9 Secondary reference U.S. Government activity |
| 300C-13 | 5/9 Secondary reference Ace Electronics Associates Inc |
NSN 5905-00-320-9873 is a Resistor,variable,wire Wound,pre, manufactured by Servo Instrument Corporation, classified under FSC 5905, Resistor. Status: active.
NSN 5905-00-320-9873 has 2 manufacturer part numbers on file: 743-6144 (Servo Instrument Corporation), AP30-C126 (Samarius Precision Instruments, Inc. Dba Samarius Precision Instruments).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-204-8555. Verify interchangeability with system specifications before substitution.
Key specifications for 743-6144: Body Diameter: 2.990 INCHES NOMINAL IN; Electrical Resistance Per Section: 10.0 KILOHMS SINGLE SECTION; Mounting Lip Depth: 0.0620 INCHES NOMINAL IN; Ambient Temp in Deg Celsius Per Section at Zero Percent Rated Power: 80.0 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.