The Resistor,variable,wire Wound,pre, cataloged under National Stock Number 5905-00-907-3850, is classified within Federal Supply Class 5905 (Resistor) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Aimtron Systems, Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5905-00-907-3850 |
| Primary Part Number | 400240 |
| Item Name | Resistor,variable,wire Wound,pre |
| FSC / FSG | 5905 / 59 — Resistor |
| Manufacturer | Aimtron Systems, Llc |
| Status | ACTIVE |
| Maximum Running Torque | 1.50 INCH-OUNCES IN |
| Body Diameter | 1.750 INCHES NOMINAL IN |
| Screw Thread Quantity Per Inch | 32.0 |
| Lateral Runout | 0.002 INCHES IN |
| Electrical Resistance Per Section | 20.0 KILOHMS SINGLE SECTION |
| Section Quantity | 1 |
| Mounting Facility Quantity | 2 |
| Shaft Diameter | 0.250 INCHES NOMINAL IN |
| Function Characteristic Per Section | SINGLE SECTION EQUATION |
| Body Style | CYLINDRICAL HOLE/SLOT MOUNTED |
| Function Conformity Tolerance Per Section | -0.50 TO 0.50 SINGLE SECTION |
| Shaft End Play | 0.005 INCHES IN |
| Overall Diameter | 1.906 INCHES NOMINAL IN |
| Mounting Hole/stud Circle Diameter | 1.250 INCHES NOMINAL IN |
| Mounting Method | THREADED HOLE(S) |
| Maximum Starting Torque | 1.50 INCH-OUNCES IN |
| Terminal Location | RADIALLY POSITIONED OVER MORE THAN HALF THE CIRCUMFERENCE LOCATION NOT OTHERWISE SPECIFIED |
| Features Provided | NONMETALLIC SHAFT |
| Shaft Style | ROUND |
| Actuator Type | SINGLE SHAFT |
| Shaft Length | 1.000 INCHES NOMINAL IN |
| Body Length | 0.959 INCHES MAXIMUM IN |
| Shaft Runout | 0.001 INCHES IN |
| Effective Electrical Rotation in Deg Angular Rotation | 316.0 NOMINAL |
| Pilot Diameter Runout | 0.0015 INCHES IN |
| Screw Thread Diameter | 0.138 INCHES NOMINAL IN |
| Bearing Type | BEARING SHAFT |
| Reliability Indicator | NOT ESTABLISHED |
| Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 400240 PRIMARY | Aimtron Systems, Llc (USA) |
| Reference | Meaning |
|---|---|
| 400240 | 5/9 Secondary reference Cardion Inc |
NSN 5905-00-907-3850 is a Resistor,variable,wire Wound,pre, manufactured by Aimtron Systems, Llc, classified under FSC 5905, Resistor. Status: active.
NSN 5905-00-907-3850 has 1 manufacturer part number on file: 400240 (Aimtron Systems, Llc).
1 possible match (shared part number, not a government interchangeability claim): 6680-01-491-8425. Verify interchangeability with system specifications before substitution.
Key specifications for 400240: Maximum Running Torque: 1.50 INCH-OUNCES IN; Body Diameter: 1.750 INCHES NOMINAL IN; Screw Thread Quantity Per Inch: 32.0; Lateral Runout: 0.002 INCHES IN. 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.