The Resistor,variable,wire Wound,pre, cataloged under National Stock Number 5905-00-552-7221, is classified within Federal Supply Class 5905 (Resistor) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Lockheed Martin Corporation Div Rms. Government technical data includes 29 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5905-00-552-7221 |
| Primary Part Number | 478280-1 |
| Item Name | Resistor,variable,wire Wound,pre |
| FSC / FSG | 5905 / 59 — Resistor |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Maximum Running Torque | 1.00 INCH-OUNCES IN |
| Body Diameter | 3.000 INCHES NOMINAL IN |
| Lateral Runout | 0.002 INCHES IN |
| Electrical Resistance Per Section | 50.000 KILOHMS ALL SECTIONS |
| Ambient Temp in Deg Celsius Per Section at Zero Percent Rated Power | 85.0 ALL SECTIONS |
| Section Quantity | 2 |
| Shaft Diameter | 0.250 INCHES NOMINAL IN |
| Function Characteristic Per Section | ALL SECTIONS LINEAR |
| Body Style | CYLINDRICAL BUSHING MOUNTED |
| Function Conformity Tolerance Per Section | -0.02 TO 0.02 ALL SECTIONS |
| Shaft End Play | 0.00100 INCHES IN |
| Overall Diameter | 3.000 INCHES NOMINAL IN |
| Mounting Method | CLAMP RING(S) |
| Maximum Starting Torque | 4.00 INCH-OUNCES IN |
| Terminal Location | REAR END LOCATION NOT OTHERWISE SPECIFIED |
| Shaft Style | ROUND |
| Actuator Type | SINGLE SHAFT |
| Shaft Length | 1.000 INCHES NOMINAL IN |
| Body Length | 4.000 INCHES NOMINAL IN |
| Maximum Stop Torque | 4.00 INCH-OUNCES IN |
| Shaft Runout | 0.002 INCHES IN |
| Power Dissipation Rating Per Section in Watts | 8.0 FREE AIR ALL SECTIONS |
| Effective Electrical Rotation in Deg Angular Rotation | 3600.0 NOMINAL |
| Pilot Diameter Runout | 0.00150 INCHES IN |
| Bearing Type | BEARING SHAFT |
| Reliability Indicator | NOT ESTABLISHED |
| Shaft Radial Play | 0.002 INCHES IN |
| Actuator Travel Control Feature | CLUTCH |
| Resistance Tolerance Per Section in Percent | -1.0 TO 1.0 ALL SECTIONS |
| 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 |
|---|---|
| 478280-1 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| 7609-81-0 | Bi Technologies Corporation Div Bi Technologies Corp. (USA) |
| Reference | Meaning |
|---|---|
| 478280-1 | 5/9 Secondary reference Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin |
| M410154 | 5/9 Secondary reference U.S. Government activity |
NSN 5905-00-552-7221 is a Resistor,variable,wire Wound,pre, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5905, Resistor. Status: active.
NSN 5905-00-552-7221 has 2 manufacturer part numbers on file: 478280-1 (Lockheed Martin Corporation Div Rms), 7609-81-0 (Bi Technologies Corporation Div Bi Technologies Corp.).
2 possible matches (shared part number, not a government interchangeability claim): 5998-01-029-2526, 5940-01-345-7140. Verify interchangeability with system specifications before substitution.
Key specifications for 478280-1: Maximum Running Torque: 1.00 INCH-OUNCES IN; Body Diameter: 3.000 INCHES NOMINAL IN; Lateral Runout: 0.002 INCHES IN; Electrical Resistance Per Section: 50.000 KILOHMS ALL SECTIONS. 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.