The Resistor,variable,wire Wound,pre, cataloged under National Stock Number 5905-01-388-2939, is classified within Federal Supply Class 5905 (Resistor) of the Electrical and Electronic Equipment Components group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5905-01-388-2939 |
| Item Name | Resistor,variable,wire Wound,pre |
| FSC / FSG | 5905 / 59 — Resistor |
| Status | ACTIVE |
| Body Diameter | 0.906 INCHES NOMINAL IN |
| Screw Thread Quantity Per Inch | 32.0 |
| Electrical Resistance Per Section | 5.0 KILOHMS SINGLE SECTION |
| Section Quantity | 1 |
| Shaft Diameter | 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Body Style | CYLINDRICAL BUSHING MOUNTED |
| Mounting Method | CLAMP RING(S) AND STANDARD BUSHING |
| Terminal Location | RADIALLY POSITIONED OVER LESS THAN HALF THE CIRCUMFERENCE LOCATION NOT OTHERWISE SPECIFIED |
| Features Provided | HUMIDITY PROOF |
| Shaft Style | ROUND, SLOTTED |
| Actuator Type | SINGLE SHAFT |
| Shaft Length | 0.719 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN |
| Specification/standard Data | 81349-MIL-R-12934/28 GOVERNMENT SPECIFICATION |
| Body Length | 1.076 INCHES MAXIMUM IN |
| Power Dissipation Rating Per Section in Watts | 1.5 FREE AIR SINGLE SECTION |
| Screw Thread Diameter | 0.250 INCHES NOMINAL IN |
| Reliability Indicator | NOT ESTABLISHED |
| Screw Thread Series Designator | UNEF |
| Test Data Document | 81349-MIL-R-12934 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Resistance Tolerance Per Section in Percent | -3.0 TO 3.0 SINGLE SECTION |
| Terminal Type and Quantity | 3 TAB, SOLDER LUG |
| Mounting Bushing Length | 0.230 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| RR3700D2C7G502 | 2/2 Government specification standardization U.S. Government activity |
| MIL-R-12934/28 | 5/9 Secondary reference U.S. Government activity |
| MIL-PRF-12934/28 | 4/1 Identification reference U.S. Government activity |
NSN 5905-01-388-2939 is a Resistor,variable,wire Wound,pre, classified under FSC 5905, Resistor. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5905-01-425-5501. Verify interchangeability with system specifications before substitution.
Key specifications for 5905-01-388-2939: Body Diameter: 0.906 INCHES NOMINAL IN; Screw Thread Quantity Per Inch: 32.0; Electrical Resistance Per Section: 5.0 KILOHMS SINGLE SECTION; Section Quantity: 1. 22 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.