The Resistor,variable,wire Wound,non, cataloged under National Stock Number 5905-00-877-5501, is classified within Federal Supply Class 5905 (Resistor) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Senior Calorstat. Government technical data includes 22 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5905-00-877-5501 |
| Primary Part Number | 49M9-500HMS |
| Item Name | Resistor,variable,wire Wound,non |
| FSC / FSG | 5905 / 59 — Resistor |
| Manufacturer | Senior Calorstat |
| Status | ACTIVE |
| Nonturn Device Location | AT 9 OCLOCK |
| Body Diameter | 0.891 INCHES MAXIMUM IN |
| Screw Thread Quantity Per Inch | 32.0 |
| Electrical Resistance Per Section | 50.0 OHMS SINGLE SECTION |
| Section Quantity | 1 |
| Shaft Diameter | 0.125 INCHES NOMINAL IN |
| Nonturn Device Radius | 0.234 INCHES NOMINAL IN |
| Body Style | CYLINDRICAL BUSHING MOUNTED |
| Mounting Method | STANDARD BUSHING |
| Terminal Location | RADIALLY POSITIONED OVER LESS THAN HALF THE CIRCUMFERENCE LOCATION NOT OTHERWISE SPECIFIED |
| Shaft Style | ROUND, SLOTTED |
| Actuator Type | SINGLE SHAFT |
| Shaft Length | 0.437 INCHES NOMINAL IN |
| Body Length | 0.547 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 |
| Resistance Tolerance Per Section in Percent | -5.0 TO 5.0 SINGLE SECTION |
| Terminal Type and Quantity | 3 TAB, SOLDER LUG |
| Mounting Bushing Length | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Ambient Temp in Deg Celsius Per Section at Full Rated Power | 40.0 SINGLE SECTION |
| 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 |
|---|---|
| 49M9-500HMS | Senior Calorstat (FRA) |
| 49M9-500HM | Senior Calorstat (FRA) |
| Reference | Meaning |
|---|---|
| 49M9-500HM | 3/9 Design control — primary reference Clarostat Sensors and Controls |
| 832440 | 5/9 Secondary reference Ordnance Supply Office |
NSN 5905-00-877-5501 is a Resistor,variable,wire Wound,non, manufactured by Senior Calorstat, classified under FSC 5905, Resistor. Status: active.
NSN 5905-00-877-5501 has 2 manufacturer part numbers on file: 49M9-500HMS (Senior Calorstat), 49M9-500HM (Senior Calorstat).
Key specifications for 49M9-500HMS: Nonturn Device Location: AT 9 OCLOCK; Body Diameter: 0.891 INCHES MAXIMUM IN; Screw Thread Quantity Per Inch: 32.0; Electrical Resistance Per Section: 50.0 OHMS SINGLE SECTION. 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.