The Resistor,fixed,wire Wound, cataloged under National Stock Number 5905-00-256-3296, is classified within Federal Supply Class 5905 (Resistor) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Ward Leonard Ct Llc. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5905-00-256-3296 |
| Primary Part Number | T40018-550 |
| Item Name | Resistor,fixed,wire Wound |
| FSC / FSG | 5905 / 59 — Resistor |
| Manufacturer | Ward Leonard Ct Llc |
| Status | ACTIVE |
| Resistance Tolerance in Percent | -5.000 TO 5.000 |
| Body Diameter | 0.438 INCHES NOMINAL IN |
| Electrical Resistance | 550.000 OHMS |
| Inclosure Type | ENCAPSULATED |
| Terminal Type | TAB, SOLDER LUG |
| Terminal Length | 0.438 INCHES NOMINAL IN |
| Style Designator | RADIAL TERMINAL EACH END |
| Power Dissipation Rating in Watts | 10.000 FREE AIR |
| Ambient Temp at Full Rated Power | 40.0 CELSIUS DEGC |
| Body Length | 1.500 INCHES NOMINAL IN |
| Ambient Temp in Deg Celsius at Zero Percent Rated Power | 340.0 |
| Reliability Indicator | NOT ESTABLISHED |
| 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 |
|---|---|
| T40018-550 PRIMARY | Ward Leonard Ct Llc (USA) |
| Reference | Meaning |
|---|---|
| 1 1-2IN0 | 3/1 Design control — primary reference Ward Leonard Ct Llc |
| 1 1-2INCH0 | 3/1 Design control — primary reference Ward Leonard Ct Llc |
NSN 5905-00-256-3296 is a Resistor,fixed,wire Wound, manufactured by Ward Leonard Ct Llc, classified under FSC 5905, Resistor. Status: active.
NSN 5905-00-256-3296 has 1 manufacturer part number on file: T40018-550 (Ward Leonard Ct Llc).
1 possible match (shared part number, not a government interchangeability claim): 5905-00-279-9500. Verify interchangeability with system specifications before substitution.
Key specifications for T40018-550: Resistance Tolerance in Percent: -5.000 TO 5.000; Body Diameter: 0.438 INCHES NOMINAL IN; Electrical Resistance: 550.000 OHMS; Inclosure Type: ENCAPSULATED. 12 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.