The Switch,thermostatic, cataloged under National Stock Number 5930-00-349-7017, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Ranco Inc Ranco Controls Div. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5930-00-349-7017 |
| Primary Part Number | TRM3221 |
| Item Name | Switch,thermostatic |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Ranco Inc Ranco Controls Div |
| Status | ACTIVE |
| Contact Action Stimulus | INCREASE |
| Terminal Type | SCREW |
| Bulb Length | 4.000 INCHES NOMINAL IN |
| Bulb Diameter | 0.875 INCHES NOMINAL IN |
| Contact Load Current Rating | 1.0 AMPERES RESISTIVE LOAD SECOND VOLTAGE |
| Contact Load Current Rating | 4.6 AMPERES RESISTIVE LOAD FIRST VOLTAGE |
| Contact Load Current Rating | 520.0 MILLIAMPERES RESISTIVE LOAD THIRD VOLTAGE |
| Mounting Method | BRACKET(S) |
| Contact Adjustment Range | +50.00 TO 250.00 ACTUATION POINT DEGREES FAHRENHEIT |
| Temp Sensing Element Type | CAPILLARY TUBE-BULB |
| Contact Adjustment Type | EXTERNAL ACTUATION POINT KNOB |
| Capillary Tube Length | 72.000 INCHES NOMINAL IN |
| Nonpile-Up Contact Arrangement | 2 POLE, SINGLE THROW, NORMALLY CLOSED, MOMENTARY ACTION |
| Contact Stimulus Rating | 2.00 DIFFERENTIAL POINT NOMINAL DEGREES FAHRENHEIT |
| Contact Adjustability | ACTUATION POINT ADJUSTABLE, PRESET |
| Contact Voltage Rating in Volts | 240.0 AC AT SEA LEVEL FIRST VOLTAGE |
| Contact Voltage Rating in Volts | 240.0 DC AT SEA LEVEL THIRD VOLTAGE |
| Contact Voltage Rating in Volts | 120.0 DC AT SEA LEVEL SECOND VOLTAGE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| TRM3221 PRIMARY | Ranco Inc Ranco Controls Div (USA) |
| Reference | Meaning |
|---|---|
| TRM3221 | 5/9 Secondary reference Federal Equipment and Manufacturing Co., Inc. Div Federal Equipment & Manufacturing Co., Inc. |
NSN 5930-00-349-7017 is a Switch,thermostatic, manufactured by Ranco Inc Ranco Controls Div, classified under FSC 5930, Switches. Status: active.
NSN 5930-00-349-7017 has 1 manufacturer part number on file: TRM3221 (Ranco Inc Ranco Controls Div).
Key specifications for TRM3221: Overall Height: 3.406 INCHES NOMINAL IN; Contact Action Stimulus: INCREASE; Terminal Type: SCREW; Bulb Length: 4.000 INCHES NOMINAL IN. 18 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.