The Control,temperature,indicating, cataloged under National Stock Number 6685-01-646-3000, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Detroit Switch Inc Dba Detroit Switch Inc. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 6685-01-646-3000 |
| Primary Part Number | 221-2PD-22100-5 |
| Item Name | Control,temperature,indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Detroit Switch Inc Dba Detroit Switch Inc |
| Status | ACTIVE |
| Inclosure Type | ENCASED |
| Maximum Overall Length | 5.125 INCHES IN |
| Operating Temp Range | -40.0 TO 90.0 FAHRENHEIT DEGF |
| Material | STEEL CASE |
| 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 |
|---|---|
| 221-2PD-22100-5 PRIMARY | Detroit Switch Inc Dba Detroit Switch Inc (USA) |
| Reference | Meaning |
|---|---|
| TS-1617 REV K | D/9 Drawing number reference only Detroit Switch Inc Dba Detroit Switch Inc |
NSN 6685-01-646-3000 is a Control,temperature,indicating, manufactured by Detroit Switch Inc Dba Detroit Switch Inc, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-646-3000 has 1 manufacturer part number on file: 221-2PD-22100-5 (Detroit Switch Inc Dba Detroit Switch Inc).
Key specifications for 221-2PD-22100-5: Inclosure Type: ENCASED; Maximum Overall Length: 5.125 INCHES IN; Special Features: DESCRIPTION: HEATING SWITCH: CLOSE ON DECREASE; COOLING SWITCH: CLOSE ON DECREASE; VOLTAGE 115; AC: 3.8; DC: 0.2; RESISTANT LOCKABLE COVER P/N 22156 IS OPTIONAL; Operating Temp Range: -40.0 TO 90.0 FAHRENHEIT DEGF. 4 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.