The Thermometer,self-Indicating, cataloged under National Stock Number 6685-01-378-6629, 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 Kessler Thermometers Corporation Dba Ruttco Division. Government technical data includes 3 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 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 | 6685-01-378-6629 |
| Primary Part Number | 3304T |
| Item Name | Thermometer,self-Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Kessler Thermometers Corporation Dba Ruttco Division |
| Status | ACTIVE |
| Style Designator | IMMERSION RING TOP |
| Actuating Medium | ALCOHOL |
| Immersion Length | 305.0 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| 3304T PRIMARY | Kessler Thermometers Corporation Dba Ruttco Division (USA) |
NSN 6685-01-378-6629 is a Thermometer,self-Indicating, manufactured by Kessler Thermometers Corporation Dba Ruttco Division, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-378-6629 has 1 manufacturer part number on file: 3304T (Kessler Thermometers Corporation Dba Ruttco Division).
1 possible match (shared part number, not a government interchangeability claim): 2815-01-388-3304. Verify interchangeability with system specifications before substitution.
Key specifications for 3304T: Style Designator: IMMERSION RING TOP; Overall Length: 305.0 MILLIMETERS NOMINAL MM; Actuating Medium: ALCOHOL; Immersion Length: 305.0 MILLIMETERS NOMINAL MM. 3 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.