The Thermometer,self-Indicating, cataloged under National Stock Number 6685-00-243-9955, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6685-00-243-9955 |
| Item Name | Thermometer,self-Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| Design Type | FLUCTUATING |
| Scale Inscription/background Color | BLACK MARKING ON WHITE BACKGROUND |
| Scale Smallest Increment | 1.0 DEG CELSIUS AND 2.0 DEG FAHRENHEIT |
| Actuating Medium | MERCURY |
| Features Provided | EXPANSION CHAMBER |
| Immersion Length | 3.000 INCHES NOMINAL IN |
| Scale Type | ETCHED STEM |
| Scale Measurement Range | +20.000 TO 400.000 DEG FAHRENHEIT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| B1465 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6685-00-243-9955 is a Thermometer,self-Indicating, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4140-01-579-7223. Verify interchangeability with system specifications before substitution.
Key specifications for 6685-00-243-9955: Design Type: FLUCTUATING; Scale Inscription/background Color: BLACK MARKING ON WHITE BACKGROUND; Scale Smallest Increment: 1.0 DEG CELSIUS AND 2.0 DEG FAHRENHEIT; Overall Length: 14.000 INCHES NOMINAL IN. 8 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.