The Thermometer,indicating,capillary, cataloged under National Stock Number 6685-01-161-6653, 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 Ashcroft Inc Dba Heise. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-161-6653 |
| Primary Part Number | 45-T8478K-51E-000-0150-50-500F |
| Item Name | Thermometer,indicating,capillary |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Flexible Tube Length | 180.000 INCHES NOMINAL IN |
| Bulb Type | PLAIN RIGID |
| Scale Inscription/background Color | BLACK MARKING ON YELLOW BACKGROUND |
| Scale Smallest Increment | 5.0 DEG FAHRENHEIT |
| Bulb Connection Type | UNION |
| Dial Diameter | 4.500 INCHES NOMINAL IN |
| Indicator Connection Method | FLEXIBLE TUBE |
| Actuating Medium | GAS |
| Pointer/pen Type and Quantity | 1 INDICATING SINGLE AND 1 REFERENCE SINGLE |
| Scale Type | DIAL |
| Nondefinitive Spec/std Data | C CLASS |
| Scale Measurement Range | +50.000 TO 550.000 DEG FAHRENHEIT |
| Bulb Quantity | 1 |
| Material | STEEL CORROSION RESISTING BULB |
| 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 |
|---|---|
| 45-T8478K-51E-000-0150-50-500F PRIMARY | Ashcroft Inc Dba Heise (USA) |
| 45-T8478K-51E-000-0150-50-550F | Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc (USA) |
| Reference | Meaning |
|---|---|
| 45-T8478K-51E-0150-50-550F | 5/9 Secondary reference Ashcroft Inc Dba Heise |
| MIL-T-19646 | 4/1 Identification reference U.S. Government activity |
NSN 6685-01-161-6653 is a Thermometer,indicating,capillary, manufactured by Ashcroft Inc Dba Heise, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-161-6653 has 2 manufacturer part numbers on file: 45-T8478K-51E-000-0150-50-500F (Ashcroft Inc Dba Heise), 45-T8478K-51E-000-0150-50-550F (Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc).
Key specifications for 45-T8478K-51E-000-0150-50-500F: Flexible Tube Length: 180.000 INCHES NOMINAL IN; Bulb Type: PLAIN RIGID; Scale Inscription/background Color: BLACK MARKING ON YELLOW BACKGROUND; Scale Smallest Increment: 5.0 DEG FAHRENHEIT. 14 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.