The Thermometer,indicating,capillary, cataloged under National Stock Number 6685-01-512-5174, 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 21 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-512-5174 |
| Item Name | Thermometer,indicating,capillary |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| Flexible Tube Length | 180.000 INCHES NOMINAL IN |
| Bulb Overall Length | 19.687 INCHES NOMINAL IN |
| Bulb Type | FLEXIBLE EXTENSION PLAIN |
| Active Portion Diameter | 0.375 INCHES NOMINAL IN |
| Bulb Connection Type | UNION |
| Dial Diameter | 3.500 INCHES NOMINAL IN |
| Indicator Connection Method | FLEXIBLE TUBE |
| Style Designator | BULB W/SOCKET |
| Material Document and Classification | MIL-T-19646A MIL SPEC ALL MATERIAL RESPONSES OVERALL A |
| Case Diameter | 4.750 INCHES NOMINAL IN |
| Actuating Medium | GAS |
| Pointer/pen Type and Quantity | 1 INDICATING SINGLE |
| Active Portion Length | 3.000 INCHES NOMINAL IN |
| Extension Neck Length | 16.000 INCHES NOMINAL IN |
| Scale Type | CONCENTRIC DIAL |
| Scale Measurement Range | +20.000 TO 240.000 DEG FAHRENHEIT |
| Bulb Quantity | 1 |
| Bulb Tip Length | 3.000 INCHES NOMINAL IN |
| Bulb Style | PLAIN BULB W/BENDABLE EXTENSION |
| Material | ALUMINUM METER CASE |
| 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 |
| Reference | Meaning |
|---|---|
| 31GP-Y00F-F15Y | 5/1 Secondary reference Ashcroft Inc Dba Heise |
| M19646-C224D315 | 2/2 Government specification standardization U.S. Government activity |
| MIL-T-19646A | 4/1 Identification reference U.S. Government activity |
NSN 6685-01-512-5174 is a Thermometer,indicating,capillary, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 6685-01-527-1448, 6685-01-527-1479, 6685-01-539-3090. Verify interchangeability with system specifications before substitution.
Key specifications for 6685-01-512-5174: Flexible Tube Length: 180.000 INCHES NOMINAL IN; Bulb Overall Length: 19.687 INCHES NOMINAL IN; Bulb Type: FLEXIBLE EXTENSION PLAIN; Active Portion Diameter: 0.375 INCHES NOMINAL IN. 21 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.