The Thermometer,indicating,capillary, cataloged under National Stock Number 6685-01-497-8732, 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 11 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6685-01-497-8732 |
| Primary Part Number | 31GP-Y00U-Y15Y |
| Item Name | Thermometer,indicating,capillary |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Bulb Overall Length | 5.500 INCHES NOMINAL IN |
| Bulb Type | PLAIN RIGID |
| Active Portion Diameter | 0.750 INCHES NOMINAL IN |
| Actuating Medium | GAS |
| Pointer/pen Type and Quantity | 2 INDICATING SINGLE |
| Active Portion Length | 3.000 INCHES NOMINAL IN |
| Extension Neck Length | 2.500 INCHES NOMINAL IN |
| Scale Type | BROAD ARC DIAL AND CIRCULAR AND PLASTIC |
| Bulb Quantity | 1 |
| Bulb Style | PLAIN BULB |
| Material | ALUMINUM METER 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 |
|---|---|
| 31GP-Y00U-Y15Y PRIMARY | Ashcroft Inc Dba Heise (USA) |
| Reference | Meaning |
|---|---|
| 31GO-Y00U-Y15Y | 5/1 Secondary reference Ashcroft Inc Dba Heise |
| 31GO-Y00L-Y15Y | 5/1 Secondary reference Ashcroft Inc Dba Heise |
| M19646-B255D315 | 5/9 Secondary reference U.S. Government activity |
| 31GO-Y00U-Y15Y | 5/1 Secondary reference Weksler Glass Thermometer Corp |
| M27-927 | D/9 Drawing number reference only Ashcroft Inc Dba Heise |
| MIL-T-19646 | 5/9 Secondary reference U.S. Government activity |
| 31GO-Y00L-Y15Y | 5/1 Secondary reference Weksler Glass Thermometer Corp |
NSN 6685-01-497-8732 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 6685-01-497-8732 has 1 manufacturer part number on file: 31GP-Y00U-Y15Y (Ashcroft Inc Dba Heise).
1 possible match (shared part number, not a government interchangeability claim): 6685-01-507-1887. Verify interchangeability with system specifications before substitution.
Key specifications for 31GP-Y00U-Y15Y: Bulb Overall Length: 5.500 INCHES NOMINAL IN; Bulb Type: PLAIN RIGID; Active Portion Diameter: 0.750 INCHES NOMINAL IN; Actuating Medium: GAS. 11 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.