The Thermometer,indicating,capillary, cataloged under National Stock Number 6685-00-159-0724, 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 28 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 6685-00-159-0724 |
| Primary Part Number | 41GN-P00U-W65Y |
| 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 | 780.000 INCHES NOMINAL IN |
| Mounting Facility Type and Quantity | 1 SURFACE AND 3 HOLE |
| Bulb Overall Length | 10.000 INCHES NOMINAL IN |
| Bulb Type | PLAIN RIGID |
| Active Portion Diameter | 0.975 INCHES NOMINAL IN |
| Scale Inscription/background Color | BLACK MARKING ON YELLOW BACKGROUND |
| Scale Smallest Increment | 10.0 DEG FAHRENHEIT |
| Scale Accuracy Rating | PLUS ORMINUS 10 DEG |
| Bulb Connection Type | INTEGRAL FLANGE |
| Dial Diameter | 4.500 INCHES NOMINAL IN |
| Indicator Connection Method | FLEXIBLE TUBE |
| Unthreaded Mounting Hole Diameter | 0.219 INCHES NOMINAL IN |
| Style Designator | BULB W/O SOCKET |
| Material Document and Classification | AISI ASSN STD SINGLE MATERIAL RESPONSE BULB |
| Case Diameter | 5.875 INCHES NOMINAL IN |
| Actuating Medium | GAS |
| Pointer/pen Type and Quantity | 1 INDICATING SINGLE AND 1 REFERENCE SINGLE |
| Active Portion Length | 3.500 INCHES MAXIMUM IN |
| Extension Neck Length | 6.500 INCHES NOMINAL IN |
| Features Provided | ZERO ADJUSTMENT |
| Scale Type | DIAL |
| Case Type | SHOCK RESISTANT |
| Mounting Bolt Circle Diameter | 5.375 INCHES NOMINAL IN |
| Scale Measurement Range | +400.000 TO 1200.000 DEG FAHRENHEIT |
| Bulb Quantity | 1 |
| Bulb Tip Length | 3.500 INCHES NOMINAL IN |
| Bulb Style | PLAIN BULB W/RIGID EXTENSION |
| Material | ALUMINUM ALLOY BEZEL |
| 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 |
|---|---|
| 41GN-P00U-W65Y PRIMARY | Ashcroft Inc Dba Heise (USA) |
| 41GNP00UW65Y | Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc (USA) |
| Reference | Meaning |
|---|---|
| MILT19646 | 4/1 Identification reference U.S. Government activity |
| 45T8478K-41E-010-0650-400-1200F | 5/1 Secondary reference Ashcroft Inc Dba Heise |
NSN 6685-00-159-0724 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 6685-00-159-0724 has 2 manufacturer part numbers on file: 41GN-P00U-W65Y (Ashcroft Inc Dba Heise), 41GNP00UW65Y (Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc).
Key specifications for 41GN-P00U-W65Y: Flexible Tube Length: 780.000 INCHES NOMINAL IN; Mounting Facility Type and Quantity: 1 SURFACE AND 3 HOLE; Bulb Overall Length: 10.000 INCHES NOMINAL IN; Bulb Type: PLAIN RIGID. 28 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.