The Thermometer,self-Indicating,bime, cataloged under National Stock Number 6685-01-210-5535, 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 7 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6685-01-210-5535 |
| Primary Part Number | 5A06-25-FNX |
| Item Name | Thermometer,self-Indicating,bime |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Stem Length | 6.000 INCHES NOMINAL IN |
| Design Type | FLUCTUATING |
| Dial Diameter | 5.000 INCHES NOMINAL IN |
| Style Designator | STRAIGHT FORM, HORIZONTAL DIAL |
| Scale Type | DIAL |
| Scale Measurement Range | +25.000 TO 125.000 DEG FAHRENHEIT |
| Material | STEEL 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 |
|---|---|
| 5A06-25-FNX PRIMARY | Ashcroft Inc Dba Heise (USA) |
| 937-7928 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| Reference | Meaning |
|---|---|
| 5A06 | C/1 Advisory reference — outside the item-of-supply concept Weksler Glass Thermometer Corp |
| 937-7928 | 5/9 Secondary reference Aqua-Chem, Inc. |
| 5A06-25-125F | 5/9 Secondary reference Weksler Glass Thermometer Corp |
| 5A06-25-125F | 5/9 Secondary reference Ashcroft Inc Dba Heise |
NSN 6685-01-210-5535 is a Thermometer,self-Indicating,bime, manufactured by Ashcroft Inc Dba Heise, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-210-5535 has 2 manufacturer part numbers on file: 5A06-25-FNX (Ashcroft Inc Dba Heise), 937-7928 (Aqua-Chem, Inc. Dba Aqua-Chem Inc).
1 possible match (shared part number, not a government interchangeability claim): 6650-01-251-0584. Verify interchangeability with system specifications before substitution.
Key specifications for 5A06-25-FNX: Stem Length: 6.000 INCHES NOMINAL IN; Design Type: FLUCTUATING; Dial Diameter: 5.000 INCHES NOMINAL IN; Style Designator: STRAIGHT FORM, HORIZONTAL DIAL. 7 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.