The Thermometer,self-Indicating, cataloged under National Stock Number 6685-00-291-1004, 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 6685-00-291-1004 |
| Primary Part Number | N05A916J-300 |
| Item Name | Thermometer,self-Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Socket Overall Length | 4.375 INCHES NOMINAL4.375 INCHES NOMINAL IN |
| Design Type | FLUCTUATINGFLUCTUATING |
| Separable Socket Style | PLAIN SOCKETPLAIN SOCKET |
| Scale Inscription/background Color | BLACK MARKING ON SILVER BACKGROUNDBLACK MARKING ON SILVER BACKGROUND |
| Scale Smallest Increment | 2.0 DEG FAHRENHEIT2.0 DEG FAHRENHEIT |
| Actuating Medium | MERCURYMERCURY |
| Features Provided | LENS MAGNIFYING FRONT AND LENS MAGNIFYING FRONT AND EXPANSION CHAMBEREXPANSION CHAMBER |
| Scale Type | METAL NONMAGNETICMETAL NONMAGNETIC |
| Bulb Tip Outside Diameter | 0.625 INCHES NOMINAL0.625 INCHES NOMINAL IN |
| External Thread Size | 3/4 IN. NPT3/4 IN. NPT IN |
| Internal Thread Size | 1-1/4 IN. 18NEF21-1/4 IN. 18NEF2 IN |
| Material | BRASS OR IRON MALLEABLE OR STEEL OR ALUMINUM ALLOY METER CASE |
| Scale Adjustment Variation | 2 DIVISION2 DIVISION |
| Tip Length | 2.625 INCHES NOMINAL2.625 INCHES NOMINAL IN |
| 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 |
|---|---|
| N05A916J-300 PRIMARY | Ashcroft Inc Dba Heise (USA) |
| Reference | Meaning |
|---|---|
| N05A916F300B | 5/9 Secondary reference Weksler Glass Thermometer Corp |
| MILT15164 | 4/1 Identification reference U.S. Government activity |
NSN 6685-00-291-1004 is a Thermometer,self-Indicating, manufactured by Ashcroft Inc Dba Heise, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-00-291-1004 has 1 manufacturer part number on file: N05A916J-300 (Ashcroft Inc Dba Heise).
Key specifications for N05A916J-300: Socket Overall Length: 4.375 INCHES NOMINAL4.375 INCHES NOMINAL IN; Design Type: FLUCTUATINGFLUCTUATING; Separable Socket Style: PLAIN SOCKETPLAIN SOCKET; Scale Inscription/background Color: BLACK MARKING ON SILVER BACKGROUNDBLACK MARKING ON SILVER BACKGROUND. 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.