The Pyrometer,indicating, cataloged under National Stock Number 6685-00-844-9252, 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 Alnor Instrument Company. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-00-844-9252 |
| Primary Part Number | FAX660 |
| Item Name | Pyrometer,indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Alnor Instrument Company |
| Status | ACTIVE |
| Overall Diameter | 5.500 INCHES NOMINAL IN |
| Scale Calibration | CALIBRATED TO IRON CONSTANTAN THERMOCOUPLE |
| Scale Smallest Increment | 10.0 DEG FAHRENHEIT |
| Scale Accuracy Rating | 10 DEG F ACCURACY RATING DEGF |
| Measurement Type | POTENTIOMETER CIRCUIT |
| Unthreaded Mounting Hole Diameter | 0.172 INCHES NOMINAL IN |
| Pointer/pen Type and Quantity | 8 INDICATING MULTIPLE |
| Scale Type | HORIZONTAL |
| Case Type | DUST TIGHT AND FUMEPROOF AND SPLASH PROOF |
| Mounting Bolt Circle Diameter | 5.000 INCHES NOMINAL IN |
| Scale Measurement Range | +0.000 TO 1600.000 DEG FAHRENHEIT |
| Scale Length | 3.000 INCHES NOMINAL IN |
| Material | BRASS 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 |
|---|---|
| FAX660 PRIMARY | Alnor Instrument Company (USA) |
| Reference | Meaning |
|---|---|
| 603-332-000 | C/1 Advisory reference — outside the item-of-supply concept Alnor Instrument Company |
NSN 6685-00-844-9252 is a Pyrometer,indicating, manufactured by Alnor Instrument Company, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-00-844-9252 has 1 manufacturer part number on file: FAX660 (Alnor Instrument Company).
Key specifications for FAX660: Overall Diameter: 5.500 INCHES NOMINAL IN; Scale Calibration: CALIBRATED TO IRON CONSTANTAN THERMOCOUPLE; Scale Smallest Increment: 10.0 DEG FAHRENHEIT; Scale Accuracy Rating: 10 DEG F ACCURACY RATING DEGF. 13 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.