The Indicator,temperature-Humidity,e, cataloged under National Stock Number 6685-01-723-3556, 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 Omega Engineering, Inc.. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Indicator,temperature-Humidity,e |
| FSC / FSG | 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments (FSG 66) |
| Manufacturers | Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc (CAGE 27192); Omega Engineering, Inc. (CAGE 29907) |
| Parameter | Value |
|---|---|
| NSN | 6685-01-723-3556 |
| Primary Part Number | HX303AC |
| Item Name | Indicator,temperature-Humidity,e |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Omega Engineering, Inc. |
| Status | ACTIVE |
| 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 |
|---|---|
| MC-040552 | Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc (USA) |
| HX303AC PRIMARY | Omega Engineering, Inc. (USA) |
| Reference | Meaning |
|---|---|
| MC-040020 REV H ITEM 3 | C/1 Advisory reference — outside the item-of-supply concept Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc |
| SMC-037076 | D/9 Drawing number reference only Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc |
NSN 6685-01-723-3556 is a Indicator,temperature-Humidity,e, manufactured by Omega Engineering, Inc., classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-723-3556 has 2 manufacturer part numbers on file: MC-040552 (Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc), HX303AC (Omega Engineering, Inc.).
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.