The Gage,compound Pressure-Vacuum,di, cataloged under National Stock Number 6685-01-391-5992, 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. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-391-5992 |
| Primary Part Number | AA442MS4LWXSH |
| Item Name | Gage,compound Pressure-Vacuum,di |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Ashcroft Inc Dba Heise |
| 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 |
|---|---|
| AA442MS4LWXSH | Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc (USA) |
| AA442MS4LWXSH PRIMARY | Ashcroft Inc Dba Heise (USA) |
| Reference | Meaning |
|---|---|
| AA14-2MS4-LWF9SH | 5/9 Secondary reference Ashcroft Inc Dba Heise |
| AA14-2MS4-LWF911 | 5/9 Secondary reference Weksler Glass Thermometer Corp |
| 508-8387 IT NO 4 | 5/9 Secondary reference Aqua-Chem, Inc. |
| 850-08225-000 | 5/9 Secondary reference Aqua-Chem, Inc. |
NSN 6685-01-391-5992 is a Gage,compound Pressure-Vacuum,di, manufactured by Ashcroft Inc Dba Heise, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-391-5992 has 2 manufacturer part numbers on file: AA442MS4LWXSH (Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc), AA442MS4LWXSH (Ashcroft Inc Dba Heise).
Key specifications for AA442MS4LWXSH: Special Features: NOT FOR SHIPBOARD USE; End Item Identification: USNS HENRY J.KAISER CLASS TAO. 0 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.