The Indicator,differential, cataloged under National Stock Number 6685-01-191-4964, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-191-4964 |
| Item Name | Indicator,differential |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| General Characteristics Item Description | BODY,ALUMINUM ALLOY,QQ-A-325,ALLOY 6061,T651 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 7657-11 | 3/9 Design control — primary reference Air Dry Co of America, Llc |
| 7657-11 | 3/2 Design control — primary reference U.S. Government activity |
| 7657-1 | C/1 Advisory reference — outside the item-of-supply concept Honeywell International Inc Dba Honeywell Div Consumer Products Group |
NSN 6685-01-191-4964 is a Indicator,differential, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
Key specifications for 6685-01-191-4964: General Characteristics Item Description: BODY,ALUMINUM ALLOY,QQ-A-325,ALLOY 6061,T651; End Item Identification: LOW PRESSURE /LP/ DRY AIR-DEHYDRATOR; TRIDENT MATERIAL. 1 specification is 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.