The Gage,differential,dial Indicatin, cataloged under National Stock Number 6685-01-221-4601, 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 5 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 6685-01-221-4601 |
| Item Name | Gage,differential,dial Indicatin |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| Overall Diameter | 7.500 INCHES NOMINAL IN |
| Actuation Type | BELLOWS |
| Criticality Code Justification | ZZZY |
| Material | COPPER ALLOY ACTUATING ELEMENT |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| 2417705-1 | 5/1 Secondary reference Cosmodyne, Llc Dba Cosmodyne Llc |
| 2417705-1CP | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2417705-1CP | 3/1 Design control — primary reference Cosmodyne, Llc Dba Cosmodyne Llc |
NSN 6685-01-221-4601 is a Gage,differential,dial Indicatin, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
Key specifications for 6685-01-221-4601: Overall Diameter: 7.500 INCHES NOMINAL IN; Actuation Type: BELLOWS; Criticality Code Justification: ZZZY; Overall Width: 4.188 INCHES NOMINAL IN. 5 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.