The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-643-8417, 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 Perma-Cal Industries, Inc. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments (FSG 66) |
| Manufacturers | Gulf Coast Holdings, Inc Dba Unidynamics (CAGE 0DHG4); Perma-Cal Industries, Inc (CAGE 59018) |
| Parameter | Value |
|---|---|
| NSN | 6685-01-643-8417 |
| Primary Part Number | 121R1B01F25-Z |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Perma-Cal Industries, 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 |
|---|---|
| 15666024-2 | Gulf Coast Holdings, Inc Dba Unidynamics (USA) |
| 121R1B01F25-Z PRIMARY | Perma-Cal Industries, Inc (USA) |
| Reference | Meaning |
|---|---|
| 15663000 ITEM 35 | C/1 Advisory reference — outside the item-of-supply concept Gulf Coast Holdings, Inc Dba Unidynamics |
NSN 6685-01-643-8417 is a Gage,pressure,dial Indicating, manufactured by Perma-Cal Industries, Inc, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-643-8417 has 2 manufacturer part numbers on file: 15666024-2 (Gulf Coast Holdings, Inc Dba Unidynamics), 121R1B01F25-Z (Perma-Cal Industries, 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.