The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-646-9737, 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 Ritchie Engineering Co Inc. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-646-9737 |
| Primary Part Number | 49138 |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Ritchie Engineering Co Inc |
| Status | ACTIVE |
| Power Source | INTERNAL |
| Connection Location | BOTTOM |
| Material | COPPER ALLOY CASE |
| Connection Quantity | 1 |
| Connection Size | 1/8 NPT MALE CONNECTION |
| 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 |
|---|---|
| 49138 PRIMARY | Ritchie Engineering Co Inc (USA) |
NSN 6685-01-646-9737 is a Gage,pressure,dial Indicating, manufactured by Ritchie Engineering Co Inc, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-646-9737 has 1 manufacturer part number on file: 49138 (Ritchie Engineering Co Inc).
Key specifications for 49138: Power Source: INTERNAL; Connection Location: BOTTOM; Special Features: CALIBRATED TO 1 PERCENT ACCURACY;COLOR-CODED RED FOR PRESSURE AND BLUE FOR COMPOUND;COLOR-CODED REFRIGERANT TYPES; Part Name Assigned by Controlling Agency: BLUE COMPOUND GAUGE. 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.