The Gage,vacuum,indicating, cataloged under National Stock Number 6685-00-438-4722, 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 Textron Aviation Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-00-438-4722 |
| Primary Part Number | C668540-0101 |
| Item Name | Gage,vacuum,indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Textron Aviation Inc |
| Status | ACTIVE |
| Scale Range | +2.0 TO 8.0 INCHES OF VACUUM IN |
| 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 |
|---|---|
| C668540-0101 PRIMARY | Textron Aviation Inc (USA) |
| S1414N1 | Textron Aviation Inc (USA) |
| Reference | Meaning |
|---|---|
| C668540-0101 | 3/9 Design control — primary reference Cessna Aircraft Company Dba Textron Aviation |
| S1414N1 | 5/9 Secondary reference Cessna Aircraft Company Dba Textron Aviation |
NSN 6685-00-438-4722 is a Gage,vacuum,indicating, manufactured by Textron Aviation Inc, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-00-438-4722 has 2 manufacturer part numbers on file: C668540-0101 (Textron Aviation Inc), S1414N1 (Textron Aviation Inc).
Key specifications for C668540-0101: Scale Range: +2.0 TO 8.0 INCHES OF VACUUM IN. 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.