The Manometer,u-Tube, cataloged under National Stock Number 6685-00-608-0318, 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 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-00-608-0318 |
| Item Name | Manometer,u-Tube |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| Zero Adjuster | PROVIDED |
| Indicator Type | TWO LIQUID |
| Equalizing Valve | NOT PROVIDED |
| Indicating Liquid for Which Designed | WATER AND MERCURY |
| Scale Smallest Increment | 0.1 INCHES IN |
| Indicating Liquid | NOT PROVIDED |
| Connection Type | ELASTIC TUBING |
| Scale Range | +0.0 TO 120.0 INCHES IN |
| Operating Pressure | 50.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Tubing Outside Diameter | 0.188 INCHES NOMINAL IN |
| Connection Facility Type | EXTERNAL |
| Connection Location | RIGHT AND UPPER LEFT SIDE |
| Parallax Eliminating Feature | PROVIDED |
| Control Valve | PROVIDED |
| Mounting Provision for Which Designed | SURFACE PANEL |
| Mounting Type | BASE |
| 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 |
|---|---|
| 1211-120 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6685-00-608-0318 is a Manometer,u-Tube, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
Key specifications for 6685-00-608-0318: Zero Adjuster: PROVIDED; Indicator Type: TWO LIQUID; Equalizing Valve: NOT PROVIDED; Indicating Liquid for Which Designed: WATER AND MERCURY. 16 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.