The Manometer,u-Tube, cataloged under National Stock Number 6685-00-857-4895, 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 17 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 6685-00-857-4895 |
| Item Name | Manometer,u-Tube |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | CANCELLED |
| Zero Adjuster | PROVIDED |
| Indicator Type | TWO LIQUID |
| Equalizing Valve | NOT PROVIDED |
| Indicating Liquid for Which Designed | DISTILLED WATER AND MERCURY |
| Scale Smallest Increment | 0.2 INCHES IN |
| Receptacle Type | EXPANSION CHAMBER |
| Indicating Liquid | NOT PROVIDED |
| Connection Type | ELASTIC TUBING |
| Scale Range | -30.0 TO 30.0 INCHES IN |
| Operating Pressure | 50.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Accessory Components and Quantity | PLASTIC CARRYING CASE; MAGNETIC MOUNTING CLIPS; TWO RAPID SHUT-OFF TYPE MOLDED NYLON RUBBER TUBING CONNECTORS; BOTTLE FLORESCENT GREEN COL0R CONCENTRATE 1 |
| Tubing Outside Diameter | 0.219 INCHES NOMINAL IN |
| Connection Facility Type | EXTERNAL |
| Connection Location | TOP RIGHT SIDE AND TOP LEFT SIDE |
| Parallax Eliminating Feature | PROVIDED |
| Control Valve | PROVIDED |
| Mounting Provision for Which Designed | SURFACE PANEL |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| FLEX-1211-48 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 6685008574895 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| J21478-1 | 5/9 Secondary reference Bosch Automotive Service Solutions Inc. |
| 1211-60 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6685-00-857-4895 is a Manometer,u-Tube, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: cancelled.
1 possible match (shared part number, not a government interchangeability claim): 4730-01-481-5157. Verify interchangeability with system specifications before substitution.
Key specifications for 6685-00-857-4895: Zero Adjuster: PROVIDED; Indicator Type: TWO LIQUID; Equalizing Valve: NOT PROVIDED; Indicating Liquid for Which Designed: DISTILLED WATER AND MERCURY. 17 specifications are documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 6685-00-857-4895 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.