The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-581-1653, is classified within Federal Supply Class 6680 (Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 6 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 | 6680-01-581-1653 |
| Primary Part Number | 3703K3 |
| Item Name | Indicator,sight,liquid |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Nominal Pipe Size for Which Designed | UNABLE TO DECODE |
| Maximum Temp Rating | 425.0 FAHRENHEIT DEGF |
| Media for Which Designed | HYDRAULIC FLUID AND STEAM AND WATER |
| Maximum Working Pressure | 410.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Material | STEEL COMP 316 |
| Guard Rod Quantity | 2 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3703K3 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 6680-01-581-1653 is a Indicator,sight,liquid, manufactured by Mcmaster-Carr Supply Co, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-581-1653 has 1 manufacturer part number on file: 3703K3 (Mcmaster-Carr Supply Co).
Key specifications for 3703K3: Nominal Pipe Size for Which Designed: UNABLE TO DECODE; Maximum Temp Rating: 425.0 FAHRENHEIT DEGF; Special Features: 2 GUARD RODS, 14 INC BETWEEN 1/2 INCH PIPE MOUNT , 15.750 INCH OVER ALL HGT, 10.250 SIGHT GLASS HGT, 3.937 OVERALL WIDTH, 310 MAX PSI FOR STEAM IN; Media for Which Designed: HYDRAULIC FLUID AND STEAM AND WATER. 6 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.