The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-540-7220, 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 10 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 | 6680-01-540-7220 |
| Primary Part Number | 3713K4 |
| 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 |
| Furnished Data | LIQUID LEVEL |
| Nominal Pipe Size for Which Designed | UNABLE TO DECODE |
| Data Furnishing Method | CLEAR WINDOW |
| End Connection Type | UNABLE TO DECODE |
| Style Designator | GAGE VALVE |
| Maximum Working Pressure | 335.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Material | COPPER ALLOY |
| Guard Rod Quantity | 4 |
| Thread Series Designator | UNABLE TO DECODE |
| Sight Diameter | 0.750 INCHES NOMINAL IN |
| 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 |
|---|---|
| 3713K4 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 6680-01-540-7220 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 6680-01-540-7220 has 1 manufacturer part number on file: 3713K4 (Mcmaster-Carr Supply Co).
Key specifications for 3713K4: Furnished Data: LIQUID LEVEL; Nominal Pipe Size for Which Designed: UNABLE TO DECODE; Data Furnishing Method: CLEAR WINDOW; End Connection Type: UNABLE TO DECODE. 10 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.