Additional Drilling Equipment - 2371UD7B.19 New Taylor Valve (Vaetrix) 1/8" NPT Brass Probalyzer Mini-Gauge Plugs, Pressure Rated for VAC to 2200 PSI, with Viton Seals, Part Number 16-531661; Plus Caps, Part Number 16-013560. Each bid quantity is for a Lot of Three (3) Plugs and Three (3) Caps. You may bid / buy any number of lots, up to the total quantity available above. This item was received in a load of salvage freight recently, and they are brand new in the original factory bags. Best we can determine, these are used to take samples and pressure readings in high pressure fluid systems. Tends to work better than drilling a hole with an electric drill and trying to catch the fluid in a cup. According to the calipers Overall length (including cap): 1.752" Length (excluding cap): 1.311" Hex size: .437" (7/16") Threads: 1/8" NPT According to the manufacturer: Taylor Vaetrix Gauge Plug and Gauge Probe Fittings have been a standard in the oil field since their invention in 1958 by Julian Taylor. Typical applications include well heads, flow lines, pressure vessels and anywhere accurate pressures are required. APPLICATIONS -- Troubleshoot complicated hydraulic or pneumatic circuits during operation without breaking pressure in lines. -- Sample line fluids in seconds. -- Calibrate or test the accuracy of fixed pressure gauges or meters. ADVANTAGES OF THE GAUGE PLUG & PROBE SYSTEM -- Seal is bubble tight. -- Metal to metal seat plus elastomer seal. -- Take pressure readings in seconds. -- The probe does not need lubricant prior to probing. -- Reduced chance of gauge loss due to theft or vandalism. -- Eliminates excessive wear on expensive, delicate gauges due to harsh environments,vibration, pressure pulsation or mechanical shock. Location: Springfield, Tennessee. For complete listing information please select the Click To Bid button to see this item on eBay.