What's New

• Updated the user interface to lighten the tap size picker for better text visibility.

App Description

Whether you use Metric taps and drills, US Standard taps and inch drills, or any combination of size types, this app has the answers. No typing required; just tap your thread type and spin the dials to find the correct size of drill for your thread tapping operation.

The interface allows for selection of the following variables to calculate your required drill size:
• Thread Type,
• Tap Size,
• Percentage Depth of Thread,
• Through Hole Clearance,
• Cutting or Forming Operation

The closest drill bits are given in Metric, Fractional Inch, and US No. / Letter sizes, making this the perfect tool for those using a mix of tap and drill types.

The app ensures complete control and accuracy of your operations by recalculating the actual percentage-depth-of-thread and through-hole clearance for each closest drill bit size.

Thread types include:
• US Standard UNC, UNF, UNEF
• ISO Metric coarse, fine
• National Pipe Thread - Tapered (NPT)
• National Pipe Thread - Straight (NPS/NPP)
• British Pipe Standard Thread - BSP (Parallel - G)
• British Pipe Standard Tapered Thread - BSPT (Parallel - R / Rp)

A helpful reference tool for engineers, machinists, trades-men, students, tool makers, DIYers, fitters and turners, and fabricators, etc.

App Screen Shots

(click to enlarge)

App Changes

November 01, 2013 New version 3.3.0
October 15, 2013 New version 3.2.0
September 26, 2013 New version 3.1.0
December 04, 2012 New version 3.0.0
January 05, 2012 Price Decrease: $1.99 -> $0.99
March 14, 2011 Initial Release

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