standard tap thread size uk In the UK the most common standard tap thread for outdoor taps is 3 4 BSP but some older taps may be 1 2 BSP Hozelock s 2175 Tap Connector comes with a 3 4 BSP thread and a 1 2 BSP adaptor to make sure it is compatible with most common taps
Refer to this table to determine the tap drill sizes for British Standard Pipe Threads both BSP tapered BSP straight British Standard Pipe Thread BSP and Tapered Pipe Thread BSP Tr Rc Page 8 American National Taper Pipe NPT Page 9 Recommended Tapping and Clearance Drill Sizes
standard tap thread size uk
standard tap thread size uk
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BSP is a British standard for pipe threads defined by ISO 7 ISO 228 It is the most commonly used pipe thread system outside the USA In North America the more popular standard is NPT Although it is a British standard and the nominal pipe sizes are in Inches the dimensions are defined in millimeters The most standard tap thread for domestic garden taps in the UK is 3 4 BSP British Standard Pipe This measures 26 44mm across the outside diameter roughly 1 The picture shows the measurement for a standard 3 4 tap thread If your tap looks like this you have a standard 3 4 BSP tap
In the modern standard metric version it is simply a size number where listed diameter size is the major outer diameter of the external thread For a taper thread it is the diameter at the gauge length plus minus one thread pitch from the small end of the thread Rc Series British Standard Pipe Taper BSPT Also referred to as British Standard Taper Pipe or Pipe Taper or Conical Thread Taper is 3 4 taper per foot 1 in 16 on the diameter Various Symbols BSPT BSPTr PT KR Rc link to tap and die index page
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British Standard Pipe Thread BSP sizes dimensions including a BSP to mm conversion chart BSPT Threads British Standard Pipe Taper Thread Designation BSPT Nominal Size BSPT Thread Form Type Major Diameter mm d D Pitch mm p Threads per inch tpi Pitch Diameter mm d2 D2 Minor Diameter Male Thd d3 D3 Thread Height H1 Rounding r Effective Thread Length mm External Tap Drill Diameter mm R 1 16 1 16 BSPT 7 723 0 907 28 7 142 6
The tap size chart provides a list of standard size taps specifying the diameter and thread spacing for fractional metric and screw sizes The decimal equivalents of the diameters are shown in both English and Metric units Many plumbing thread sizes are British Standard Pipe BSP which comes in two flavours 1a BSP Tapered BSPT where the thread is tapered generally only male threads as its more difficult to taper cut internal threads
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standard tap thread size uk - In the modern standard metric version it is simply a size number where listed diameter size is the major outer diameter of the external thread For a taper thread it is the diameter at the gauge length plus minus one thread pitch from the small end of the thread