09-04-2015, 07:05 PM
Be careful with BSPF, BSPP and BSPT. BSP is a pipe thread form and therefore the size can be misleading. It used to denote the pipe bore, but it doesn't really work nowadays. Taper tapping size is smaller than BSPF or BSPP tapping size.
3/8 BSPT tapping would be a bore of 9.525mm, but tapping drill for that size is 37/64 aka 14.75mm.
http://www.tradezone.co.nz/tapanddie/dri...pt-tap.htm
3/8 BSPT tapping would be a bore of 9.525mm, but tapping drill for that size is 37/64 aka 14.75mm.
http://www.tradezone.co.nz/tapanddie/dri...pt-tap.htm
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