British Standard Pipe Threads Tap Drill Chart
BSP (British Standard Pipe) is a widely accepted set of screw threads used for connecting and sealing pipes and fittings. The thread form on BSP threads follows the British Standard Whitworth standard. BSP has become the standard in plumbing and pipe fitting worldwide, except in North America where NPT (National Pipe Thread) and similar threads are more common.
BSPP – British Standard Pipe Parallel (Straight)
BSPT – British Standard Pipe Tapered
BSPP & BSPT Tap Drill Chart
|Pipe Tap Size||BSPP||BSPT|
|Pitch (TPI)||Drill Size (inch)||Pitch (TPI)||Drill Size (inch)|
The values displayed in this table are for direct tapping without reaming.