BSP (British Standard Taper Pipe) Thread Data


Click Here for Thread Profile Drawing


Angle of thread = 55o degrees

Nominal Size
(inches)		 T P I Pitch
(inches)		 Major Diameter
(inches)		 Minor Diameter
(inches)		 Tapping Drill Size
1/16 28 0.0357 0.304 0.2583 6.4 mm
(0.2520 inch)
1/8 28 0.0357 0.383 0.3372 8.4 mm
(0.3307 inch)
1/4 19 0.0526 0.518 0.4506 11.2 mm
(0.4409 inch)
3/8 19 0.0526 0.656 0.5886 14.75 mm
(0.0507 inch)
1/ 2 14 0.0714 0.825 0.7336 18.25 mm
(0.7185 inch)
3/4 14 0.0714 1.041 0.9496 23.75 mm
(0.9350 inch)
1 inch 11 0.0909 1.309 1.1926 30 mm
(1.1811 inch)

Free JavaScripts provided
by The JavaScript Source
and Dynamic Drive.com