1" Bspt Hss Tap BS3102 They are rated in flow

They are rated in flow capacity ”cubic centimeters per minute” and are changeable for tuning purposes

Pop Rivet Aluminium Steel Truss Head 73AS6-10 4

Sets : Mango Basic II E

Intake Gasket set Holden

Weldon or Combimaster Shanks

1" Bspt Hss Tap BS3102 They are rated in flowTaper thread, British Standard Pipe Taper thread (BSPT), whose diameter increases or decreases along the length of the thread. For producing precision threads by hand tapping, for starting threads either second or bottoming taps should used after to achieve desire thread depth. Taper pipe reamer recommended prior to tapping Rc (BSPT) thread forms General purpose use Threads per inch 11 Overall length 109mm Cutting length 33mm Drill diameter 30mm Brand