DORMER HSS TAP 7/8NO9 E1197/8NO9

Bright provides a smooth, polished finish on the tool. It increases chip flow in softer materials such as aluminum, wood and plastic
BSPP refers to British Internal Straight Parallel Pipe Thread. They are commonly used for mechanical joints

Machining steel soft steel (<120 HB <400 N/mm²)
Construction steel carburised steel (<200 HB <700 N/mm²)
Carbon steel (<250 HB <850 N/mm²)
Alloyed steel (<250 HB <850 N/mm²)
Alloy steel hardened and tempered steel (>250<350 HB >850<1200 N/mm²)
Cast Iron lamellar (<150 HB >500 N/mm ²)
Cast iron lamellar (> 150<300 HB >500<1000 N/mm²)
Ductile cast iron/malleable cast iron (<200 HB <700 N/mm²)
Ductile cast iron/malleable cast iron (>200<300 HB >700<1000 N/mm²)
Copper (<100 HB <350 N/mm²)
Béta-Brass Bronze (<200 HB <700 N/mm²)
Alfa-Brass (<200 HB <700 N/mm²)
Extra-strong bronze (<470 HB <1500 N/mm²)
Aluminium alloyed Silicon 0.5% (<150 HB <500 N/mm²)
Aluminium alloyed Silicon > 0.5% < 10% (<120 HB <400 N/mm²)
Aluminium alloyed Silicon >10% whisker reinforced Aluminium-alloys Magnesium-alloys (<120 HB <400 N/mm²)
Duraplastics
Reinforced plastic materials