Tools & Gear Taps & Dies HSS-Co5 Spiral Point (Gun Nose) Taps

B82GE3SP 1/4" x 19 BSPF Spiral Point (GUN) HSS-Co5 Tap - Goliath HSS Bright Finish BSPF Spiral Point Machine Tap. HSS-Co Spiral Point (Gun Nose) Taps. Spiral point taps, also known as "Gun nose taps", have straight flutes supplemented by angular cutting faces at the lead. The design of the cutting portion propels the swarf ahead of the tap leaving the flutes clear for the flow of coolant to the cutting teeth. Primarily designed for use in through holes, these taps can be used in blind holes provided that there is ample clearance beyond the threaded section to accommodate the swarf. The advantages of a gun nose tap are the shearing action of the angular cutting faces, which produces a fine finish on the threads and shallower flutes. This allows a stronger cross section throughout the tap. British Standard Pipe - G Series (BSPF) is a pipe thread which is used mainly for mechanical coupling. The angle of thread is mainly 55° however for the US method some threads have a 60° angle. It is specified according to JIS and ISO R228. Manufactured from HSS-Co5, this modern design tap uses straight flutes supplemented by angular cutting faces at the point to produce a fine finish on the threads. Shallower flutes achieve a stronger cross section allowing the tap to withstand greater cutting forces.