E2871/4 UNC Machine Forming Tap, Oil Grooves

Thread forming tap with lube grooves with chamfer form C with a 2-3xP plug lead, for Unified National Coarse thread UNC 1/4" with 20 TPI and 2BX class of fit, dimensions according to DIN 2184-1 standard with 7.0mm shank and 5.5mm square drive, cobalt based HSS-E with TiN coating for 3.5xD through or blind hole threading in steel and cast steel, stainless steel and wrought or cast aluminium