WHITE RING machine tap, DIN 5156 , HSS-E, G 1/4 x 19 

stainless steel, long chipping up to 1.000 N/mm² -abrasive material - chrome-nickel alloys - for through holes VAP-coating: - improved adhesion of the coolant and Lubricant - reduces tearing of the lubricating filand the formation of cold welding Thread type: Pipe-thread DIN ISO 228 Norm: DIN 5156 Material: HSS-E