Machine tap with spiral point suited for through holes only. Steam tempered surface acts to retain cutting fluid and prevent chip to tool welding. Specifications Shank: Cylindrical shank with Square Connection diameter - millimeter (DCON MS): 8mm Threading length - millimeter (THL): 16mm Thread diameter - millimeter (TD): 7.938mm Basic standard group (BSG): ISO 529 Material code (BMC): High Speed Steel Thread diameter size (TDZ): 5/16 Thread form (THFT): BSW - British standard Whitworth Flute count (NOF): 3 Hand (Cutting direction): Right Material Application Priority Usage: M - Stainless steel, P - Steel and cast steel Alt Part Number (Material ID): 5976552 Hole Type: Through Hole Coating: Steam Tempered Package Quantity: 1 Country of origin: India Sellable Unit Weight: 27 Brand: Dormer Package Dimensions: 16.5 x 88.65 x 13.48mm