Overview Reviews Product Description Premium HSS hand tap Ground thread Bright finish BA (British Association) is a metric thread system devised by the British for small screws used in components with a thread form of 47 ½° Available in taper (7 - 10 thread chamfer), plug (3 - 5 thread chamfer), and bottoming chamfer (1 - 2 thread chamfer) The set part number includes one each of taper, plug, and bottoming chamfers Designed for hand tapping in wide variety of materials in both through hole and blind hole applications Clarkson Osborn Catalog Product Videos Custom Field Size #12 - 0.28 BA Flute length 7mm Overall length 40mm Package quantity/sold as each 1 Product Reviews Write a Review Write a Review × Clarkson-Osborn #12 - 0.28 BA HSS Warwick® Taper Hand Tap TA38122 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *