OSG Threading Tap - BSPT Spiral Point HSS-E - Steam Oxide Coated - Through Hole - 1/2 x 14Engineered for precision BSPT threading, the OSG BSPT Spiral Point Threading Tap in 1 2 x 14 through hole design delivers reliable, high quality BSPT threads for demanding metalworking tasks. Size and thread form: 1 2 x 14 BSPT through hole threading for accurate, repeatable taps Material: HSSE (high speed steel with cobalt) for superior wear resistance and heat tolerance Coating: Steam Oxide coating reduces friction and enhances tool life in tough