This YG-1 TOOL CO brand 3 Flute Spiral Pointed Plug Stem Oxide Tap For Steels Upto 38Hrc has a number of flutes of 3, a weight of 0.0536, a material of HSSE-V3, a finish of oxide, a size of 5/16 – 18, H5, a useable length of 28.6mm, a connection of 8.08 x 6.05mm, a drill size of 0.261983333in, a neck diameter of 0.234in, a thread series of UNC, a diameter of 7.9375mm, a square size of 0.238in, a shank type of square, a thread length of 16.99mm, a square size of 8.08mm, a neck diameter of 5.94mm, a package of 0.5H, a chamfer type of plug, a drill size of 6.654376667mm, a size and pitch of 43236, a trade name of YG Tap Steel, a length/diameter of 3.0xD, a shank diameter of 8.08mm, a thread length of 0.669in, a useable length of 1.126in, a pitch limit of H5, a diameter of 0.3125in, a square length of 0.38in, a snap pack count of 10, a chamfer length of 4P-5P, a shank diameter of 0.318in, a package of 0.625W, a square length of 9.65mm, a system of measurement of inch, a pitch of 18, an OAL of 69.09mm, an OAL of 2.72in, a connection of 0.318 x 0.238in, a package of 3.75L, and a tap type of SPPT.