Tommy Bar Hole Nut

tommy bar hole referring to the Hex nuts with 1 hole drilled in each face of the hex flats,or the purpose of hand tightening the nut through the window of a hydraulic bolt tensioning.ASTM A194 Grade 2H. Grade 7,Grade 7M,PTFE, Fluorocarbon.Xylan 1070,Xylan 1424,xylan 1425  Coated