... resisiting, lower down the requirement of washer tackifier. Characters of Triangle-thread:1. To reduce the additonal cost and the related ... cost of tapping process.2. The design of triangle teeth can serve for loose-resisiting, lower down the ... TRUSS, HEX etc.Common dirver type (DRIVER):PHILLIPS, POZIDRIV, SLOTTED, TRIANGLE, SQUARE, HEX, SIX-LOBE, TRI-WING etc.Threading size range ...