... down the requirement of washer tackifier. Characters of Triangle-thread:1. To reduce the additonal cost and ... of tapping process.2. The design of triangle teeth can serve for loose-resisiting, lower ... same thread like B type, suitable for thin plates and plastic parts.4. P-type, it can ... etc.Common dirver type (DRIVER):PHILLIPS, POZIDRIV, SLOTTED, TRIANGLE, SQUARE, HEX, SIX-LOBE, TRI-WING etc.Threading ...