Tensile strength exceeds 1,100 lbs. per bolt;Acme thread design provides increased strength and smoother, faster threading;100% corrosion proof nylon bolts are available in convenient 2-3/8" and 3-3/8" lengths;Improved adaptability - open end nut now fits 1/2" sockets and fits under most bolt caps. Bolt base loads into any flange;Unique design allows for quick and hassle free installation;Pyramid base design keeps bolt upright and does not allow bolt to spin in flange, eliminating need to double nut bolt