... .)Tensile(Lbs.)Inchesmm3/16" 5 0.9 1,200 1/4 " 6 1.6 2,200 5/16" 8 2.5 3,400 3/8 ... .3 8,500 9/16" 14 8.0 10,800 5/8 " 16 10.0 3/4 " 18 14.3 ... 19,400 13/16" 18 16.5 24,400 7/8 " 22 19.4 26,300 <d ... ,000 1- 1/4 " 30 40.0 52,000 1- 5/16" 32 45.0 58,000 1- 1/2 " 36 ... 58.0 74,000 1- 5/8 " 40 71.0 90,000 1- 3/4 " 42 ... ,000 2- 1/2 " 60 159.0 189,000 2- 5/8 " 64 181.0 213,000 2- 3/4 " 66 ...