Page 32 of Rigging by Vanguard Steel

chains nacm chain specifications grade 30 proof coil chain chain size inch 1/8 3/16 1/4 5/16 3/8 7/16 1/2 5/8 3/4 7/8 1 mm 4.0 5.5 7.0 8.0 10.0 11.9 13.0 16.0 20.0 22.0 26.0 material diameter inch 0.156 0.217 0.276 0.331 0.394 0.488 0.512 0.630 0.787 0.866 1.020 mm 4.0 5.5 7.0 8.4 10.0 11.9 13.0 16.0 20.0 22.0 26.0 wll maximum lbs 400 800 1,300 1,900 2,650 3,700 4,500 6,900 10,600 12,800 17,900 kg 180 365 580 860 1,200 1,680 2,030 3,130 4,800 5,810 8,140 proof test minimum lbs 800 1,600 2,600 3,800 5,300 7,400 9,000 13,800 21,200 25,600 35,800 kn 3.6 7.2 11.6 16.9 23.6 32.9 40.0 61.3 94.3 114.1 159.1 breaking force minimum lbs 1,600 3,200 5,200 7,600 10,600 14,800 18,000 27,600 42,400 51,200 71,600 kn 7.20 14.40 23.20 33.80 47.20 65.80 80.00 122.60 188.60 228.20 318.20 inside length maximum inch 0.94 0.98 1.24 1.29 1.38 1.64 1.79 2.20 2.76 3.03 3.58 mm 23.90 24.80 31.50 32.80 35.00 41.60 45.50 56.00 70.00 77.00 90.90 inside width minimum inch 0.25 0.30 0.38 0.44 0.55 0.65 0.72 0.79 0.98 1.08 1.25 mm 6.40 7.70 9.80 11.20 14.00 16.60 18.20 20.00 25.00 27.50 31.70 grade 43 high test chain chain size inch 1/4 5/16 3/8 7/16 1/2 5/8 3/4 7/8 mm 7.0 8.7 10.0 11.9 13.0 16.0 20.0 22.0 material diameter inch 0.276 0.343 0.406 0.468 0.531 0.630 0.787 0.866 mm 7.0 8.7 10.3 11.9 13.5 16.0 20.0 22.0 wll maximum lbs 2,600 3,900 5,400 7,200 9,200 13,000 20,200 24,500 kg 1,180 1,770 2,450 3,270 4,170 5,910 9,180 11,140 proof test minimum lbs 3,900 5,850 8,100 10,800 13,800 19,500 30,300 36,750 kn 17.3 26.0 36.0 48.0 61.3 86.5 134.7 163.3 breaking force minimum lbs 7,800 11,700 16,200 21,600 27,600 39,000 60,600 73,500 kn 34.60 52.00 72.00 96.00 122.60 173.00 269.40 326.60 inside length maximum inch 1.24 1.29 1.38 1.64 1.79 2.20 2.76 3.03 mm 31.50 32.80 35.00 41.60 45.50 56.00 70.00 77.00 inside width minimum inch 0.38 0.44 0.55 0.65 0.72 0.79 0.98 1.08 mm 9.80 11.20 14.00 16.60 18.20 20.00 25.00 27.50 grade 70 transport chain chain size inch 1/4 5/16 3/8 7/16 1/2 5/8 3/4 mm 7.0 8.7 10.0 11.9 13.0 16.0 20.0 material diameter inch 0.281 0.343 0.406 0.468 0.531 0.630 0.787 mm 7.0 8.7 10.3 11.9 13.5 16.0 20.0 wll maximum lbs 3,150 4,700 6,600 9,000 11,300 15,800 24,700 kg 1,430 2,130 2,990 3,970 5,130 7,170 11,200 proof test minimum lbs 6,300 9,400 13,200 17,500 22,600 31,600 49,400 kn 28.0 41.8 58.7 77.8 100.4 140.4 219.6 breaking force minimum lbs 12,600 18,800 26,400 35,000 45,200 63,200 98,800 kn 56.00 83.60 117.40 155.40 200.80 280.80 439.20 inside length maximum inch 1.24 1.29 1.38 1.64 1.79 2.20 2.76 mm 31.50 32.80 35.00 41.60 45.50 56.00 70.00 inside width minimum inch 0.38 0.44 0.55 0.65 0.72 0.79 0.98 mm 9.80 11.20 14.00 16.60 18.20 20.00 25.00 warning these chains must not be used in overhead lifting applications proof test and minimum breaking force loads must not be used as criteria for service or design purposes vanguard steel ltd.

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