| | 1-1/2 1-5/8 1-3/4 sae grade 1 torque ft lb nm 3 4.1 w-200 6 8.1 11 15 1/2 sq 3 ... ,640 sae grade 5 torque ft lb nm recommended impact wrench wp-2050 ... sae grade 8 astm-a354 grade bd torque ft lb 11 23 40 nm 14.9 31.2 54.2 w-200 1/2 ... 2 1 4,400 19.6 6,510 28.9 8,930 39.7 11,920 15,290 18,980 28,050 38,800 50,900 66, ... 458 astm a325 torque ft lb nm recommended impact wrench tension ... kn 1 astm a490 torque ft lb nm recommended impact wrench 250 435 ...
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