Steel Mart supplies Screw Pin. Steel Mart is an ISO 9001-2000 certified company. The Screw Pin includes Working Load Limit permanently shown on every shackle. They come as Forged - quenched and tempered, with alloy pins and have capacities 1/3 thru 300 tons. Maximum proof load of Screw Pin is 2 times the working load limit. Breaking load is 6 times the working load limit. They are furnished with round head bolts and welded handle.
