Hex Lag Screw This RFQ was sourced on www.MFG.com in USA for Hex Lag Screws 1/2" X 4" Hex Lag Screw. 3/4" socket. Material is steel with zinc plating. Buyer Information Industry Consumer Products City/Region Bolivar, Missouri Country USA RFQ RFQ Number 526877 Material Technical Specifications Category Hex Lag Screws Dimensions Get quotes online for manufacturing services at MFG.com from machine shops, fabricators, job shops and contract manufacturers. MFG.com connects buyers and suppliers when the buyer has a need and the supplier has the right expertise and capacity. MFG.com analyzes all engineered parts and RFQs for improved manufacturability and to ensure quality and a quick quoting experience. Hex Lag Screws: A hex lag screw is a heavy woodscrew with a hexagonal head that is driven in with a wrench.