Lag bolts are a type of heavy-duty fastener featuring their hexagonal heads and coarse threads. Whereas ordinary screws are designed to be screwed into wood, these bolts are only to be screwed in or adapted for concrete or masonry with proper anchors. This unique design makes them hold up substantial amounts of load generally for applications that require the utmost precautionary meas... https://www.dalloyedbolts.com/lag-bolts-manufacturers-suppliers-stockists-exporters.html