A Exclusive type of bolt that is established into concrete, with screw threads protruding previously mentioned the concrete floor to simply accept a nut. Flange screws are generally known as frame screws. The head of your flange screws could be round to hexed and they are extended out from circular https://typesofroofmaterial27261.blogerus.com/52091512/an-unbiased-view-of-what-is-a-lead-screw