This Sammy's 8008957 Rod Anchor provides a secure anchor for threaded rods with its 3/8 in. female fitting on the screw head. The coarse threads of this fastener grip solidly into the wood and secure a tight connection between the wood base and the rod. It is a godsend for all your overhead wood construction needs. Ultra-sturdy, easy to use and code-compliant, it is the ideal choice for your pipe hanging, fire protection and electrical conduit applications.