Fastener Hardware Build Your Dream Connecting hardware See All J. BoltHeavy-duty L-bolt and J-bolt foundation anchors engineered for securing structural components to concrete. N. BoltMild steel U-bolt with nuts, used for securing pipes, poles, or tubing to flat surfaces or brackets. Hex Head BoltA standard threaded fastener with a six-sided head, commonly used for mechanical and structural applications. Square U-BoltA robust, six-sided fastener engineered for heavy-duty structural and mechanical applications. Quarter-Turn Panel FastenerA quick-release, spring-loaded fastener commonly used to secure and remove panels in automotive, aerospace, and racing applications. L BoltHeavy-duty L-bolt and J-bolt foundation anchors engineered for securing structural components to concrete.