Conduit Hanger With Carriage Bolt & Nut, For 2" Rigid, 2" Electrical Metallic Tubing, Use To Secure & Suspend Rigid Conduit, Imac Electrical Metallic Tubing Or Pac Conduit From Overhead Supports, Slotted Carriage Bolt Frees Both Hands For Installation, Each Part Is Stamped With Trade Size Markings.