Anchorage connectors are designed as the intermediary for securing a connecting device to an anchorage. Model 415 is a 1/2 inch diameter D-bolt, 1-1/4 inch long, one-piece unit with lock washer and nut. Model 416 D-bolt anchor is for up to 4 inch working thickness and includes a 5/8 inch diameter bolt with lock washer and nut. Model 417C concrete D-bolt includes a 5/8 inch stud-type expansion anchor that is ideal for applications with concrete, lightweight concrete and grout filled block that meet required specifications of 2,000 psi minimum. Can be installed on a vertical wall or overhead. 400 lbs maximum capacity. Complies with OSHA and ANSI Standards.