AJ (Ackerman and Johnson)

Top Definition

An anchor that consists of an inner steel cone, with a cylindrical machine-threaded hole, surrounded by a lead jacket, cylindrical on the outside. You drill a hole in concrete or masonry the shape of the AJ, drop it in with the base of the cone toward the bottom of the hold, then force the lead down tightly in the hole by hitting the AJ driver


Of course it didn't hold--you threw the AJs in upside down.