The present disclosure provides an apparatus and method for forming a composite structure. The apparatus comprises a bond assembly jig having a support plate, an anchor member attached to the support plate, and a block member connected to the anchor member such that the block member is permitted to move in a vertical direction. The bond assembly jig can be arranged within an autoclave and may further comprise a shroud that is arranged to shield the anchor member and the block member from the pressures exerted within the autoclave. The method is accomplished by assembling the anchor member and block member on the support plate, arranging the composite materials, placing a caul component over the composite materials and a shroud over the anchor member and block member, and applying heat and pressure to the bond assembly jig to cure the composite materials.