Abstract: A safety strap assembly for removably interconnecting a pair of engaging molds for a plastic molding or die cast die for retaining the molds against accidental separation and wherein a pair of laterally spaced shoulder bolts are secured to the molds respectively. A strap assembly comprises a locking plate spanning the dies and having a pair of spaced apertures terminating in keyhole slots adapted to receive the shoulder bolts and the bolts retainingly engaging the locking plate when in locking position. The locking plate is rotatable to an unlocked position disengaging the shoulder bolts from the locking plate. A locating cover overlies and pivotally mounted upon the locking plate and has a pair of spaced apertures receiving the shoulder bolts. The locking plate is rotatable relative to the locating cover until its apertures are in registry with the shoulder bolts.