Abstract: A casing pipe thread protector which includes a body member molded of flexible material, such as urethane, with memory/resiliency characteristics, having a central opening through which a pin end of a length of casing will fit, the body member in a molded slightly open position, to accommodate the casing, a strap set within a channel formed around the annular wall of the body member, the strap having a locking member at its first opposing end, and an adjustment screw, so that the strap can be adjusted to various locking tightness. Upon sliding the pin end of the casing in the central opening, the locking member is moved to the closed position, tightening the body member around the pin, so that the threads are completely encircled around the pin end.