Abstract: A pair of molded plastic parts, fitted and secured together with an element of the clothing therebetween. The parts including a base having a hole with a circumferential locking surface, and a cover with a locking pin which enters the hole and has a shoulder engaging the locking surface, and non-releasably secures the parts together. Stabilizing pins on the cover engage the clothing element and prevent rotational movement of the cover relative to the clothing.