Connector with pre-assembled BIS RapidRail® Slide nut. To make rail fabrications. Suitable for WM15. Ready-to-use pre-assembled for a quick fixing, and retains assembly in place before final tightening. Material: metal parts made of steel 1.0332; spring(s) made of POM (polyoxymethylene), green. Zinc plated. Conforms to MFMA Metal Framing Standards (Metal Framing Manufacturers Association).