Thread Size M4 (4mm). Screw Size: M4 X 80MM. Thread Size: M4. They are designed distinctively for use with softer materials like plastic. Thread Length (L) 80mm. Rail Height: 80MM. M3 M4 M5 M6 M8 M10 M12 M16 SERRATED FLANGED NUTS A2 STAINLESS STEEL DIN 6923.
