: Sizes generally range from small M2 to M8 diameters.
: The pan head's diameter and height are often 5% to 20% smaller than a standard pan head to accommodate the captive washers efficiently. Common Materials : jis b 1188 pdf
: The latest standard is JIS B 1188:2017 , which superseded the 1995 version. Key Specifications (Example M4 Dimensions) : Sizes generally range from small M2 to M8 diameters