Thread Size and Fit Check
The M4 thread on the 223982-1 is a standard metric coarse thread (0.7 mm pitch). The 7-6G tolerance class means the thread is a 6G fit — a medium tolerance free fit for general-purpose alignment. When replacing a guide pin in the field, confirm the mating threaded hole is also M4 and that the 7 mm thread length does not bottom out before the pin fully seats. The pin is packaged in a tray, not loose, which keeps threads protected during handling.