The HW1B-M4F10-G is a 22mm non-illuminated momentary-action mushroom head pushbutton manufactured by IDEC, featuring a 40mm mushroom head operator with plastic bezel and green button color. This switch is configured with 1 normally open (1NO) contact and employs finger-safe contact blocks offering IP20 protection as standard. The device incorporates slow make double break self-cleaning contacts and is designed with a locking lever removable contact block for easy maintenance and assembly. The HW1B-M4F10-G is suitable for industrial control applications requiring reliable momentary switching, emergency stop circuits, and operator interface panels where tamperproof construction and worldwide approvals (CE, UL, CSA, CCC, TÜV) are essential.