Staff Answer
May 13, 2026 - 10:56 AM
The Kacon B30-21B-N40 Momentary Push Button has a panel cutout diameter of 30mm. The diameter of the mushroom head is 40mm. This push button comes with 1NO and 1NC contact blocks. The contact blocks are replaceable and can be purchased separately if needed. If just the contact blocks are needed, you can email us at sales@majorelectronix.com for a quote on part number BCB (NC contact block) or BCA (NO contact block).
