The Tri-Star 340261 Mechanical Timer 60 min is a manual timing control designed to manage cooking or operational cycles in commercial ovens and similar foodservice equipment. It operates through a spring-wound mechanism that begins a countdown when the dial is set, automatically activating or switching circuits once the selected time expires. Featuring a .187" D-stem and 1-1/8" centre... https://www.partsfe.co.uk/tri-star-340261-60-minute-mechanical-timer-w-187-d-stem-1-1-8-ctrs-mt-screws