Tuttnauer 2540MK SAFETY THERMOSTAT (AUTOMATIC RESET) OEM #01620103

Tuttnauer door cover fits 2340m and 2540m. Square Polyrit pn# 02550004

Compatible Models – 23/2540M – Tuttnauer Autoclaves – Fits manual machines only with a date of manufacture before 1990 through 1994. (at this time Tuttnauer did no make an automatic machine.)

This door cover uses machine screws, NOT plastic screws. 

This is an old style door that uses machine screws. If your old door cover uses plastic screws this is not the right door for you.
Be sure and confirm your serial number before purchasing.