EE Controls offers Keyed Safety interlock switches in regular duty (plastic body) and heavy duty (metal body) configurations. SKT interlock regular duty switches have a 2" minimum closing radius "MRU" key, temperature ranges from -22 to 176°F, a NEMA 4/12 enclosure, a 10 mA current rating, 10 mechanical operations, and a positive opening N.C. contact.

Schmersal, Inc. offers a variety of keyed interlock switches. AZ 15 keyed interlock switches have multiple codings, large wiring compartments, a high level of contact reliability, slotted holes for adjustment, circular holes for location, and they have a thermoplastic constructed enclosure. The actuator has a radius range from 35 to 150 mm, and it comes in angled, flexible, straight, rubber mounting, and rigid configurations.