Full specifications and comprehensive manufacturers’ cross-reference charts are provided for toggle, pushbutton, rotary, and rocker-style sealing boots. Also covered are bushing panel washers for sealed switches that protect mounting holes from spilled liquids that could seep past the panel surface to sensitive PC boards. A technical reference section, “Surviving Hostile Control System Environments” is also included.

APM Hexseal, 44 Honeck St., Englewood, NJ 07631, (201) 569-5700, apmhexseal.com