Typically, this may include use of stainless steel, IP sealing to a high level, possibly a spring-loaded insert cover to exclude dirt in service. Flange fittings, rear fittings, special cams, special inserts, custom barrels, adjustable depth mounting and special flanges are common requests.
Mainstream ex-stock locks are generally suitable of course for mainstream applications, for example, the EMKA compression latch with optical opening indicator for flush mounting. This item provides rear fixing for added security, visual open/close indication for easy status checking, adjustable depth mounting to suit different door thicknesses, compression action to ensure full compression of the gasket and is also anti-vibration to prevent nuisance opening. All with multiple cam solutions and sealed to IP65.