That is a recessed screw mount.
The location is will be mounted. Whether is be recessed, or surface mounted. If you plan on ganging boxes or not for multiple switches or receptacles. The amount of wires that will be entering/exiting the box.
PITS
pit
Normally it is mounted on the engine block. The surface is called the oil filter mounting surface.
Surface Mounted Device
The 2008 National Electrical Code (NFPA 70) Article 410.136 (B) requires surface mounted luminaires containing a ballast to be listed for mounting on the fiberboard or they must be mounted not less that 1 1/2 inches from the surface of the fiberboard.
Pitless weighbridges have the weighing surface at ground level, making them easier to install and maintain compared to pit type weighbridges which require a pit to be dug for the weighing surface. Pit type weighbridges are usually more expensive but provide better protection from environmental factors.
collage
Having same problem with mine, I have read that this is caused by rust on the surface that the rear abs sensors are mounted to. This apparently increases the distance between the sensor and the part on the wheel that the sensor monitors. Advised fix is to clean rust from surface, if this does not work the addition of a thin washer between sensor and the surface it is mounted on may be required to restore the appropriate gap. Will be trying this this weekend. Good luck.
A recessed cooktop is a cooking appliance that is installed into a countertop or cabinet in a way that it sits below the countertop surface. This design creates a seamless and streamlined look in the kitchen. It helps to save space and makes cleaning easier since there are no edges or crevices for spills to accumulate.
SMD stands for "Suck My D--k"SMD: Surface Mount Device