Parts	MRH	MRS	MRE	MRZ
Classification	Standard	Customised			Customised	Customised
Operating environment	Standard environment			Standard environment	Standard environment	Special environment
Nut appearance
Material	Polyamide resin type			Polyamide resin type	Polyamide resin type	Polyether ether ketone type
Features	Balanced performance			Balanced performance	Balanced performance	Flame resistance, heat/water resistance
Other	Good C of E	-	Good electrical conductivity	Food hygiene, chemical resistance
Mechanical strength	◯	◯	◯	◎
Heat resistance	◯	◯	◯	◎
Wear resistance	◎	◎	◎	◯
Chemical resistance	◯	◯	◯	◎
Machinability	◎	◎	◎	◯