Blind plug SKINDICHT® BL-M 20X1.5 +O-RING, Blind plug, Thread size: M 20, Nickel-plated brass, Halogen-free, UV-resistant, , Areas of application: For closing an unused metric thread/through hole on the housing,Withstands high chemical and mechanical stress,Suitable for outdoor use, Benefits: UL certification in accordance with technical data enables use of the product in North America,Article numbers ending in 'LF' are lead-free product alternatives with otherwise identical product properties. 'Lead-free' articles do not contain lead, which is currently permitted to make up up to four percent in copper alloys, but could be banned in the future according to the RoHS directive,Mounted O-ring enables the thread/through hole to be sealed liquid-tight and thus a higher protection class (up to IP 68),Withstands temperatures up to +100 °C,Existing groove on the thread ensures a secure fit and protection against twisting of the O-rings, easy installation using a slotted screwdriver