Material: Brass with nickel plated Sealing element: NBR Thread Type: PG according to DIN 40430 Protection class: IP54 IP68(Assemble O-ring in the tightening part ) Range of temperature: -40℃to+100℃ Application: Use slot type screwdriver tightening fixed,to seal the reserved hole Remark: if you need other marterial of sealing element,such as silicone,EPDM,etc.pls feel free to contact us!