Oxygen Sensor Curve Notched Nut Bung M18 X 1.5 Threads (2PCS)Features:_x000D__x000D_Made of iron material for stability. _x000D_Stable performance and long time in use. _x000D_The thread pitch is 18mm x 1.5, which is the typical oxygen sensor thread pitch of 99% oxygen sensors on the market. _x000D_ FAB-PROS welded plug with round tube notch (also called "coped") to the bottom. _x000D_It is well used for precision welding of your round tubes. _x000D__x000D_Specifications:_x000D_Condition: New_x000D_Color: Shown as Picture_x000D_Material: Iron_x000D__x000D_Package List:_x000D_2 * Curve Notched Nut 1Made of iron material for stability. 2Stable performance and long time in use. 3The thread pitch is 18mm x 1.5, which is the typical oxygen sensor thread pitch of 99% oxygen sensors on the market. 4 FAB-PROS welded plug with round tube notch (also called "coped") to the bottom. 5It is well used for precision welding of your round tubes. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.