ITEM NAME:2 Pieces Stainless Steel O2 Oxygen Sensor Exhaust Bung Nut M18x1.5mm Threads Description: Made of high quality stainless steel material. Durable, never fade. Withstands high exhaust temperature. Easy-to-screw threads or can also be welded. Perfect to replace old or broken nut. Specification: Material: 304 Stainless Steel Internal Thread: M18 x 1.5mm Package Includes: 2 Pieces O2 Nuts Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture carefully before making.2 Pieces O2 Nuts. Easy-to-screw threads or can also be welded. Perfect to replace old or broken nut. Made of high quality stainless steel material. Material: 304 Stainless Steel. Withstands high exhaust temperature.