Description: Female thread,304 stainless steel material. This rod coupling is designed with a female thread and hex rod. Installed with a sleeve , wedge , and all thread rod, etc. Specification: Product Name: Hex Coupling Nut Material: 304 Stainless Steel Finish: Polishing Thread Size: M8 x 1.25 Hex Width: 13mm/0.51" Length: 25mm/0.98" Package Content: 2 pcs x Hex Coupling NutNote: The inner middle section of the hexagonal stud is about 5-10mm without threads.