Features： 1、NUT SPECIFICATIONS: These hex coupling nuts are designed with female thread and hexagonal rod to provide good angular granularity for tools. 2、STAINLESS STEEL: Made of 304 stainless steel, rustproof and durable, has good corrosion and wear resistance, with a long service life. 3、EASY OPERATION: The coupling nut connects the two piece threaded rod from the opposite end, for hanging various items vertically or horizontally. 4、WIDE APPLICATION: Hex nuts are suitable for connecting bolts, studs, machine screws, threaded rods, etc., suitable for indoor and outdoor use. 5、5PCS IN 1 SET: Including 5pcs hexagonal coupling nuts, with standard size and thread, sufficient quantity for installation and replacement. Specification： Item Type: Hex Coupling Nut Material: 304 Stainless Steel Color: Silver Specification: M12x1.75-19-L50mm Purpose: Specially designed for fastening two parts together to make them one. Hex nuts are suitable for bolts, studs, machine screws, threaded rods, etc., and suitable for indoor and outdoor use. Package List： 5 x Hex Coupling Nuts