Specification: Thread Size: M5 x 0.8mm ;Thread Type: UNC ; Width: 8mm/0.31"; Height: 4mm/0.16";Material: Carbon steel;Grade: 4.8.. Application: Used for pipe furniture, tables and chairs, shelves, vehicles, trolley casters and other threaded connection.. Steps: First clean the welding surface, using sandpaper or steel brush to remove the joint oxide.Second welding a little bit and adjust the verticality of the thread .Finally solder all the solder joints.. Package Content: 40 Pcs +/- 2 x Square Weld Nut. Advantages: Flat solder joints, steel ,good weldability, thread size accuracy..
