Specification: Thread Size: M8 x 1.25mm ;Thread Type: UNC ; Width: 13mm/0.51"; Height: 6mm/0.23";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 NutAdvantages: Flat solder joints, steel ,good weldability, thread size accuracy.
eBay