Square Nuts M4x13mmx3mm Zinc-Plated Metric Coarse Thread Assortment Kit 200pcs

Specification: Material: Carbon steel Grade: 4.8 Thread Size: M4 x 0.7mm Edge width:13mm/0.51 Height: 3mm/0.12 Package Content: 200Pcs x Square Nuts Notice for Choosing the Stainless Steel Type? The stainless steel is not absolutely rustless. It is just rust-proof in the proper condition. * For the indoor decoration or furniture stainless steel 201 or 304 (SUS201 SUS 304) can be used. But Type 201 should only be kept in dry condition. * For the outdoor condition with the polluted air in the extremely humid environment or somewhere with salty vapor such as by sea or swimming pool Type 316 or 316L should apply. * To bear the big load carbon steel is a good choice. Its finish can be Zinc plating or paint coating varying in the environmental conditions.