A square nut is a four-sided nut comparing with standard hex nuts., which has greater surface in contact with the part being fastened,therefore it can provide greater resistance to loosening. S-metal offers normal type and chamfered type with square bolts for your choice.
Standards:DIN 557/ASME B 18.2.2
Material:Carbon and alloy steel
Surface treatment:electroplated,phosphated or H.D.G.
Tolerance: thread tolerance 6H
Product grade A DM16
Mechanical properties: class 6/8/10 as agreed.
Dimension in mm.