[M4×L10]

Button-bolt with hex hole in a flat washer shape The wide seat surface reduces looseness and allows for stable tightening. It can be tightened stronger than cross holes. The seat is wide, so you can increase the hole on the objects you tighten it. The seat is used to replace flat washers to reduce the number of parts. Head height is lower and wider than hexagonal bolt It is mainly used when you want to tighten the head with a hex wrench, or where you do not want to make your head stand out. Features a rounded head shape and is also known as a button cap. Since there are no corners, it may be selected for safety performance. [Features] Tighten with a hex wrench similar to a bolt with a hex hole. RoHS 2 compliant product.