ISO 7380-1
Round head screws with hexalobular socket (ISR/TX)
Material: stainless steel
Quality: A2
Dimension: M4 x 40 mm
Also known as:
Truss-head screw, cup square bolt, Button head screw, Half round head screws, flathead screws, Round-head screw, Lense screws, with hexagon
Button head / Pan head screw ISO 7380 -1/-2
with hexagon socket
ISO 7380-1 with normal button head , ISO 7380-2 with button head with flange
Mit Regular thread. The pitch is therefore not stated explicitly.
Dimensions (Drawing see above):
s = wrench size
k = height of head
dc = diameter of head (-2)
dk = diameter of head (-1)
