Knurled Cup Point Set Screw
Knurled Cup Point hexagon socket set screws
Opposite side distance of hexagon socket  (S)
S=1.5mm S=2.0mm S=2.5mm
Nominal Dia. 
Pitch 
M3
P0.5
M4
P0.7
M5
P0.8
length  tolerance You click a cell of size, a drawing of detailed dimensions is displayed.
A size M3x4 is the nominal diameter M3, and length is 4.0mm.
3.0  ±0.20 M3x3
4.0  ±0.24 M3x4 M4x4
5.0  ±0.24 M3x5 M4x5 M5x5
6.0  ±0.24 M3x6 M4x6 M5x6
8.0  ±0.29 M3x8 M4x8 M5x8
10.0  ±0.29 M3x10 M4x10 M5x10
12.0  ±0.35 M3x12 M4x12 M5x12
MOQ/SPQ ; 1,000/1,000 pcs
MOQ(Minimam Order Quantity)  SPQ(Standard Packing Quantity)

Generally, small diameter of the hexagon socket set screws, if it is tightened strongly in the hexagonal bar spanner, hexagonal hole is cracked. But our hexagon socket set screws is using the Ni-Cr-Mo Steel (SNCM240) to the material. And furthermore, the precision of the hexagonal hole is good. In addition, the hardness by the heat treatment is high (HRC50 - 53), there is also toughness.

broken test Therefore, the hexagonal hole is not broken even if you tighten it until you can wrench off a hexagonal bar spanner. At that time, when you move the magnet to the hexagonal hole, because it does not have a hexagonal hole deformed, broken hexagonal bar spanner is attracted to the magnet, it will be drawn from the hexagonal hole.

Our hexagon socket set screw dries surface rust prevention oil with a vacuum hot-air drier after black oxide finish (surface treatment). Therefore, the hand of the assembling worker does not get oil at the time of work. In addition, this setscrews is easy to use in automated assembly, and it is hard to rust.