50x Qualfast M3X8 Socket Set Screw - Knurled Cup Point (GR-45H) (14.9)
Knurled Cup
High tensile alloy steel. Grade 14.9.
For quick and permanent location of pulleys, collars and gears on shafts. Will hold fast even in poorly tapped holes. Interrupted profile of clamping face resists loosening due to vibration. Sizes above M6 are generally counterbored to provide maximum clamping efficiency.