Qualfast NO.10UNFx3/4 SKT SET SCREW - KNURLED CUP POINT (GR-45H) (14.9)

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 1/4" are generally counterbored to provide maximum clamping efficiency.