Cup Point Set Screws 4-40 X 3/4 Inch Alloy Steel Black Oxide Hex Socket Coarse Thread Grub Headless Screws 100 Pack Fits 0.050 Inch Allen Key Built Tough For DIY Pros And Shop Projects

Cup Point Set Screws, 4-40 x 3/4 in Alloy Steel, 100 Pack
✔️ 4-40 coarse thread, 3/4 in (19.05 mm) length, 0.050 in hex key

These cup point set screws are headless fasteners that thread along their entire length and use an internal hex drive. They're ideal for securing collars, gears, pulleys, and other components on shafts in DIY projects, workshop setups, and light industrial work where a flush profile is needed.

✅ Thread: 4-40
✅ Length: 3/4 in (19.05 mm)
✅ Material: Alloy steel, black oxide
✅ Drive size: 0.050 in hex key (Allen wrench) required

💡 What is a cup point set screw used for in mechanical shaft assemblies?

These handy fasteners lock components in place on shafts where a protruding head would get in the way.

• Useful for securing collars, gears, and pulleys on shafts with precise position
• Full-thread design provides even load distribution and strong retention
• Internal hex drive lets you install with a small Allen key in tight spaces
• Cup point edges grip the shaft to resist loosening under vibration