Description:

This 100 piece set of 4# 40x1/8 internal hex drive cup point grub screws is designed to prevent pulleys, gears, and other parts from rotating relative to the shaft.

• Size: 4# 40x1/8
• Material: Carbon steel
• Strength: 12.9 level
• Surface treatment: Black oxide
• Drive system: Internal hex
• Thread: Fully threaded
• Head type: Flat
• Fastener type: Machine screw
• Quantity: 100 pieces
• Features: Deep screw mouth for durability and a hex socket for easy tightening with a hex wrench