Hexagon Socket Set (grub) Screw Cup Point - DIN 916, Stainless Steel, Grade 18/8 - (A2) 304, M4 x 4 MM

Overview

DIN 916 defines a hexagon socket set screw, commonly called a cup point grub screw. The headless design allows the screw to sit inside or flush with the component, while the cup point bites into the mating shaft or surface to resist movement.

This selected size is specified with diameter M4, length 4 mm, thread M4, pitch 0.7 mm.

Sold in multiples of '200 pieces. 1 Box = '200 pieces.

Material, Grade & Strength

A2 stainless steel, commonly associated with 304 stainless, provides good general corrosion resistance for outdoor, clean industrial and food-related environments. Stainless threads can gall, so suitable anti-seize may be required.

Finish & Corrosion Protection

Corrosion resistance is provided by the stainless material itself rather than a plated coating.

Typical Uses

DIN 916 cup point grub screws are used for collars, pulleys, gears, handles, knobs, hubs, shaft-mounted components and mechanical adjustments where a protruding head is not required.

Technical Tips

• The cup point can mark the shaft or mating surface, which is useful for grip but may not suit delicate components.
• Use the correct hex key size to prevent rounding the socket.
• Apply threadlocker where vibration is present.
• For repeated adjustments, consider whether the point style is suitable for the shaft material.

Frequently Asked Questions

What does the cup point do? The cup point digs slightly into the mating surface to improve grip and resist rotation or sliding.