Description
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 M2.5, length 4 mm, thread M2.5, pitch 0.45 mm.
Sold in multiples of '200 pieces. 1 Box = '200 pieces.
Material, Grade & Strength
Grade 8.8 is a high tensile carbon-alloy steel property class with a nominal ultimate tensile strength of about 800 MPa and yield strength of about 640 MPa. It is suitable for general engineering joints requiring stronger clamp load than ordinary mild steel fasteners.
Finish & Corrosion Protection
Plain finish fasteners have no protective plated coating and are best used indoors, in oiled assemblies, in painted structures or where corrosion exposure is controlled.
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.
Data Sheet
Specifications
No structured specifications are available yet.