DIN916 Hexagon Socket Cup Point Set Screw (also known as grub screw or allen set screw) is manufactured according to the German DIN916 standard (ISO4029). It is a headless fastener featuring an internal hexagon socket and cup point end, widely used for fixing the relative position of shafts, pulleys, couplings, and mechanical components to prevent rotation and displacement.

• Standard Compliance: Strictly produced to DIN 916, metric thread, full thread design.
• Structure: Internal hex socket for allen wrench installation; cup point provides strong gripping force on the mating surface, with good anti-slip and anti-vibration performance.
• Available Materials:
  • Stainless Steel: A2 (304), A4 (316) for corrosion-resistant, marine, wet, and chemical environments.
  • Alloy Steel: 45H / 12.9 grade high-strength carbon steel, black oxide finish for heavy-load mechanical assembly.
• Surface Finishes: Plain, black oxide, zinc plated, passivation for stainless steel.
• Size Range: Metric M2, M2.5, M3, M4, M5, M6, M8, M10, M12 up to M24; custom lengths available.
• Easy Installation: Fully sunk after tightening, no protruding head, saves installation space.

We offer comprehensive OEM and ODM services to meet your specific requirements:

• Custom head styles, drive types (Phillips H / Pozidriv Z), and thread designs
• Special lengths, diameters, and tolerances
• Specific material grades and surface finishes
• Custom packaging with your branding (labels, boxes, bags, blister packs)
• Logo engraving on screw heads

• Professional fastener manufacturer with over 10 years of export experience
• Advanced automatic cold heading and thread rolling equipment ensuring consistent quality and fast delivery
• Strict quality control system from raw material sourcing to finished product
• Competitive factory-direct pricing with no middlemen
• Responsive customer service and technical support
• Flexible MOQ to accommodate both trial orders and bulk shipments

Bolts are packed in neutral packaging boxes with standard quantities arranged in small cartons. Custom packaging configurations are available upon request. Small cartons are consolidated into larger master cartons for secure transportation. Palletized units are wrapped with waterproof film and reinforced with packaging straps, with custom shipping marks available.