Hexagon Flange Head Self-Drilling Screws

Product  introduction

Hex head flange self-drilling screws are made of carbon steel or stainless steel. The hex head design is compatible with various wrenches and power tools, allowing for greater torque application to ensure firm fastening. The flange surface increases the contact area with the connected parts, effectively distributing pressure, preventing slipping and substrate damage, and enhancing anti-loosening performance, making it suitable for frequently vibrating or high-load working conditions. The self-drilling tail structure can directly penetrate materials such as metal and wood without pre-drilling, significantly improving installation efficiency.

The carbon steel type, treated with galvanizing or Dacromet, has high strength and a reasonable cost, suitable for conventional fields such as building steel structures and industrial equipment installation. The stainless steel type (such as 304, 316) has excellent corrosion resistance and can be used stably in harsh environments such as humidity, salt fog, and acid-base, often used in scenarios like outdoor projects, shipbuilding, and food processing equipment. The thread sizes range from ST3.5 to ST6.3, and the length ranges from 13mm to 70mm, suitable for the needs of different thickness plates. Widely used in container assembly, bridge joint connection, heavy machinery assembly, etc., they are produced in strict accordance with GB standards, and professional selection services are provided to ensure reliable and long-lasting connections.

Product information

Productname: Hexagon Flange Head Self-Drilling Screws

surface hardness: min HV450

core hardness: HRC28-38

Surface treatment：Color-Plated zinc 

Material: Carbon Steel  Stainless Steel

Specification: ST2.9 – ST6.3

Standard:  GB/T 15856.4