Stainless Steel Screw 316 Bi-metal Screws Hex Self Dring 4.8/5.5/6.3

Bi Metal Screws Self Drilling Screws Introduction

Stainless steel bi metal screws self drilling screws are made from stainless steel 304 or 316 and carbon steel. The material of head and thread is stainless steel. But the material of drill point is carbon steel. Because the carbon steel is harder than stainless steel 304 and 316, so these bi metal screws can drill the metals easily and also have the super corrosion resistance property. Generally, the Stainless steel bi metal self drilling screws are widely used in air conditioning, refrigeration equipment, machinery manufacturing and other fields. 

Bi Metal Screws Self Drilling Screws Description

Head Type: hex, hex flange

Thread: full thread/half thread/thread with slots/thread with two wings

Diameter: M 4.8, M 5.5, M 6.3

Length: 16 mm - 300 mm

Surface treatment: zinc plated, Ruspert 500 hours, Ruspert 1000 hours, Ruspert 1500 hours

Drill type: # 1 , #2, #3, #5, # 17

Package: 1000 pcs / 500 pcs / 250 pcs per small box+ carton, plastic bucket, carton

Customization: head mark, wing thread

Advantages of Bi Metal Screws

• the alloy steel point can greatly improve work efficiency - save time 50%
• the anti corrosion capacity of stainless steel part can up to 50 years
• Ruspert surface teatment can provide excellent anti corrosion property
• the carbon steel drill point can drill 12 mm thick metal plate
• the quality is close to Taiwan quality, but price is cheaper about 20%

Advantage of Our Factory

• We have the Taiwan qualtity machines to drawing wire, making screws, threading, heat treatment and digital monitoring
• There are professional staffs and equipment to test the quality of screws before packing
• We have our own science and innovation department to meet the demand of global market
• Our factory is located in Tianjin, it is next to Tianjin port. So the transportaion is convenient and charges are cheaper