China China Suppliers DIN 7504 Stainless Steel Self Drilling Screw With Rubber Washer Hex Head Self Drilling Roofing screw factory and suppliers

China Suppliers DIN 7504 Stainless Steel Self Drilling Screw With Rubber Washer Hex Head Self Drilling Roofing screw

Short Description:

Name:China Suppliers DIN 7504 Stainless Steel Self Drilling Screw
 With Rubber Washer Hex Head Self Drilling Roofing Crew
Material: Stainless steel/carbon steel.
Color:  Sliver/black/zinc
Standard:  DIN ISO JIS GB ANSI ASME BSW
Grade:  A2-70/A4-80/4.8/8.8/12.8
Package:  Standard export packing or according to buyer's requirements

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Self-drilling screws are easy to distinguish if you look at their point, which curves gently at the end and is shaped like a twist drill.
screws are processed through cold forging to strengthen the tooth pattern throughout the entire process, maintaining the unique corrosion resistance characteristics of each stainless steel without any heat treatment. They are smoothly screwed into the tooth pattern in a stable and non-destructive manner, achieving excellent performance in tightening the structure against pulling and wind stripping.
The screw surface is protected by a baked ceramic layer and a galvanized layer, coupled with 304 stainless steel+EPDM one-piece gasket to isolate water vapor, prevent electrochemical corrosion, and ensure the safety of fixation with carbon steel purlins
EPDM washer is a sealing gasket typically made of EPDM (ethylene propylene rubber) material. EPDM is a high performance rubber with good weather resistance, corrosion resistance and aging resistance.
High Efficiency:One-Step Installation:Eliminates the need for pre-drilling. The specialized drill point allows for drilling, tapping, and fastening in one single operation on steel sheets (up to 2-6mm depending on size), saving labor time and tool costs.
Superior Driving & Holding Power:The hex head design with a flange allows for higher torque transmission without stripping, ensuring proper seating and providing excellent tensile and holding strength for a more secure joint.

Poduct Application:
1. Apply to metal plate, galvanized steel plate, metal curtain wall, metal light compartment, aluminum
door and window, indoor and outdoor decoration.
2. General anglesteel, channel steel, iron plate, PC Board and other metal material combining
installation.
3. Suitable for assembling steel roof, automobile body, container, shipbuilding industry, freezing
equipment and so on.
Package: 1. We have several sizes of packing dimensions, can be 20kg or 25kg per carton; 2. For large orders, we can design specific sizes of boxes and cartons; 3. Normal Packing: 1000pcs/500pcs/250pcs per small box. then small boxes into cartons. 4. Can provide special packings as clients requests

size(mm)	size(mm)	size(mm)
4.2*13	5.5*32	6.3*25
4.2*16	5.5*38	6.3*32
4.2*19	5.5*41	6.3*38
4.2*25	5.5*50	6.3*41
4.2*32	5.5*63	6.3*50
4.2*38	5.5*75	6.3*63
4.8*13	5.5*80	6.3*75
4.8*16	5.5*90	6.3*80
4.8*19	5.5*100	6.3*90
4.8*25	5.5*115	6.3*100
4.8*32	5.5*125	6.3*115
4.8*38	5.5*135	6.3*125
4.8*45	5.5*150	6.3*135
4.8*50	5.5*165	6.3*150
5.5*19	5.5*185	6.3*165
5.5*25	6.3*19	6.3*185