China Cheap price Self Drilling Masonry Screws - SD500 Self-Drilling Screws(Longer tail) – DaHe

These longer tail screws are a great alternative to standard tek screws and other screws for metal, allowing you to save time and user fatigue with the single action of drilling and fixing steel – one push, one screw done. Also known as Series500 screws the extended drilling tip guides the screw through just as the fine thread grabs hold and taps itself securely within the steel.
The SD500 self-drilling screw with an extended drill point for metal. Ideal for hardened or hot rolled steel and thick steel is not an issue for SD500 screws.
SD500 screws are designed to fix metal to metal, through thicknesses of up to 12mm in total without the need for pre-drilling or pilot holes into steel. Also can be used with timber to steel with the SD500 countersunk screw range.
SD500 screws are a self drilling screw featuring a extended (no. 5) drill point for drilling through steel up to 12mm.
Designed to cut its own mating threads into the material to fasten securely in one action. You can ensure effective installation by completely drilling through your joining material allowing the drill point to be completely drilled through.
Advantage&Feature:
1:These screws are designed for fastening metal wall and roof panels used in metal construction
2:Flange heads are designed to encapsulate EPDM washers, providing a secure seal
3:Fastener head design includes nutsetter ledge for better drivability
4:These screws are available in 25 standard colors or custom matched to your specific needs
 DaHe company can process carbon steel and stainless steel. And we can product screws as customer’s requirement.

Corrosion Resistance

1:zinc plated
2:Ruspert Class 3: external use in mild moderate industrial or marine environments. Corrosivity categories C2 and C3 classified accordance with ISO 9223. AS 2331.3.1 salt spray test for 1000hrs, DIN 50018 for 15 cycles (kesternich test).

Specification

NOTE:
Self drilling screws should NEVER be installed with an impact tool and should NEVER exceed 2500 RPMs. Impacts can damge paint and compromise the integrity of the screw.