BRIGHT ZINC SCREW
Self Drilling Screws offer quality with precision. These are cold formed with rolled thread for superior strength and fast drilling performance. Strictly adhering to DIN Standards, Welfast Self Drilling Screws are available in a dynamic assembly of diameter ranging from #10 – #12 with length ranging from 20mm – 100mm. Additional options of Coarse Thread and Fine Thread adds value to selection.
FEATURES
APPLICATIONS
INSTALLATION GUIDE
High Performance – Continuous thread design up to drilling point maximizes pullout performance and shear strength.
Precision – Drilling these screws is achieved in a single process thus eliminating the need of alignment or pre-drilled holes and thus ensuring precision.
Easy and Smooth Tapping – Its smooth thread allows easy and self tapping through the structure.
Easy to Use with Minimal Efforts – Design of these screws is so engineered that unskilled amateur can use them with minimal efforts.
Time Saving – Using these screws saves time by eliminating the need of alignment or pre-drilled holes.
Dual Functionality – Allows fastening to both, timber and steel.
Minimal Wastage – Reduces Wastage
Roofing assembly
Brick Tie systems to metal studs
Decking to bar joist
Electrical boxes to metal studs
Light Gauge steel to structural steel
Masonry Ties to steel studs
Metal Building
Steel Channel to joists
Steel Frames
Stitching Deck Side Laps
Window Mullion to Steel Base
Insert the 8 or 10 mm (according to required size) hex head adapter into the drill motor. Center the adapter into the drill’s chuck to ensure that adaptor does not wander.
Put on the safety glasses to protect your eyes.
Inspect the hex end of the adaptor for cleanliness. If metal shavings are built up inside the tip, insert the drilling end of the screw into the cavity of the hex head while holding the trigger of the drill.
Place a self-drilling screw into the hex head adapter.
Depress the trigger of the drill slowly, while the drilling tip of the screw rests against the metal. Increase the speed of the drill when the screw finds its center.
Stop drilling when the head of the self drilling screw tightens against the surface of the metal. If the drill you are using does not have a clutch, pay close attention to the screw head, as too much pressure will either snap the screw of strip the threads formed in the metal by the screw.
Perform Step 3 before you install another self drilling screw.
TECHNICAL DESCRIPTION
Self Drilling Screw – #3 :
Hex Washer Head with Black Washer – Coarse Thread | |||||
Sr. No. | Size (mm) | Drill Point | Drilling Capacity (mm) | Pcs / Box | Pcs / Carton |
1 | 4.8 x 16 x 19 | #3 | 3 | 600 | 2400 |
2 | 4.8 x 16 x 25 | 3 | 550 | 2200 | |
3 | 5.5 x 14 x 25 | 4 | 500 | 2000 | |
4 | 5.5 x 14 x 35 | 4 | 400 | 1600 | |
5 | 5.5 x 14 x 45 | 5 | 350 | 1400 | |
6 | 5.5 x 14 x 55 | 5 | 250 | 1000 | |
7 | 5.5 x 14 x 62 | 5 | 200 | 800 | |
8 | 5.5 x 14 x 68 | 5 | 200 | 800 | |
Self Drilling Screw – #4 / #5 :
Hex Washer Head with Black Washer – Coarse Thread | |||||
Sr. No. | Size (mm) | Drill Point | Drilling Capacity (mm) | Pcs / Box | Pcs / Carton |
1 | 5.5 x 14 x 20 | #4 | 5 | 500 | 2000 |
2 | 5.5 x 14 x 25 | 6 | 500 | 2000 | |
3 | 5.5 x 14 x 35 | 400 | 1600 | ||
4 | 5.5 x 14 x 45 | #5 | 8 | 350 | 1400 |
5 | 5.5 x 14 x 55 | 250 | 1000 | ||
6 | 5.5 x 14 x 62 | 200 | 800 | ||
7 | 5.5 x 14 x 68 | 200 | 800 | ||
8 | 5.5 x 14 x 75 | 150 | 600 | ||
9 | 5.5 x 14 x 90 | 150 | 600 | ||