It is very important to follow guidelines to avoid cracking while screwing.
We recommended Fiable anti-corrosion class 2 coating, identified by \”F2\” head marking for long-lasting installation.

Recommended Screw Types: –

Self Drilling Screws

For all typical screw descriptions, the first figure indicates the gauge of the screw (g), the second figure indicates the threads per inch (TPI), and the third figure indicates the length of the screw (mm).

eg. 10-16x16mm

= 10 gauge, 16 threads per inch, 16mm in length.

Gauge
The gauge of a screw is determined by the basic size of the thread outside diameter. Standard gauges for screws are 

6 gauge 3.5mm  /  8 gauge 4.2mm /10 gauge 4.8mm/M6 6.0mm
12 gauge 5.5mm / 13 gauge 6.1mm/ 14 gauge 6.3mm 15 gauge 6.5mm 

TPI (Threads per Inch)
The TPI is the number of thread crests that can be counted along a lineal
measurement of 1 inch (25.4mm).

Length of fasteners

Head Styles

Wafer Head

Countersunk Head

Countersunk Ribbed Head

Screwing Process

• Screws should be placed at no more than 300 mm c/c spacing and not less than 15 mm from the edges and 50mm from the corners.

• Installation of the screws should be done in a spiral manner. You apply the center screw first and then continue in a spiral manner. If you are using a smaller board where there is no center screw you should start with a screw near the middle of the sheet. You must pre-drill holes in the material before attaching the screws.

• Do not overtight the screw, over tightening screws will restrict the movement of the panels, which will crack the panels. 

• The head of the screws should not penetrate the panel. This will cause damage

Follow above guidelines to avoid any cracking problem.