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SCREWS SELECTION CHART
CORROSHIELD SELF DRILLING SCREWS
FOR SELF DRILLING IN STEEL PURLIN THICKNESS OF 6MM
PURPOSE USE  
STICHING SHEET TO SHEET 10-16X16MM  
GUTTER FIXING 10-16X16MM
FIXING OF FLASHINGS 10-16X16MM
VALLEY FIXING FOR WALL  
CLADDING 12-14X20MM
  12-14X25MM
  12-14X30MM
CREST/PROFILE FIXING 12-14X45MM
DEPENDING ON THE SIZE OF THE PROFILE 12-14X55MM  
  12-14X65MM  
  12-14X90MM  
  12-14X130MM  
FOR SELF DRILLING IN THICKNESS OF STEEL PURLINS ABOVE 6MM
VALLEY FIXING 12-24X32MM  
PROFILE/CREST FIXING 12-24X60MM  
     
CORROSHIELD
SCREWS SIZE IDENTIFICATION
FOR SCREWS DESCRIPTION THE FIRST FIGURE INDICATES THE GAUGE OF THE SCREW[G]
THE SECOND FIGURE INDICATES THE THREAD PER INCH[TPI] AND THE THIRD FIGURE IS THE LENGTH OF THE SCREW[MM]

eg 12-14X20MM
GAUGE MM
12 GAUGE,14 THREAD PER INCH,20MM INLENGHT 10G 4.8MM
  12G 5.5MM
 
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