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Screw Selection Chart
Pullout Values (Newtons) - Buildex Fasteners into Steel


  Screw Gauge/TPI Steel Thickness
    0.55mm
Batten
0.75mm
Batten
1.2mm
Stud
1.5mm
Purlin
1.9mm
Purlin
2.4mm
Purlin
6.0mm
Hot Roll Steel
8.0mm
Hot Roll Steel
12mm
Hot Roll Steel
                   
10g - 16 TPI Teks® - 1,860 2,320 4,200 5,500 7,820 - - -
                   
10g - 24TPI Teks® - - 2,320 4,280 5,820 7,680 - - -
                   
M6 RoofZips® 1,520 2,480 3,280 5,240 5,940 - - - -
                   
12g - 24 TPI Teks® - - - - - 6,260 16,700* 16,700* 16,700*
Hex + Wafer Series 500                  
                   
12g - 14 TPI Teks® - - 1,980 3,040 5,160 6,960 - - -
Screw length longer than 20mm                  
                   
12g - 14 TPI Teks® - - 2,200 4,080 5,420 7,360 - - -
Screw length 20mm or shorter                  
                   
12g - 24 TPI Teks® - - - - - 7,780 - - -
                   
14g - 10 TPI Teks® - - 2,600 4,680 6,500 8,100 - - -
                   
14g - 20 TPI Teks® - - 2,400 4,200 5,500 7,700 19,860 - -
                   
* Axial tensile value of screw

Note: Appropriate safety factors should be applied for design purposes.
All values are averages obtained under laboratory conditions.

These figures apply to Buildex® (BX Head marked) products only.
Pullout Loads (Kilo Newtons kN)
The load required to pull the fastener out
of the material it is screwed into.


Pullout Values (Newtons) - Buildex Fasteners into Timber, Lightweight Battens & Steel


  Screw Gauge/TPI Thickness
    0.55mm
Batten
0.75mm
Batten
1.2mm
Stud
1.5mm
Purlin
1.9mm
Purlin
F7 Pine
Timber
F17 Hard Wood Ultra
Hard Timber
                   
  10g - 12 TPI (T17s) 1,320 2,220 - - - 5,700 6,000 -
                   
  12g - 11 TPI (T17s) 1,510 2,400 - - - 3,900 6,460 -
                   
  14g - 10 TPI (T17s) 1,740 2,860 - - - 3,820 6,980 -
                   
  12 - 11 Batten Zips® 1,540 2,420 2,680 - - 5,710 6,460 6,960
                   
  M6 RoofZips® 1,520 2,480 3,280 5,240 5,940 4,300 6,570 -
                   
* Pullout values at 36mm embedment into timber                

Note: Appropriate safety factors should be applied for design purposes.
All values are averages obtained under laboratory conditions.

These figures apply to Buildex® (BX Head marked) products only.


Mechanical Properties

  Screw Gauge/TPI   Single Shear
Strength (N)
  Axial Tensile Strength (N)   Torsional Strength (Nm)  
  M6 RoofZips® 8,500 15,400 14.0
       
10g - 16 TPI 6,800 11,900 8.4
       
10g - 24 TPI 6,200 11,400 8.6
       
12g - 11 TPI 8,400 13,900 13.5
       
12g - 14 TPI 8,800 15,300 13.2
       
12g - 24 TPI 9,000 16,700 13.5
       
14g - 10 TPI 10,900 19,700 18.5
       
14g - 20 TPI 11,200 21,200 20,400
       
Note: Appropriate safety factors should be applied for design purposes.
All values are averages obtained under laboratory conditions.
These figures apply to Buildex® (BX Head marked) products only.

A. Single Shear Strength (N)
The shear load required to break the screw

B. Axial Tensile Strength (N)
The tensile load required to break the screw

C. Torsional Strength (Nm)
The torque required to break the screw


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