ignation Des FB11 FB12 FB20 FB23 FB24 FB61 FB62 FB63 FB64 FB65 FB66 Unifast Self tapping screw B-thread to heavy section steel Self tapping screws for pre-drilled holes. Intended for fastening in heavy section steel with thickness 4 - 25 mm. See installation instructions below for selection of drill diameter. Bonded EPDM sealing washer. ensions Dim 6,3 x 19 6,3 x 25 6,3 x 100 6,3 x 130 6,3 x 150 apacity Drill c cl. Corropsroiotenction Material asher Ø W /socket Bit tity/pack cription Quan Des C2 - C3 C1 - C2 C1 - C2 C1 - C2 C1 - C2 8 mm/ 16 3/8" 8 mm/ 16 3/8” 8 mm/ 16 3/8” 8 mm/ 16 3/8” 8 mm/ 16 3/8” 250 Carbon steel 250 100 100 100 6,3 x 19 6,3 x 25 6,3 x 38 6,3 x 50 6,3 x 65 6,3 x 75 8 mm/ C4 A2 16 3/8" 250 Stainless steel 8 mm/ C4 A2 16 3/8” 250 8 mm/ C4 A2 16 3/8" 250 8 mm/ C4 A2 16 3/8 200 8 mm/ C4 A2 16 3/8” 150 8 mm/ C4 A2 16 3/8" 150 Installation instruction Use continuous speed control or low-speed screwdriver, suitable speed 300-600 rpm. While waiting for the execution standard EN1090-4 to be completed, it is recommended that the procedure according to StBK-N5 - 33:842K is used to determine suitable hole diameters. Hole diameters according to the table below should be considered as guideline values. Guideline values for drill diameter for self tapping screws, B-thread Screw, Ø 6,3 6,3 Thickness, substrate 4,0 - 6,0 7,0 - 25,0 Drill hole, Ø 5,5 5,7 36 Marutex presentation pages 7-11 C F Paint systems pages 98-99
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