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A4 Bi-metal

A4 Bi-metal

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For increased high anti-corrosion and can be used outdoors, in industrial atmospheres, coastal areas and permanent moist indoor environments to obtain a minimum working life of 50 years, JOKER produced an A4 stainless steel shank welded with carbon steel sharp drilling point, and because Joker A4 self-tapping concrete screw with hi-low triple thread offers maximum pull out loading and efficient mounting.

 

A4-316 Austenitic Stainless concrete screw to be assessed by ETA by the end of 2022 in sizes 6, 8 and 10.

SIZE
Embedment depth in the concrete (mm)
DRILL HOLE DIAMETER (mm)
WRENCH SIZE(mm)
7.5X60
40 / 55
6
10
7.5X80
40 / 55
6
10
7.5X100
40 / 55
6
10
7.5X120
40 / 55
6
10
10.5X65
50 / 60
8
13
10.5X75
50 / 60
8
13
10.5X90
50 / 60
8
13
10.5X110
50 / 60
8
13
12.5X90
70 / 85
10
15
12.5X100
70 / 85
10
15
12.5X110
70 / 85
10
15
12.5X130
70 / 85
10
15
12.5X150
70 / 85
10
15

  • Joker concrete screw with an ETA 14/0374 assessment option 1, that can be installed in C20/25 to C50/60 cracked/ uncracked concrete for concrete screws in sizes 6, 8 and 10.
  • Smallest axial and edge clearance due to very low expansion effect
  • Very fast and easy assembly and immediately load-bearing
  • A4 concrete screw is also ideal for temporary fixings since it is fully removable. 
  • JOKER concrete screws are available with connection thread and with a range of different head shapes for a wide variety of applications.
  • Without assessment, can also be used in compression-resistant natural stone, various solid bricks and green concrete
  • Stainless steel A4 can be used in dry indoor conditions, outdoors including in industrial atmospheres and coastal areas or in wet rooms, provided that no particularly aggressive conditions are present.
  • Railings and handrails, steel beans, wooden beams, supports and braces, brackets, pipeline and cable routes, suspended ceilings, etc.

How to installation 

  1. Drill a hole in the base material, the hole should be drilled deeper than the screw embedment depth according to our ETA installation instruction (pilot hole required)
  2. Clean out the hole of all debris.
  3. Insert the pointed end of the concrete screw through the fixture and into the hole in the base material.
  4. Drive the screw or use a powered impact wrench slowly, allowing the threads to tap into the base material.
Video

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