Combo box of Unika 5mm concrete screws with round head + 1 …, North-Eastern Islands

>>Material: Silver-plated steel, super hard
Application: Used to install small components to hang household items
Base material: Concrete, natural stone, brick..
Product set name: Concrete screw without plastic stopper (with 1 round shank drill bit 4.0-4.5mm depending on the size of the customer) Usually the shop will include B4.3 or SB4.3 bits. If you want another size, please message the shop.
>>How to use: Drill the bait hole on the base material. Then, depending on the needs of use, we shoot screws before or after attaching the object to be anchored. Screws are shot directly into the wall without having to attach a plastic stopper.
Size: Various
- - M5x25 - - M5x25: 80 pieces/box
- - M5x35 - - M5: 70 pieces/box
- - M5x45 - - M5x45: 60 pieces/box
- - M5x60: - M5x60: 50 pieces/box
- - M5x70: - M5x70: 40 pieces/box
How to choose the right drill bit: Screw diameter Concrete wall brick wall block red brick wall
5mm 4.3-4.5mm 4.3mm 4.0mm
4mm 3.4-3.5mm 3.2-3.4mm 3.0-3.2mm
Screw bearing capacity 4mm 2.2kN 1.3kN 1.1kN

NOTE: + The above bearing capacity index is tested on P425 screws, 21N/mm2 intensity concrete. For ease of visualization, 1kN force will be equivalent to a weight of about 100kg. + To improve installation safety, it is recommended to apply a safety factor from 1/5 to 1/10
+ + The screw of the umbrella head has a u screw cap up to a circle, the bottom of the hat is flat, not a cone-shaped bevel like a flat head screw. Therefore, this type of screw is suitable for the installation of objects that require higher certainty, because when tightening the screw to the worker, it can be as comfortable as possible. Don't worry about screws sinking into objects, especially wood. In addition, this type of screw is also suitable for use when we need to attach screws that do not close to the wall (1 piece left over) to hang items, due to the surface characteristics under the flat screw cap, it is also limited. The hanger slips out of the screw (of course this is not easy to happen with flat head screws)

Producer: Unika Japan
Importer: Unika asean trading Co.,ltd
* Made in China
Advantages: Extremely good steel material, thick plating, high corrosion resistance. Very high bearing capacity (About 2.2kN for M4x25 screws), easy and fast construction.