DIN 404 sealing screw

d – nominal thread diameter
P – threading step
dk – the diameter of the cylindrical head of the screw
k – the height of the screw head
n – the width of the screw slot
t – slot depth, min.
dh – the diameter of the radial holes in the head
w – distance from the center of the hole to the end of the head
b – screw thread length, max.
l – screw length

DIN 404: main characteristics

A screw with holes in a cylindrical head belongs to the category of irreplaceable fasteners in most modern productions. Due to the peculiarities of its design, its domestic use is very limited. Sealing screw DIN 404 is a high-strength rod with a specific thread, the enlarged head of which is equipped with a deep straight slot and two holes. Thanks to the radial axes of such recesses, the process of attaching sealing parts is simplified. It is often installed in the usual places of connections in the role of ordinary fastening hardware with locking. Operational qualities and technical parameters Please note that the din 404 screw is produced in different variations: dimensions, raw materials and the coating used determine the basic functional properties of this hardware. The Eurobolt company provides the most popular types and types of sealing bolts in Kyiv, which you can buy right now: we work without intermediaries, so the price is lower than most market offers. Positive reviews of our customers noted such advantages of the screw with holes in the cylindrical head, such as: increased resistance to corrosion; tolerance to aggressive chemical solutions, including acids; resistance to systematic or periodic exposure to high temperatures in combination with excellent mechanical strength indicators (provided the addition of austenitic steels); reliability and guaranteed protection against involuntary unscrewing, shifting or unwanted rotation; environmental friendliness and complete safety during installation and further use.