DIN 444 hinged bolt

Analogues of DIN 444:

GOST 3033-79 Retractable bolts with thread diameter from 5 to 36 mm, not intended for machine tools. GOST 14724-69 Retractable bolts intended for machine tools. GOST 14725-69 Folding bolts with a trapezoidal thread, designed for machine tools.

Marking:

d1 – nominal diameter of the thread P – threading step d2 – inner diameter of the ring d3 – outer diameter of the ring s – width of the ring, no more than b – length of the thread, at least l – length of the bolt

Folding bolt DIN 444

The DIN 444 hinge bolt or “loop screw” is distinguished from all others by its unusual construction, which consists of a metal rod with an eye/loop, the outside of which can be full/partial inch threads. During installation, any lever at hand is inserted into the loop. Such a fastening element primarily has a large range of operation of the fastening and increased anti-corrosion properties thanks to a special protective high-tech coating. The folding bolt DIN 444 is most often used to create high-strength fixation of individual elements of machine parts and devices for production needs, it is also often used in the repair of nodes in other areas, for example, in construction for fastening ceiling, wall parts and rigging structures together with anchors. A properly selected hinged bolt with an eyelet will allow you to securely fasten the cover, as it will play the role of a component part of the threaded connection. To buy a quality product, you need to pay attention to the following characteristics: strength class (4.8-12.9), thread form (A, C, L), presence of coating (zinc). The wide selection of such fastening elements is determined by the peculiarities of their manufacture and depends, first of all, on the grade of steel, production technology and special heat treatment. But the strength of the product is directly related to the field of application of the folding bolt and the loads on the finished structure.