This combination is consistent with the essence of modernization, which want to offer such a famous fixture as a screw. It is clear to everyone that it holds better than a nail, but it requires more effort and time for screwing. If it is to drive with a hammer, the material is crushed, it does not form a threaded groove. My screw (1) with longitudinal grooves on the threaded part, produced by forcing through a die (2). It is possible to drive a nail. You only need a little then turn the bolt with a screwdriver: the remaining part of the coils will cut into the material and will hold securely.
C. CUTTINGS, Leningrad
Recommend to read
VICTORY – FOR DESIGNERS
In the autumn of last year in Tashkent was held the second personal championship of the USSR on flying sport, which was attended by 53 athletes from almost all the Union republics of our...
LOADER BRAND “CUT”
Shiny from the oil the heavy stack of sheets... How to approach it, how to raise and load? Until recently, this operation was quite time-consuming — each pack got tangled up in the rope...
