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
BY “DIMLY”
As a rule, in all our homes — three-wire system on the chandeliers, combined with the series switches, providing three options of illumination. For patipanno chandeliers — two, three and...
RIVETS? ANY!
If you don't have the rivets you need sizes, don't rush to the store. Better fabricate a device which you can use to make rivets of all sizes. Tools required the simplest set of drill...
