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
GUN PAINT
What are the only guns not used in the work of modelers! From airbrushes to purchase homemade products from a school eraser and two cocktail straws. Today we want to introduce you with...
TRACTOR TRAILERS TRUST “LYSOSOMALLY”
In the first five years of the forestry of the country began to arrive, wheeled and crawler tractors (mostly "Stalinists"), which allowed largely to mechanize logging. Tractor mounted...
