Ключевые слова: abstract, background, black, bolt, building, closeup, connection, construction, dowel, engineering, equipment, fastener, group, hardware, head, heap, industrial, industry, iron, isolated, macro, mechanical, metal, metallic, parts, repair, screw, screwdriver, self, selftapping, shiny, silver, steel, supplies, tapping, texture, threads, tool, white, work, workshop, zinc,