Ключевые слова: bolt, engineering, equipment, factory, fasten, fastener, form, handedness, hardware, helical, industrial, industry, iron, iso, lead, leadscrew, machine, manufacturing, mechanic, metal, metallic, metalwork, metric, nut, pitch, roll, round, screw, shaft, steel, stud, studbolt, thread, threadform, tighten, tool, turn, uts, work, workpiece,