Fasteners shaped meet the definition of screw, but with significant design improvements (primarily a form of thread, tip and slot), made of high quality materials with a variety of corrosion-resistant coatings and aesthetic.
These improvements allow frequently used screws without pre-drilling holes (which greatly simplifies and accelerates the installation process and secured products), and apply the screws for mounting on a metal (aluminum, steel, etc.) The basis and building materials (concrete, bricks,etc.).These screws have substantially expanded the area of their application, the technology significantly influenced many construction and Smith.
Since the new screws is fundamentally different from the traditional, in common parlance, a new term - screws.This concept is more accurately reveals the purpose and capabilities of the new screws, although to date it is not legitimized by the relevant standard.Of course, the term "samonarezy" semantically more precise and correct, but the word
(from the German Schraube - screw)
screw for fastening wooden parts.Conical screw-threaded rod and a head, which is usually done by a slit (slot) for the screwdriver.
GOST 27017-86 - Fasteners in the form of a rod with a special outer thread, a threaded end and a tapered head at the other end, forming a thread in a hole connectable wood or plastic products.
definition GOST suggests that the screw is screwed into the prepared hole, and is used for mounting on a wooden or plastic bases.These screws are usually made of mild steel (CC1, CC2, St3, 10PP) uncoated, less of Inox steel (also in brass).Traditionally produced and manufactured mainly domestic hardware industry today.
Detail for bonding parts of structures and machines.Anchors are laying the foundations in the construction material - concrete, masonry, etc.
Anchors are held in the building material at the expense of the three main working principles: friction, stress, bonding.
Many types of anchors are held in the material foundations of the building due to a combination of these principles - the friction and stop.
Anchor - a metal (usually steel) design, fixed in meterialy construction (concrete, brick, and so on. D.) And having a threaded element (bolt, screw, stud, sleeve with metric thread) for connection dostatachno heavy and loaded units,parts or structures.