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First,brief introduction
English name: keysert
Chinese name: bolt nut
Bolt is a kind of inside and outside has a screw thread, external thread on four root
or 2 pin key (below M6) special fasteners. Bolt screw set into the base hole of tapping
after, again put four bolt pressure, have strong fastening effect. Products are mainly
used in military industry, aerospace, railway locomotive, vibration machinery strength
of screw thread on the product of high demand.
Keysert bolt is the most basic function of a screw repair internal thread and strengthen
the external thread. Keysertt bolt as a kind of a screw thread repair method, to quickly
and efficiently to repair the damaged thread; Applied in low strength of material,
can greatly enhance the strength of the threaded hole.
Second, structure
1, 2 to 4 fixed button
2, sheath material for C1215 steel, and phosphate antirust processing
3, fixed key made from 302 stainless steel
4, easy to install and remove
Three, classification
Threaded models can be divided into: 1, according to the metric system, coarse thread, fine teeth.
2, according to a screw type can be divided into: light, thin, heavy, and track
Four, material
Carbon steel, stainless steel, bronze, nickel
Five, the surface treatment
Silver plated, cadmium plated, dry film lubricant
