Flange screw is a kind of fastener mainly composed of a hexagonal head
and two parts of a flange and a screw, which needs to be
matched with the nut for fastening and connecting
two parts with a through hole.
The shear steel structural bolt consists of a bolt, a nut and a washer. On the
general steel structure, the required steel structure bolts are above
8.8 level, and 10.9 level, 12.9 level, all of them are
high-strength steel structure bolts, and sometimes the bolts on
the steel structure do not need plating.
The detachable connection structure is often used between the cylinder
and the head, the pipe fitting and the valve of the pressure vessel to
facilitate the needs of the production process and the convenience of
manufacturing, transportation, installation and maintenance. Common
flange connection, threaded connection and socket connection. The flange
connection has the advantages of reliable sealing, sufficient strength and
wide application range.
Because the fasteners with black zinc plating have good corrosion resistance and wear resistance, they are suitable for harsh working environments, such as Marine environments and chemical equipment.In addition, black zinc plated fasteners are also commonly used in occasions requiring higher aesthetics, such as automotive, electronics and other industries.
Quality
Certification
The length of the torsional high-strength bolt is the length from the lower supporting surface of the screw head to the cut of the screw
tail. The torsional high-strength bolt has a torsional head at the tail of the screw. The special wrench is used to tighten the nut during construction. They all belong to the friction type of high-strength bolt, can be replaced, but the torsional shear type of high-strength bolt does not need to calculate torque, torque is easy to ensure, can avoid due to calculation errors or the use of ordinary wrench instead of torque wrench, which can not ensure the phenomenon of final twisting torque.
inspection
Bentley has invested a huge amount of money to build a product testing laboratory, equipped with imported high-end instruments: such as thread comprehensive scanners, high temperature tensile testing machines, high frequency fatigue testing machines, etc., to ensure that all products are strictly tested before leaving the warehouse to ensure the reliability of customers during use.
