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High-strength socket head bolts for steel structures
Product Description: High-strength structural shear bolts with tension control are high-strength fasteners specially designed for steel structure connections. Their core mechanism enables precise control of preload through “shearing off the hexagonal head on the bolt shank”, ma...
Description
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Product Description:
High-strength structural shear bolts with tension control are high-strength fasteners specially designed for steel structure connections. Their core mechanism enables precise control of preload through "shearing off the hexagonal head on the bolt shank", making them widely used in connections of heavy steel structures for buildings, bridges, and similar applications.
Main Structure and Working Principle:
The structure and working principle of tension control shear bolts are based on "precise force control" and "ease of installation", which distinguishes them from ordinary bolts.
Main Structure
Consists of a bolt shank, a threaded part, a head (usually hexagonal), and a "shear nut (cup-shaped head)" at the end of the shank. A key structural feature is a "breakable groove" with a smaller diameter between the shank and the shear nut (cup-shaped head), which serves as the breaking point when the required preload is achieved.
Working Principle
During installation, the inner sleeve of a special torque wrench clamps the bolt head, while the outer sleeve engages with the shear nut (cup-shaped head) at the shank end.
Applying torque with the wrench stretches the bolt shank and shears the shear nut (cup-shaped head).
When the preload reaches the calculated value, the shear groove breaks, causing the shear nut (cup-shaped head) to detach and completing the fastening process.
No additional preload measurement is required; installation compliance is directly determined by the "broken shank", eliminating human error.
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