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Tunnel & Bridge Fastenings
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SPEAR BOTS & SOCKETS
Spear bolts and the accompanying cast-in sockets fulfill the same function as curved bolts
(permanently fix tunnel segments)whilst being easier to install.
A major advantage of the spear bolt is that following installation only one pocket per bolt requires finishing.
They are used to enable efficient erection of tunnel segments
COMPLETE RANGE AMAILABLE
HuiBo Railway manufacture a complete range of spear bolts and sockets from M16 to M30 diameter
Lengths can be made to suit customers requirement
We encourage enquiries and drawings for Custmization of bolts and fittings.
STRENGTH GRADES
Both mild steel 4.6 and high tensile 8.8 grades are availabla
Other grades available upon application
FINISHES
Spear boltscan be supplied in galvanised and sherardised as standard finishes
0ther finishes available to suit customer requirements
Pull out data for plastic sockets isavailable upon request

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CURVEDTUNNEL BOLTS
Curved bolts are used to permanently Fix tunnel segments together through a radius hole, They can
be used in both radial and circumferential joints.
COMPLETE RANGE AVAILABLE
HuiBo Railway manufacture a complete range of curved tunnel bolts from M16 to M30 diameters.
Lengths and radius can be made to suit customers requirements.
We encourage enquiries and drawings for Customization of bolts and fittings.
STRENGTH GRADE
Both mild steel 4.6 and high tensile 8.8 grades are available .
Other grades available upon application.
FINISHES
Curved tunnel bolts can be supplied in galvanised and sherardised as standard finishes .
Other finishes available to suit customer requirement.

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ANCHOR BOLT
Our Anchors are Complete systems including anchor,nuts,helical spring washers
sockets,ferrules and resin.Designed to meet exacting performance,all our anchor
systems are tested to internationally recognized standards.
It has two systems : Fixed Anchor System and Removable Anchor System separately .
The dia available in M22,M24,M27 with lengths to suit any applications.

Bridge Bolt ( High Strength Bolt)
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Size
M16-M30 / 1/2" -1-1/4"
Length 50mm-300mm / 2"-10"
Grade 10.9/ 10.9S / 12.9
Standard Refers GB, DIN, ISO, ANSI/ASTM,B7, BS, JIS etc
Raw Material 20MnTiB,ML20MnTiB,35VB, 35CrMo,40Cr.etc
Surface Black, HDG etc
Applications Steel structures,multi-floor,high-rise steel structure, buildings,industrial buildings,high-way,railway,steel steam,tower,power station,and other structure workshop frames

High Strength Bolt ,Bridge Bolt
  • \They are Made of high strength steel, or to impose larger pretightening force of bolt, all known for the high strength bolts. High strength bolts used for bridges, rail, high voltage and ultra high pressure equipment connection.The bolt fracture is brittle fracture,In the application of ultra high pressure equipment of high strength bolt ,or in order to keep the container sealed and need to impose greater prestress.
    High strength bolt connection has the advantages of simple construction, by the good mechanics performance, removable, fatigue resistance, and under the action of dynamic load by loosening the advantages is very promising connection method.
    HuiBo Railway has been in this High Strength Bolt production field for 15 years ,supplied the bridge construction ,Railway constructions etc , we monthly produced and shippedsuch high strength bolts at home or abroad .
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