What are 12 point bolts called?
The 12-Point Bolts, also known as a 12-Point Flange Head Cap Screw or a ferry bolt, has a flange diameter and head thickness that are identical to those of a socket head cap screw. As a result, it can be used in any application that calls for a socket head cap screw. Since this screw has a 12-point bolt head, it may be tightened with a 12-point socket wrench, allowing for larger torques to be applied than with a typical internal hex drive socket head cap screw. Additional advantages over a conventional hex head cap screw are provided by this feature in conjunction with the increased bearing area under the head of the flange design.
12 Point Bolt specifications and dimensions
12 point flange bolt suppliers in UAE
What is a 12 point bolt head?
Hex socket cap screws can also have 12-Point Bolts as an alternative head style. A variety of applications can be accommodated by the flange diameter and head height, which also have counterbored holes made for common hex socket cap screws. This form of the bolt may be tightened using a 12-Point socket wrench because of the 12-Point design, which enables greater torque to be delivered than with a typical interior hex drive socket head cap screw.
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What are 12 point bolts used for?
The hex socket won’t round over as it does with regular hex sockets thanks to the 12-point design, which also allows for additional torque to be given to the bolt. The head dimensions of a socket head cap screw are the same as the flange diameter and head thickness of the 12 Point Flange Bolt. This makes it possible for any application that now uses a socket head cap screw to be switched out with a twelve-point flange bolt. In contrast to a typical internal hex drive socket head cap screw, the twelve-point design of this form of bolt enables it to be tightened with a twelve-point socket wrench, which allows for a higher torque to be delivered.
12 point fastener for 1/4″ to 1 1/2″ sizes, also check the 12 pt bolt torque chart
What is the torque loading of a 12 point flange bolt?
Hydraulic bolt torquing is advised when the bolt loading necessitates applying a torque greater than 678 Nm (500 ft-lbs). A torque wrench is used to torque-tighten flange joints (Manual or hydronic wrench). More than 75% of the proof load of the fastener is produced during tightening or the clamp load. The screw’s clamping force must be greater than the load that would cause the joint to separate to reap the benefits of pre-loading. The amount of torque required depends on the amount of friction that exists between both the stud bolt threads as well as the nut head. This friction can be reduced by lubricating the stud threads or by plating them with metals like cadmium or zinc.
Check applications, dimensions and specifications of 12 point metric, chrome and arp bolts
Applications of 12 point fastener
The 12-point bolts are frequently utilized for a somewhat higher clamp load. The bearing surface of a 12-point bolt is equivalent to that of a cap screw with a hex head of a similar size. Except for the top of the head, there isn’t much distinction between the two when it comes to wrenching. Due to the bolt’s receding head, a 12-point bolt is frequently used in the oil and gas sector. When they clamp the end bolts together, this won’t be visible. Additionally common in engine applications are 12-point bolts. A 12-point will help deliver because the clamp load for engine applications is often higher than most others.
View advantages of twelve point bolt and 12 sided bolt head as per ISO 4017, GB5783 and DIN 931 standard
Advantages of 12 point aircraft bolts
The 12-Point design enables this form of the bolt to be tightened securely with a 12-Point socket wrench, which enables a larger torque to be applied in comparison to a typical internal hex drive socket head cap screw. This is made possible by the 12-Point design. One other benefit associated with the 12-Point head type is its adaptability to use in confined locations.
