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Welcome to
Asia Bolts & Nuts


Our objective
is to manufacture and supply Quality fastener Products to meet the ever changing needs of the market with reliable and efficient after sales, Technical Support with the assurance of the best quality manufactured fastener products and services.

We specialize in Cast-in anchors, Hex socket cap and set screws, High Quality tension control bolting, ASTM A193 Grade B7 stud bolts, Expansion bolts.

Chemical anchors and studs F10T High Strength Friction Grip bolts, nuts and fasteners ASTM A325 high strength Structural bolts and nuts.

We can manufacture standard bolts Hot forging up to the following dimension: Diameter up to 64 mm or 2.5 inches Length up to 1 meter In accordance with the international standard such as ISO, DIN BS, ASTM, JIS, ANSI and special requirements by our manufacturing process.

Our fasteners, Quality bolts, nuts is at competitive prices to meet the satisfaction of our Valued customers and in an environment where Our Employees are valued, respected and highly motivated, bonded by long-term relationship with our trade associates.

 The Fastener Specialist 
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The Fastener Specialist - Asia Bolts & Nuts Manufacturer of bolts and nuts, fasteners for export

Glossary of terminology on topics related to nuts and bolts, threaded fasteners and tightening techniques.

The effective cross sectional area of a thread when subjected to a tensile force. It is based upon a diameter which is the mean of the pitch (or effective) and the minor (or root) diameters of the thread.

The use of this diameter stems from the work of E. M. Slaughter in the 1930's. He completed carefully controlled tests using various sizes of standard threads and compared their strength with machined bars made from the same bar of material.

He found that this mean diameter gave results that agreed with the tensile test results to within about 3%. The error on the minor and pitch diameters was about 15%. Tests completed subsequent to these by other investigators have also shown that the stress diameter is a reasonable approximation to a thread's tensile strength.



It is a thread form that has been modified to resist vibration loosening. The thread has several horizontal portions (i.e. no lead angle) whose purpose is to prevent torsion being developed in the bolt as a result of the loosening purpose.

It is these horizontal portions that are known as steps. Published literature indicates that the thread form performs well when tested on a transverse vibration test machine. However manufacturing difficulties may prevent its widespread adoption.


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