Product Introduction

Brass alloy hexagonal positioning column accessories

We will introduce the issue of hexagonal positioning bolts (detailed introduction of hexagonal bolt model parameters in the picture). The following is a summary and organization of this issue by Fastener Editor. Let's take a look.

Standard for hexagonal head bolts

Hexagonal head bolt standard: National standard GB/T5785-2001 for hexagonal head bolts. Scope: This standard specifies the thread specifications of M8 * 1~M64 * 4, fine thread, performance grades of 5.6, 8.8, 9.8, 10.9, A2-70, A4-70, A2-50, A4-50, CU2, CU3, and AL4, and product grades of A and B for hexagonal head bolts, marked as GB/T70 M3x length. The same M6 is labeled as: screw GB/T70.1 M6x length. Note that this length includes the length of the screw head. Simply stating the concept of M8 bolts is vague. The bolts that people often refer to are generally hexagonal head bolts, and there are also many types. For example, this is the most commonly used.

Detailed introduction to the model parameters of hexagonal bolts

There are also specialized bolts for welding, with threads on one end and no threads on the other end, which can be welded onto the parts while directly tightening the nuts on the other side. Hexagonal bolts are divided into two types: outer hexagon and inner hexagon. Because inner hexagon bolts are used more discreetly and occupy less space, they are more commonly used than outer hexagon bolts. The specifications of hexagonal bolts are far more than those mentioned above

Introduction to the price of hexagonal bolts

Their prices in the market also vary greatly, such as 304 external hexagonal screws/bolts made of stainless steel, with models of M8,12mm, priced at 5 cents each; The price for the same variety of model M8150mm is 2.7 yuan per unit. For hexagonal bolts, some of them have partial threads

What is the national standard for hexagonal bolts?

The national standard for hexagon socket bolts is as follows: GB70-76 is named as: cylindrical head hexagon socket screw, commonly known as the old standard, and GB70.1-2000 is named as: hexagon socket head screw, commonly known as the new standard, which is an alternative standard introduced on the basis of the 76 standard. There is a slight difference in the diameter of the cylindrical head and the size of the inner hexagon between the two standards, except for a few specifications

Internal hexagonal bolt standard National standard for internal hexagonal bolts

The national standard for hexagon socket bolts GB/T2-1985 is the standard for fasteners with external threads. The end (eqvISO4753:1983) GB/T90-1985 is the acceptance inspection, marking, and packaging of fasteners (eqvISO3269:1984) GB/T196-1981 is the standard for ordinary threads, with basic dimensions (diameter 1~600mm) GB/T197-1981 is the standard for common thread tolerances and fits (hexagon socket flat end set screws, also known as machine screws, have a flat head and tail end and a hexagonal shape inside. Below, the editor recommends several manufacturers of hexagon socket flat end set screws. The manufacturers recommend Qinhuangdao Zhongwei Precision Machinery Co., Ltd. The above is The editor has provided a detailed introduction to the model parameters of hexagonal positioning screws and hexagonal bolts, as well as answers to related questions. We hope it will be helpful to you.

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