carbon steel 4.8 5.8 M2 - M10 Full Thread Square Head Screw Bolt

carbon steel 4.8 5.8 M2 - M10 Full Thread Square Head Screw Bolt

Description

Square head bolts are divided into 4.8 class bolts, 8.8 class bolts, 10.9 class bolts and 12.9 class bolts according to the grade of high strength.It is widely used in the electrical and electronic industry, water conservancy engineering industry, electrical products, mechanical equipment, chemical equipment, ships, vehicles, steel structures and so on.

It is distinguished from other bolts by its shallow mushroom head and that the shank cross-section of the bolt is circular for most of its length, but the portion immediately beneath the head is formed into a square section.Carriage bolts are designed to sink into the wood as you tighten the nut, essentially creating their own pockets. Except you're building with very hard wood, this should work fine.Carriage bolt is designed to sink into the wood as you tighten with nut, essentially creating their own pockets. Unless you're building with very hard wood, this should work fine. You can tap the bolts inward with a hammer as you tighten the nuts to assist.Carriage bolts are designed so that on one side of an assembly that there are no protruding bits for things to catch on. The round head part will provide that as opposed to there being a hex or square head sticking out. In your case with a chair kit the general idea is that the heads of the carriage bolts should face toward the side of the chair where the user will be. As such the threaded bolt ends will want to be down underneath or toward a generally non use for surface of the chair.

Specification

Application

A carriage bolt, coach bolt or round head square neck bolt is one type of bolt used to fasten metal to wood.And used in wood connections utilizing the square neck under the round head which will sit into the hole to prevent the head from turning.

How to use

The design of carriage bolts allows you to install the fastener without a helping hand. Below the half-round head of a carriage bolt sits a squared shoulder. First you drill a hole through material sized for the bolt, the head of the bolt will keep in place while you tighten the fastener onto the material. Use a hole too large for the bolt will result in the bolt head spinning in the material. This will not allow the carriage bolt to tighten in the material.

More pictures

Advantage

Jiaxing Haina Fastener co. Ltd was established in 2010, located in the hometown of fasteners jiaxing city. For many years of export experience, our products has been best-selling in Europe, the United States, the Middle East and Southeast Asia. The products are manufactured by more functions machine, which is brought in domestic and foreign well-known enterprises. The products made are fully compatible with the international standards, well received by domestic and foreign customers. Through scientific management, Jiaxing Haina fastener Ltd company has been obtained ISO9000 certificate of Quality Managerment System, SGS and BV international certificate system of Make in China.

Product standards including DIN, ISO, GB and ASME/ANSI, BS, JIS AS. Main levels of carbon steel: 4.8, 4.8, 6.8, 8.8, 10.9, and 12.9 grade, the main material of stainless steel SS201, SS304, SS316 and various kinds of special stainless steel.

The width range of our products can be divided into auto fasteners, mechanical fasteners, construction fasteners, power fasteners, railway fasteners, household electrical appliances fasteners and chemical fasteners,

We have first-class service team, so we can meet the different requests for a set of customers. We solemnly commitment, first-grade quality, timely delivery guaranteed

Reasonable price and service paramount, forward to the operation principle of quality first and customer first, pursuit of excellence to create first-class brand, our aim is brand promoting development, management promoting earnings, warmly greeting home and abroad new and old customers to communicate and cooperate to seek greater success and brilliant future.