Mushroom Head Square Neck Bolts

Mushroom head square neck bolts are used to join objects to play a role in fixing, it is also called carriage bolts.This square neck bolt has a special head, it is a round head with a square neck, which is applied in the groove, and its square neck can be stuck in the groove to prevent the bolt from rotating, and the mushroom head square neck bolts can be moved parallel to the groove.

Customer concerns

1.About guaranteeing the mushroom head square neck bolts quality

We are the manufacture with more than 10 years production experience;And Our raw materials have stable properties,and our production machines are all high -precision and high -speed multi-type,which are using the most advanced equipment at home and abroad.We have fifty technical personnel and they test products every procedure.We have passed the ISO 9001: 2015 Certificate.

2. About the relevant documentation

Yes, we can provide most documentation including Certificates of Analysis/Conformance; Insurance; Origin, and other export documents you required.

3.About the leading time

For samples, the leading time is about 7 days.Mass production, the leading time is 20-30 days after receiving the deposit .

Advantages

The round head design of mushroom head square neck bolts provides a larger pressure-bearing area, which better distributes the pressure when tightening the bolts and avoids damage by over-compressing the surface of the connected part. At the same time, the square neck of mushroom head square neck bolts prevents the bolt from rotating in the mounting holes of the connected part,which makes the connection more stable,especially for the connection parts that need to withstand large shear and tension forces.

The rounded head of mushroom head square neck bolts is smooth and has no sharp edges, making it less likely to cut the operator's hands during installation or cause damage to surrounding components or materials.And its shape facilitates the use of various tools for tightening operations,such as wrenches, etc.which can improve the installation efficiency.

What we can offer

1) Effective OEM & ODM service.

2) Good quality control.

3) Highly competitive prices.

4) Professional technical team.

5) Smooth communication.

6) Good solutions from design, manufacturing, packing, to logistics delivery.

We are devoting ourselves to developing products for customers’ requirements and establishing a long-term business relations with our esteemed customers. Xiaoguo® is a professional nut manufacturer. It produces not only mushroom head square neck bolts, but also a variety of screws and nuts. Welcome to consult for more products.

Product surface treatment

Mushroom Head Square Neck Bolts use different surface treatments based on where they’ll be used, mostly to prevent rust and make them last longer. The most common one is electro-galvanization. It adds a thin zinc layer on the surface, which works for indoor environments or places with little moisture, like regular machinery assembly or furniture building. Hot-dip galvanization is another choice. It has a thicker zinc coating, so it’s more resistant to corrosion. This type is often used for outdoor stuff, such as agricultural machinery, construction fences, and outdoor equipment that gets exposed to rain and humidity. There’s also black oxide treatment. It forms a black oxide film on the surface to make the bolts more wear-resistant, suitable for mechanical parts that need to be put together and taken apart frequently. For corrosive environments like marine or chemical areas, stainless steel versions may go through passivation treatment to boost corrosion resistance further. All these surface treatments follow basic industrial standards to make sure the coating sticks well and doesn’t peel off easily during installation and use.