Mushroom Head Square Bolts

Mushroom Head Square Bolts is a specialized fastener with a unique head design resembling the cap of a mushroom. It plays a significant role in fields such as furniture manufacturing and vehicle engineering.

The definition of the Mushroom Head Square Bolts is quite straightforward. Its wide and rounded head design not only increases the contact area but also more effectively disperses pressure and resists pull-through force. At the same time, it can form a smooth and flat decorative appearance.

The main product forms of it can be divided into the following categories:

Carriage Bolt: The lower part of the head has a square neck. When installed, it can self-engage into the wood to resist rotation during tightening, and it is a classic design for single-side installation.

Furniture Connector Bolt: The head usually has an internal hexagonal or star-shaped driving groove, specifically designed to be used in conjunction with other connecting pieces to assemble flat-pack furniture. It features both aesthetic appeal and ease of disassembly.

Clamp Bolt: The head has a structure similar to a handle, allowing for quick tightening or loosening by hand without the need for tools. It is particularly suitable for applications where frequent clamping is required.

Customized service

The custom service for Mushroom Head Square Bolts is highly flexible. Almost all key parameters can be adjusted as per your requirements. From basic dimensions and materials, to the neck structure and surface treatment, all can be precisely manufactured according to your drawings or samples.

（1）Customized size specifications

Nominal diameter (thread diameter): M2 to M100 or larger. For furniture, it is mostly M6 to M10; for heavy industry, it is M16 to M100.

Length (total length / rod length): 3mm to 5 meters or longer.

Thread length: Full thread / Partial thread

Thread specifications: Metric coarse thread/finely threaded, British UNC/UNF, American, custom tooth profile

（2）Material selection

Carbon steel: Suitable for indoor use and general industry, with the highest cost-performance ratio

Alloy steel: High strength and fatigue resistance, used in heavy machinery, car chassis, and wind power

Stainless steel: 304 for rust prevention; 316 for seawater and chemical resistance

Special materials: Brass, titanium alloy, aluminum alloy, nickel-based alloy, with properties such as conductivity, light weight, and high temperature resistance, etc. Applications include explosion-proof, aviation, medical, and lightweighting.

（3）Customization of head and neck structure

Head shape: Large semi-round head, flat round head, flat-top round head, thin head

Drive type (slot type): Straight, cross, hexagon (Hex), star (Torx), diamond (Pozidriv)

The anti-rotation structure at the neck of the Mushroom Head Square Bolts: Square neck (standard), ribbed neck, ribbed/raised point neck, smooth rod without neck

Head marking: Brand logo, strength grade (such as 8.8), size identification

（4）Surface treatment customization

Choose the appropriate surface treatment based on the usage environment, and consider whether there is a need for corrosion prevention.

（5）Performance level customization

Make the selection based on the applicable scenarios of the product.