China Screw Manufacturers, Suppliers, Factory

Every Carriage Bolt and Nut embodies advanced manufacturing processes and strict quality control. We use high-quality steel raw materials to ensure the strength and durability of our products from the source. During the production process, we use precise cold heading and hot forging techniques to shape and size bolts and nuts accurately. Advanced heat treatment technology also endows our products with excellent hardness and toughness.

The hexagonal tip set screw belongs to headless fasteners, and its core structure consists of a fully threaded rod body, an hexagonal drive groove, and a conical tip. The conical tip design can achieve point contact compression, which can generate greater stress relief under the same preload compared to flat or cylindrical end set screws, significantly improving anti loosening performance.

The iconic design of Wing Nuts And Bolts lies in its unique butterfly shaped structure, with wing like protrusions extending from both sides of the head, resembling butterfly wings. This design overturns the traditional mode of nuts relying solely on tools for fastening, allowing users to quickly tighten or disassemble without the need for wrenches, sockets, or other tools, with high efficiency.

Grade 8.8 hexagonal bolts are made of high-quality carbon steel and undergo heat treatment to achieve a tensile strength of 800MPa and a yield strength of 640MPa, meeting the requirements of medium and high load scenarios. The nuts and washers are made of the same material or high elastic alloy steel to ensure long-lasting and stable locking force. The product is provided as a three piece set of "bolt+nut+flat washer" for driving.

The design of the Cross Pan Head Square Wash Bolt is exquisite, and its head shape is not only beautiful and generous, but also provides a comfortable point of contact during assembly, making it convenient for operators to tighten and greatly improving assembly efficiency. The design of the square pad is a major highlight of this screw. The square pad can provide a larger support area, effectively dispersing and avoiding damage to the surface of the connected part due to excessive pressure.

The Nylok Dome Head Screws features a precision machined circular tooth pattern at the bottom of the semi-circular head, which forms a physical locking structure after installation to resist lateral shear forces. It adopts imported anti drop coating technology, and the adhesive layer penetrates the thread micro gap under pre tightening force, forming a tough bonding layer after curing to resist axial vibration. The depth of the inner hexagonal drive groove is optimized to ensure that the tool fits well with the screw head.