Iron nickel plated hexagonal three combination screw with cross groove recess hexagonal head combination bolt M3/M4/M5/M6/M8

Characteristics of combination Screws

A combination screw is a bolt, also known as a bolt with an additional dodecahedron at the end. The main feature of these combination screws is that they are all equipped with corresponding washers, making them very convenient to use. Its biggest advantage is that it saves time and eliminates the need for manual assembly of flat pads, making production line operations convenient and efficient, and improving work efficiency.

The purpose of combination screws

Combination screws are mainly used in railway and highway bridges, boiler steel structures, industrial plants, high-rise civil buildings, tower and mast structures, lifting machinery and their steel structures where friction type high-strength bolt combination screws are required.

Types of combination screws

There are generally four types of combination screws:

1. Pan head combination screws are divided into large and small pan head combination screws.

2. External hexagonal combination screws are divided into those with cross grooves and those without cross grooves.

3. Internal hexagon combination screw.

4. Four sided pressure line two combination screw.