Flat head Chicago screw

Cold heading process is one of the new processes for pressure machining of less or no cutting
metal. It is a processing method that utilizes the plastic deformation of metal under the action of
external forces, and with the aid of molds, redistributes and transfers the volume of metal to form
the required parts or blanks. The cold heading process is most suitable for producing standard
fasteners such as bolts, screws, nuts, rivets, and pins.etc

Flat Head Chicago screw, also known as sex bolts, binding posts, or barrel nuts, are two-part fasteners consisting of a male screw and a female barrel. They are commonly used in leatherworking, bookbinding, and other applications where a flush, low-profile connection is needed.

Features of Flat Head Chicago Screw:

1. Flat Head Design – The screw has a countersunk flat head that sits flush with the surface when installed.

2. Threaded Barrel (Female Part) – The barrel nut has internal threads that accept the male screw.

3. No External Threads Visible – Once assembled, the screw threads are hidden inside the barrel, providing a clean finish.

4. Secure Fastening – They provide a strong, permanent or semi-permanent hold, often requiring a tool (like a screwdriver or spanner wrench) for disassembly.

5. Variety of Materials – Available in stainless steel, brass, aluminum, and steel, with options for plating (nickel, black oxide, etc.).

6. Multiple Sizes – Come in different lengths and diameters (e.g., #6-32, #8-32, #10-24, 1/4″-20, etc.).

Common Uses:

• Leathercraft (belts, holsters, straps)

• Bookbinding (removable covers, portfolios)

• Furniture assembly

• Signage & displays

• Military & tactical gear (where rivets aren’t suitable)

Advantages:

• Reusable – Can be unscrewed and reassembled.

• Flush Finish – No protruding parts.

• Stronger than rivets – Allows for disassembly without damage.