Screw rivets, 11x11mm raw brass studs, chicago screw / concho screw, 1/8" bolt CSC8 2153-2030

Head Diameter = .43 (7/16") 11 mm
Barrel Diameter = .16 (5/32") 4 mm
Barrel Length = .31 (5/16") 8 mm
Screw = 1/8"
1 package = 10 screws

The other sizes and shapes like this

If you want any different design and dimension please convo me,

A Chicago screw, also known as a binding post or screw post, is a type of fastening and binding hardware used to secure and connect sheets of paper, leather, fabric, or other materials together. It consists of two threaded posts (male and female) with a screw-like design that allows them to be easily assembled and disassembled. Here's more information about Chicago screws:

**Components:**
- **Male Post:** This is a threaded cylindrical rod with a flat or slotted head. The male post is typically inserted through holes in the materials being bound together.

- **Female Post:** The female post is a threaded receptacle or tube with an opening at one end and threads on the inside. It's designed to receive the male post and create a secure connection.

**Common Uses:**
1. **Binding Documents:** Chicago screws are commonly used to bind documents, presentations, portfolios, and scrapbooks. They allow for easy disassembly and reassembly of the materials.

2. **Leathercraft:** In leatherworking and leathercraft, Chicago screws are used to attach belt buckles, wallet chains, and other leather accessories. They provide a durable and adjustable connection.

3. **Fabric and Apparel:** Chicago screws are sometimes used in clothing and fabric projects, such as attaching buttons, decorative embellishments, and securing layers of fabric.

4. **Art and Photo Albums:** Artists and photographers often use Chicago screws to create albums and portfolios with removable pages.

5. **Scrapbooking:** Crafters and scrapbook enthusiasts use Chicago screws to create customizable and expandable scrapbooks.

**Advantages of Chicago Screws:**
- **Ease of Assembly:** Chicago screws are simple to use. You can easily tighten and loosen them using basic tools like a screwdriver or a coin.

- **Reusability:** Unlike some binding methods, Chicago screws can be reused multiple times. This makes them suitable for frequently updated documents or projects.

- **Adjustability:** Chicago screws allow for the adjustment of the bound materials' thickness. You can add or remove pages without the need for special tools.

- **Durability:** When properly tightened, Chicago screws create a secure and durable connection, making them suitable for long-lasting projects.

- **Professional Appearance:** Chicago screws provide a clean and professional appearance to bound documents and projects.

**Variations:**
- **Material:** Chicago screws are available in various materials, including brass, aluminum, stainless steel, and plastic. The choice of material depends on the intended use and aesthetic preferences.

- **Sizes:** Chicago screws come in different lengths and diameters to accommodate various binding needs. Ensure that you select the appropriate size for your project.

Chicago screws are versatile fasteners commonly used in binding, securing, and connecting various materials. Whether you're binding documents, creating leather accessories, or working on craft projects, Chicago screws provide a reliable and flexible solution.