Finish / Material: Solid brass
 Origin: Made in Italy
 Size: Head diameter 9 mm; stem (post) length 5 mm.
 
🔩 What It Is — How Chicago Screws Work

• A “Chicago screw” (also sometimes called a screw‑post or binding post) is a two‑part fastener: a barrel (post) and a matching screw. The barrel passes through the material(s), and the screw threads into it from the back — clamping the layers together securely.
• Because it’s screw‑based (not a rivet), it can be unscrewed and reused. This makes it ideal when you want joints that can be disassembled, adjusted or replaced — for example belts, straps, modular leather goods, or adjustable assemblies.
• Installation generally involves punching or drilling a hole through your material, inserting the barrel, then screwing in the post.

 
✅ Key Features & Benefits of This Screw

• Solid brass construction: Brass is durable and resists corrosion, which helps the screw maintain integrity and appearance over time — useful for items exposed to wear, moisture or regular use.
• Compact size (9 mm × 5 mm): The relatively small head diameter and short stem make this screw suitable for light‑ to medium‑thickness materials — leather, webbing, or layered fabrics used in belts, straps, bags, or similar items.
• Neat, clean finish: Because both head and screw lie flat once installed, you get a flush, tidy appearance — a more professional look than makeshift stitching or bulky rivets.
• Reusable & adjustable: Great for projects where you might want to replace parts (e.g. swap a belt buckle), adjust straps, or disassemble for maintenance or repair — flexibility that permanent rivets don’t provide.
• Ease of installation: No heavy-duty rivet-setting tools needed — typically a hole punch, screwdriver (or similar), and sometimes a mallet is enough.

 
🎯 Typical Uses & Applications
This small brass Chicago screw is especially well-suited to:

• Leatherwork: belts, wrist straps, bags, pouches, harnesses — especially where you want to allow for future changes (e.g. interchangeable buckles or adjustable straps).
• Modular assemblies: items composed of multiple layers or parts that might need to be disassembled or adjusted (e.g. bag flaps, adjustable webbing, removable panels).
• Repairs or upgrades: replacing worn parts, re‑configuring designs, or upgrading components without full rebuilds.
• Craft, hobby, or custom projects: bookbinding, decorative leather goods, custom DIY accessories — wherever a secure yet semi‑permanent fastening is useful.

Please note, size refers to the diameter of the head followed by the length of the stem.