1" Aluminum Screw Posts (Chicago Screws) 100 Pack



Chicago Screw Posts are a removable and quick way to secure loose sheets of paper together with a clean, finished appearance. With no special equipment or binding machine necessary, you can quickly bind samples, swatch books, pictures, and more.

These 1" aluminum screw posts come in two halves, and as the name suggests, one is a screw, and the other is the post. Once your materials are punched, slip them onto the long post side, and close the bind by rotating the screw end together. With a smooth exterior finish, you can change the contents without having to worry about scuffing.


  • Color: Silver
  • Usable Length: 1" Aluminum Screw Posts
  • Number of Pieces: 100 Screws & 100 Posts
  • Post Size: 3/16" (use a 3/16" or slightly larger hole in your documents)
  • End Size: 7/16" Diameter
  • Material: Metal (Aluminum) Screws & Posts

How to choose the correct size Screw Posts for Binding:

Stack the document or materials you will be binding, and measure the total thickness with a ruler. Find the closest size up from that measurement (if needed, pair an extension with a screw post to get the perfect length). If you have any questions about the best aluminum screw posts for you, call us at 1-866-455-9900 and we'll help you find exactly what you need!

SizeScrew & Post End TypesBind CapacityUsable Extensions
1/8"1 Side Slotted (Flat Head) / 1 Side HoleUp to 1/8"1/4" & 1/2" Extensions
3/16"Up to 3/16"
1/4"Up to 1/4"
3/8"Up to 3/8"1/4", 1/2", 3/4", & 1" Extensions
1/2"1 Side Slotted (Flat Head) / 1 Side SmoothUp to 1/2"
5/8"Up to 5/8"
3/4"Up to 3/4"
7/8"Up to 7/8"
1"Up to 1"
1-1/4"Up to 1-1/4"
1-1/2"Up to 1-1/2"
1-3/4"Up to 1-3/4"
2"Up to 2"
2-1/4"Up to 2-1/4"
2-1/2"Up to 2-1/2"
2-3/4"Up to 2-3/4"
3"Up to 3"
3-1/2"Up to 3-1/2"
4"Up to 4"
4-1/2"Up to 4-1/2"
5"Up to 5"