1-1/2" Black 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 1-1/2" 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: Black
  • Usable Length: 1-1/2" 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"