1/4 in. Aluminum Screw Posts/Chicago Screws (Qty 100 sets)
Also referred to as "Chicago Screw Posts" & "Chicago Screws", our Aluminum screw post binding posts are a great choice for swatch books, architectural and engineering drawings, or any application where loose sheets need to be kept together.  * Diameter (outside post): 3/16" * Diameter (outside screw head): 7/16" * Recommended hole size: 1/4-5/16" * Post is threaded all the way through * Screw Head: 1/16" (A top & bottom head will add an additional 1/8" to post length)