These screw posts are made of heavy-duty, professional quality aluminum. They come in packages of 100 sets and are available in lengths of 1/8" to 4".
The Screw Post lengths listed below with each item are the minimum binding thickness of the book or the inside length of the screw. A 1/4" screwpost when tightened 100% will accommodate a 1/4" thick book or slightly larger if not tightened all the way.
All posts (or barrels) are 3/16" diameter, which fits comfortably in a standard 1/4" punched or drilled hole. The heads on the screws and posts/barrels are 7/16" in diameter and 1/16" thick - the thread pattern is 8/32. The heads can be tightened & secured using a standard 'flat blade' screwdriver.
Note: The 1/8", 3/16", 1/4" and 3/8" rear posts are open-ended. All other sizes have a closed back.
Sold ONLY in boxes of 100 sets each.
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