The Moroso flush-head quick fastener is a steel 5/16in shank with .500in length, sold as a 10-pack for fastening thicker panels where a flush appearance is desired. The longer shank accommodates added material depth while the flush head keeps the finished surface low-profile, useful for trim, access panels, and light fabrication.
Moroso Quick Fastener - Flush Head - 5/16in x .500in - Steel - 10 Pack