The Moroso butterfly-head quick fastener is a steel 5/16in shank with .400in length, available as a 10-pack for light assembly and trim work. With a butterfly head for compact retention, these fasteners are useful for securing panels, brackets, or small fabrications where a smaller diameter shank and low profile are preferred.
Moroso Quick Fastener - Butterfly Head - 5/16in x .400in - Steel - 10 Pack