MUSHROOM-COMPACTION AND ASYMMETRIC-THREAD IMPACT-DRIVABLE SCREW

摘要

An asymmetric thread impact drivable screw (300) and clip (100) for use with a power impact device for penetrating wood fibers while minimizing cut fibers. The screw includes an impact head (310) and a conical shaped tip (330) having a ballistic insertion angle (332) at the ends of a shank (340). The shank defines asymmetrical threads with an insertion flank having a long side at a slide angle peaking at a crest (368) supported by a catch flank (372) positioned at a grip angle (374). Varying tool accepting recesses are taught for the head along with multiple thread sections. A mushroom compaction thread section is also taught.