Fastener and driving tool

作者： David Byron , Marvin Bassell , Robert J. Catanzaro

DOI:

关键词: Bit (horse) 、 Engineering 、 Structural engineering 、 Mechanical engineering 、 Interlock 、 Fastener 、 Head (vessel) 、 Perpendicular 、 Tool bit

摘要: A fastening system comprises a driving tool formed with rectangular-shaped bit at its end, and fastener such as screw whose head is recess defining central slot four spaced undercuts each having parallel upper lower walls side wall perpendicular thereto. The of the inserted within then rotated that edges rectangular contact two undercuts, top bottom surface frictionally engages undercuts. Frictional engagement between provides positive, temporary interlock therebetween, permits transfer torque over large to reduce wear.