Fastener having recess useable with multiple drivers and method of manufacture

Abstract

A fastener is described having a head formed with a recess which accommodates a square head driver, symmetrical drivers, such as PHILLIPS™ style drivers, asymmetrical style cross head drivers, such as POZIDRIV® style drivers, and combination square and cross drivers without compromising performance of the drivers.

1 - 19 . (canceled)  
   
   
       20 . A driver for engaging a recess in the head of a fastener in torque transmitting relation having an engagement portion extending from a shank to a tip a first distance, said engagement portion of said driver comprising: 
 a cross winged portion extending said first distance from said shank to said tip having an overall cross wing outer profile, said wings being formed by adjacent walls, wherein said adjacent walls converge, from said shank to said tip, symmetrically at an included angle according to the standard for type Ia fasteners; and    a square portion, having an overall square outer profile, extending a second distance, that is less than said first distance, wherein said overall square outer profile is within said overall cross wing outer profile.    
   
   
       21 . A driver for engaging a recess in the head of a fastener in torque transmitting relation having an engagement portion extending from a shank to a tip a first distance, said engagement portion of said driver, as described in  claim 20 , wherein said square portion is formed by four walls extending at right angles to each other and having exposed sections extending between said adjacent walls of said wings.  
   
   
       22 . A driver for engaging a recess in the head of a fastener in torque transmitting relation having an engagement portion extending from a shank to a tip a first distance, said engagement portion of said driver, as described in  claim 20  wherein said included angle is 2.5 degrees.  
   
   
       23 . A driver for engaging a recess in the head of a fastener in torque transmitting relation having an engagement portion extending from a shank to a tip a first distance, said engagement portion of said driver, as described in  claim 20 , wherein said opposing walls are each inclined at an angle of 1.25 degrees to the vertical to cause said convergence.