Fastener system with stabilizer ribs

A fastener system comprising:

• a fastener comprising:
• a central recess core having a bottom region;
• a plurality of wings radiating outwardly from the central recess core, the wings each being defined by a pair of recess sidewalls and a recess outer transition surface adjoining the recess sidewalls, the recess outer transition surface extending from a top of the recess and connected to the bottom region and forming a bottom region transition edge at the intersection of the bottom region and the outer transition surface;
• at least one recess inner transition surface connecting a recess sidewall of a first wing to a recess sidewall of a second wing, the first and second wings being adjacent to each other;
• a groove in the inner transition surface extending in a radially outward direction from the inner transition surface, the groove extending from a first distance from the bottom region transition edge to a second distance from the bottom region transition edge, the first distance being non zero.
• a driver for engaging the recess of the fastener, the driver comprising:
• a shank portion and a recess-engaging portion formed at an end of the shank portion, the recess-engaging portion comprising a central driver core having an end region and a plurality of lobes radiating outwardly from the driver central core, each lobe being defined by a pair of driver sidewalls and a driver outer transition surface adjoining the driver sidewalls, the driver outer transition surface extending from the shank portion and connected to the end region and forming an end region outer transition edge at the intersection with the driver end region;
• at least one driver inner transition surface connecting a driver sidewall of a first lobe to a driver sidewall of a second lobe, the first and second lobes being adjacent to each other;
• and
• a stabilizing rib on the driver inner transition surface extending in a radially outward direction from the driver central core, the stabilizing rib extending from a first distance from end region outer transition edge to a second distance from the end region outer transition edge, the first distance being non-zero.

A method of forming a threaded fastener having a driver-engageable recess formed at an end thereof, the method comprising:

• using a punch to form the recess, the punch including:
• a central core having a bottom forming portion;
• a plurality of wing forming portions radiating outwardly from the central core, the wing forming portions each being defined by a pair of sidewall forming portions and an outer transition surface forming portion adjoining the sidewall forming portions, the outer transition surface forming portion connected to the bottom region forming portion and forming a bottom region transition edge forming portion at the intersection of the bottom region forming portion and the outer transition surface forming portion;
• at least one inner transition surface forming portion connecting a sidewall forming portion of a first wing forming portion to a sidewall of a second wing forming portion, the first and second wing forming portions being adjacent to each other;
• a groove forming portion in the inner transition surface forming portion extending in a radially outward direction from the inner transition surface forming portion, the groove forming extending from a first distance from the bottom region transition edge forming portion to a second distance from the bottom region transition edge forming portion, the first distance being non zero.