Patent ID: 7966705

Claim:
A fastening system for inserting and setting a self piercing blind fastener in a workpiece formed of a plurality of metal sheets, said system comprising: a die for supporting the rear of a workpiece during insertion of said fastener; a combined insertion and setting tool, which combined insertion and setting tool comprising a force application mechanism and an insertion member for engaging a shell of said blind fastener and for transmitting an insertion force thereto, a mandrel engaging member for engaging a mandrel stem of said fastener, said mandrel engaging member being displaceable relative to said insertion member for effecting relative displacement of said mandrel and said shell to effect setting of said blind rivet; and a displacement mechanism for effecting relative displacement of said die and said combined insertion and setting tool, wherein the die for supporting a workpiece comprises a selectively engageable workpiece engaging support member having a cylindrical fastener receiving bore extending therethrough, said bore having a generally uniform mid section of constant diameter and a throat portion adjacent an outer surface of said support member, which throat portion increases in diameter towards said outer surface.