A THREAD FORMING TOOL WITH ANNULAR RIDGE

摘要

A thread forming tool comprises an elongated body (4), having at a first end (6) a connector portion (8) and at a second end (10) a thread forming portion (12), said thread forming portion (12) comprising at least one annular ridge (14) about the circumference of said body. According to the invention, the cross-section of said body at the centre of said ridge has a non-circular shape.