A cleat for an article of footwear comprising an insert made from a synthetic plastic material and a synthetic plastic traction member. The traction member is secured to the insert during a molding process, wherein the insert is made from a synthetic plastic material having a greater hardness than the traction member. The insert having a stem portion, an engagement means at a first end of the stem portion for releasable engagement with a complementary engagement formation defined on an undersole of the article of footwear and a securing formation extending from the stem portion for securing the traction member to the stem portion. Further, the cleat is formed in a single, economic injection molding process wherein the insert is formed from a plastic material which is of sufficient hardness to alleviate past problems experienced with stripping of a thread on the stem. The insert is formed of a synthetic plastic material having a hardness between 75 MPa and 85 MPa.