225/64" (10mm) Hole Size Stem Length: 35/64" Head Size: 17/32" x 15/32" Black Nylon With Sealer Fender Flare Moulding Retainer Compare with: G.M. # 10300287, 10442914, Car Pak # 99-8267, 998267, Crest / Midwest # CRX17790, Disco # 11850PK, 11850B, Kent / Lawson # P85359, Winzer # 501.8833, S&R # 421003