1/4" (6.40mm) Hole Size Stem Length: 20mm Head Diameter: 18mm Black Nylon Trim Panel Retainer Compare With: Honda # 90667-SAO-0030, 90667SAO0030, Nissan # 76996-01P02, 7699601P02, Auveco # 16776, Disco # 12453PK, 12453B, Crest Midwest # CRX4040