5/16" (8mm) Hole Size Stem Length: Head Diameter: 13mm Gray Nylon Door Trim Panel Retainers Compare With: G.M. # 11610605, Auveco # 21488, Disco # 12844PK, 12844B, Car-Pak # 99-8932, 998932, Crest Midwest # CRX20489, Lawson # 1118786, Winzer # 502.8932, Wurth # 150121488, Kimball / Midwest # 13480