17/64" (7mm) Hole Size Head Diameter: 25/32" Stem Length: 15/64" Black Nylon Back Seat Shield Retainers Compare with: G.M. # 20319841, Auveco # 12731, Car Pak # 82-5543, 825543, Disco # 9374PK, 9374B, W&E # 3056, Barnes / Kar # CP825543, CP82-5543, Crest / Midwest # CRX122, Kent / Lawson # P81029, Winzer # 502.3229, Wurth # 150153071