Nylon Retainers System of Measurement Metric Shank Diameter 8.5 mm Overall Length 23 mm Shank Type Keyhole Material Nylon Head Type Dome Head Height 1 mm Head Diameter 17 mm Color Black Maximum Hole Diameter 8.5 mm Maximum Material Thickness 7 mm Product Type Push-In Rivet Minimum Material Thickness 4.5 mm Manufacturer Location Made in USA Body Length 22 mm Material Grade/Class Ungraded Package Quantity 25