UNAHH3-15Hexagon Socket Stopper Bolt / Stopper Bolt with Bumper 3x21x7.5mm Stock Qty.: 3500.pcs (More on the Way) UNAHH3-15 BoltSpecifications Model NumberUNAHH3-15 TypeStopper Bolt MaterialUrethane (Stopper) ; SCM435 (Screw) HardnessShore A70 (Stopper) ; 10.9 (Screw) ...