Cylindrical Vibration Isolator Vibration Isolator Style Two Tapped Holes Maximum Load Downward Compression 55 lbf Overall Diameter 1 in Height 1 in Maximum Load Sideways Shear 8 lbf Thread Size 5/16 In.-18 Includes - Isolator Material Rubber Mounting Compression Resistant To Abrasion Stud or Tap Material Grade 5 Yellow Zinc Plated