Answer two questions — we'll recommend the mount size and jump you to the right chart section below.
Recommended: diameter rubber, thread.
Use at least 3–4 mounts so the load is shared. Taller rubber gives softer isolation for low-frequency shaking. Scroll to the section in the chart below and pick the row matching your rubber size and stud configuration.
Rubber Vibration Isolator Mount Size Chart — By Thread Size & Configuration
Use this rubber vibration isolator mount size chart to match a replacement mount or spec a new installation. Mounts are identified by three specs: rubber diameter x rubber height, thread size, and stud configuration (M/M = stud both ends, M/F = stud one end + threaded insert, F/F = threaded inserts both ends). Measure your old mount's stud thread and rubber dimensions, then find the row below.
Divide the equipment weight by the number of mounts to get load per mount, then size the rubber diameter: 3/4" for light bench equipment, 1" for typical motors and compressors, 1-1/4"+ for heavy machinery. Taller rubber = softer isolation for low-frequency shaking. Always use 3–4 mounts so the machine cannot rock. Full guidance: how to choose vibration isolator mounts • browse all 150+ mounts • washing machines and dryers use pad-style isolation instead.