Standard Ribbed Ceramic Bushing Ceramic ribbed and grooved bushings are commonly used to support wires and rods and as guides in high voltage electrical equipment. Click on dimension header to list by size Part No. Material Rib OD ID Length A-0238 L-3 Steatite 0.688 0.383 0.375 A-3021 L-3 Steatite 0.875 0.475 0.495 A-4244 L-3 Steatite 0.750 0.400 0.660 A-4156 L-3 Steatite 0.750 0.322 0.630 A-2122-1 L-3 Steatite 0.750 0.375 0.625 A-3900 L-3 Steatite 0.748 0.201 0.630 A-3099 L-3 Steatite 0.730 0.380 0.500 A-1025 L-3 Steatite 0.730 0.380 0.440 EM-2776 L-3 Steatite 0.688 0.383 0.500 A-0905 L-5 Steatite 0.703 0.375 0.375 A-2597 L-5 Steatite 0.875 0.457 0.507 Download .pdf