Thomas & Betts 5302 Sealing Ring Brand: Thomas & Betts. Part Number: 5302. T&B Sealing Ring, 1/2 in, For Use With: Rigid/IMC Conduits, Santoprene TPE/Steel, Electro-Zinc Plated, 3/4 in ID x 1-11/64 in OD. Additional Description: TB -5302 RING, SEALING 1/2 RUBBER W/STL. Catalog Description: 1/2 Inch Sealing Ring, Santoprene Thermoplastic Rubber with Stainless Steel Retainer, For Use with Rigid/IMC Conduit..