Thomas & Betts 5265 Liquidtight Sealing Gasket Brand: Thomas & Betts. Part Number: 5265. T&B Sealing Gasket, 1-1/4 in, For Use With: Liquid Tight Flexible Metal Conduits, 316 Stainless Steel, Gray, 2-5/32 in OD x 7/32 in THK. Additional Description: TB -5265 RING,SEALING-1-1/4 RUBBER W/ST. Catalog Description: Liquidtight Sealing Gasket, 1-1/4 Inch, with 316 Stainless Steel Retainer Ring and Thermoplastic Molded Seals..