Thomas & Betts 3309 Cable Connector Brand: Thomas & Betts. Part Number: 3309. T&B Cable Connector, 2-Screw Non-Insulated, 3 in, Cable Openings: 1.15 to 1.98 in, Flex/Non-Metallic Sheathed Cable, Straight, Malleable Iron, Electro-Zinc Plated, Metallic, 1-29/32 in L x 3-5/16 in W x 2-25/32 in H. Additional Description: TB -3309 3 TWO-SCR CONN.. Catalog Description: Sheathed Cable Fitting, Straight, Knockout Size 3 Inch, Two Screw Connector, Malleable Iron with Zinc Plating..