Thomas & Betts 2520 Cord Connector Brand: Thomas & Betts. Part Number: 2520. T&B Strain Relief Cord Connector, Liquidtight, Series: Ranger , 1/2 in, Cable Openings: 1/8 to 1/4 in, S/SO Cable, Thread, Die Cast Zinc, Zinc Plated, Metallic, 105 deg C, 1-5/32 in Dia x 1-11/16 in L. Additional Description: TB -2520 1/2IN CORD CONNECTOR .125-.250 RANG RANGE. Catalog Description: Liquidtight Strain Relief Cord Connector, 1/2 Inch, Straight, Cord Range 0.125 to 0.250 Inch, Die Cast Zinc..