✅ Coupling Nut Reducer, 5/16"-18 and 1/4"-20, Steel, Grade 2, Zinc Plated, 1 in Lg, 1/2 in Hex Wd ✅ Material: Steel ✅ Finish: Zinc Plated ✅ Thread Size: 5/16"-18 and 1/4"-20 ✅ System of Measurement: Inch 250662BG Coupling Nut Reducer, Material Steel, Material Grade/Class Grade 2, Finish Zinc Plated, Thread Size A 5/16 In.-18, Thread Size B 1/4 In.-20, Thread Style Fully Threaded, Hex Width 1/2 in, Overall Length 1 in, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Proof Load 90,000 psi, Rockwell Hardness C32, Package Quantity 10