Plug springs are somewhat different from common terminals but have the same features. So 6.3 plug springs are 6.3 plug spring terminals and they are the same product. 6.3 The known size of the plug spring is 5.2mm, the material is copper or copper tin plating, the suitable wire is 22-26, the color is copper yellow, silver, gold, etc., the red cloud terminal can be changed according to customer needs Style.