2-5#14, 2-5#12, 2-3#10, 1#14 w/ 1-4#12, 2#14 w/1-3#12, 3#14 w/2 or 3#12, 4#14 w/1#12, 1#14 w/1-3#10, 2#14 w/1 or 2#10, 3#14 w/1#10, 1#12 w/1 or 2#10,2#12 w/1#10 AWG. Nylon insulated grounding connector. Overview: Used for connecting wires in a grounding application; 3M™ Electrical Spring Connector 512G delivers uniform holding power for reliable electrical grounding connections. Wings enable easy, high torque installation. The spring inside the connector has a durable steel construction with a corrosion-resistant coating. It offers enough space to accommodate a wide range of solid or stranded copper wires. UL Listed, CSA Certified and RoHS 2011/65/EU Compliant.; 3M™ Electrical Spring Connector 512G is used to connect 2 or more copper conductors in a grounding application. Its nylon construction provides a flame-retardant property to the connector, making it ideal for use in applications that require safety. The spring design allows them to spin on quickly and tighten down easily.; Twist-on type for quick connection; Used for appliances and fixtures, automotive and marine, commercial construction, industrial construction and residential construction for grounding applications; Delivers uniform holding power; Accommodates a range of 14 to 10 AWG solid copper conductors; Green flame-retardant nylon insulation and corrosion-resistant spring steel construction; UL Listed, CSA Certified and RoHS 2011/65/EU Compliant; 500/bag, 10,000/case - Legal Disclaimer: Manufacturing Origin: USA; The designation that a product is Manufactured in the USA means the product undergoes substantial transformation in one of our U.S. Manufacturing plants. Some products contain imported components.; Note: 3M products offered on a government contract that require country of origin representation must be certified by 3M Trade Compliance. Contact customer service at 800-245-3573 to request a certificate.