3M 30019 Compression Lugs, 1/4 in Stud Size, 4 AWG For Wire Sizes, Stranded Wire Type, Std, Copper SP225 they are best suited for

they are best suited for permanent fixtures that don't require frequent adjustments or disassembly

Range (F) 0 Degrees - 400 Degrees F Mounting Holes Tapped Mounting Hole Center to Center 8 in Finish Ceramic Coated Min

Corrosion-Resistance Jaw Capacity 1 7/8 in Nonsparking No Standards ASME B107

Major Repair Kit 5

3M 30019 Compression Lugs, 1/4 in Stud Size, 4 AWG For Wire Sizes, Stranded Wire Type, Std, Copper SP225 they are best suited forCompression Lugs, Barrel Size Standard, Color Code Gray, Die Code 8, 95, Tongue Angle Straight, Tongue Width 0. 48 in, For Conductor Material Copper, For Stud Size 1 4 in, For Stranded Copper Wire Size Maximum 4 AWG, Inspection Hole No, Material Copper, Maximum Voltage 35 kV, Termination Style Crimp, Standards CSA Certified, UL Listed, Number of Holes 1, RoHS Compliant Yes, Barrel Inside Diameter 0. 24 in, Barrel Outside Diameter 0. 34 in For Wire