Feature:Use on cars and vehicles.This rivet nut has a large flange to provide increased strength in punched and drilled holes.Knurled body provides a higher resistance to swivel when installed in soft materials.A rivet nut fastener is a tubular rivet with internal threads. It can be installed in seconds form one side of the work.Once installed, they are permanently attached to the mating material, allowing the associated nut to be removed in service without the risk of the fastener becoming dislodged.Specification:Material: Aluminum AlloyColor: Silver ToneThread Size: M4Body Diameter: 5.9mm/0.23"Grip Range: 0.5-2mm/0.02"-0.08"Head Diameter: 8.7mm/0.34"Application Hole Size: 4.8mm/0.19"Total Length: 10.5mm/0.