Feature:

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 from 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 fall off.

Specification:
Material: Aluminum Alloy
Color: Silver Tone
M3 Body Diameter: 4.9mm/0.19"
M3 Head Diameter: 7.2mm/0.28"
M3 Grip Range: 0.5-1.5mm/0.02"-0.06"
M3 Application Hole Size: 3.9mm/0.15"
M3 Total Length: 9mm/0.35"
M4 Body Diameter: 5.9mm/0.23"
M4 Grip Range: 0.5-2mm/0.02"-0.08"
M4 Head Diameter: 8.7mm/0.34"
M4 Application Hole Size: 4.8mm/0.19"
M4 Total Length: 10.5mm/0.41"

Package Included:
110pcs x M3 Rivet Nuts
110pcs x M4 Rivet Nuts

Installation Instructions:
A hand or power tool pull-up stud engages the threads of the rivet nut fastener and exerts a pull, causing the shank to expand tightly against the material being fastened. This step upsetting the rivet nut fastener.
The specific steps as following:
Step 1: Put on the rivet nut
Step 2: Swivel on the rivet nut
Step 3: Insert into the hole
Step 4: Press riveting nut, pull out the riveting gun
Step 5: Install the screw bolt