DescriptionDIY Supplies : WoodworkingMaterial : Stainless steelCertification : NONE100 Pcs M3x9mm Countersunk Head Blind Rivet Nuts & 50 Pcs M3 X 12Mm Metric Hex Socket Head Screw Bolts100 pcs M3X9mm Nuts & 50 pcs M3 x 12mm Screw BoltsFlat head cap screws, M3 female thread diameter, 9mm total length, zinc plated surface, carbon steel rivet nut.This nutsert has a large.flange to provide increased strength in punches and drilled holes.Knurled body provides a higher resistance to spin out when installed in soft materials.A Rivnut fastener is a tubular rivet with internal threads.It can be installed in seconds form one side of the work.Once installed, no finishing work is required on the Rivnut fastener.The added advantage of not only being a dependable fastener, they are ready to use with clean threads available for screw attachments.Blind thin sheet materials that are too thin for a tapered thread.Blind Rivet Nuts also are used when an application has little or no access to the backside as they can be installed from the front side of the work piece.304 Stainless Steel Material, 0.5mm Thread Pitch, Hex Key Hex Socket, Countersunk Flat Head Bolts Screws, M3 x 12mm.Countersunk bolts is anti-corrosion,rustless,non-pollution and high-hardness.It is widely used in industrial.Rivet Nuts:Thread Size: M3/ 0.12 inchProduct Name: Rivet Nut; Material: Carbon Steel, Zinc Plated; Main Color: Bronze Tone;Flange Size: 8 x 0.8mm/ 0.3inch x 0.03 inch (D * Thickness)Thread Pitch: 0.5mm; Total Length: 9mm/ 0.35 inchBody Diameter: 5mm/ 0.2 inch; Application Hole Size: 4mm/ 0.16 inchHow Does a Rivnut Work:A hand or power tool pull-up stud engages the threads of the Rivnut fastener and exerts a pull, causing the shank to expand tightly against the material being fastened.This step is what is called upsetting the Rivnut fastener.The specific steps as following:Step 1: Put on the rivet nutStep 2: Spin on the rivet nutStep 3: Insert into the holeStep 4: Press and upset the rivet nut, withdraw the gunStep 5: Install the screw boltCountersunk Bolts:Drive Type: Hex SocketHead Style: Flat HeadMaterial: 304 Stainless SteelProduct Name: Countersunk Bolt; Thread Size: M3 x 10mm(D*L)Color: Silver ToneThread Pitch: 0.5mmTotal Length: 12mm/ 0.47inchHead Size: 6 x 2mm/0.24inch x 0.08inch(D*T)Width Across Flat (S): 2mm/ 0.08inchPackage Content:100 x Rivet Nuts50 x Countersunk BoltsOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.