25Pc M3x05/M4x07mm Pitch Hex Head Carbon Steel Blind Hole Self Clinching Standoff Nut FS-M3-1/FS-M3-2/FS-M4-1/FS-M4-2 Fastener Description: These standoffs, which use the proven self-clinching design, install with a squeeze in punched or drilled round holes and become permanently mounted in the thin sheet. There is an escrape at the intersection of the hexagon and the cylinder, which makes the riveting effect more firm and not easy to loosen. When blind-threaded types are used, outer sheet surfaces are not only flush, but closed as well. Unthreaded standoffs are also available for spacing multi-panel assemblies. Specification: Product Name: Self Clinching Standoff Material: Carbon Steel Finish: Zinc Plated Thread Size: M3/M4 Thread Pitch: 0.5mm/0.7mm Hex Width: 4.7mm/8mm Overall Height: 1.5mm/2.3mm Cylindrical Outer Diameter: 4.2mm/7.2mm Fit for board thickness: 1mm Mounting Hole Diameter:1.5-2.3mm/2.3+mm Package Content: 25pcs x Self Clinching Standoff _x000D_