Yali 240PCS M2 M3 Screws Threaded Standoffs Male Female Brass Standoff Spacer PCB Board Hex Screws Nuts Assortment Kit Hardware
A standoff is a fastener that is used to create space between two objects, often to properly position them. In the world of electronic components and electronic hardware, standoffs are typically used to space circuit boards, panels, doors or gears. 
Features: 
Made of high grade brass and stainless steel for solid and long service life.
Well manufactured surface without any bur, do no harm and feels quite comfortable.
Waterproof, rust resistant and easy to clean.
Includes Female-Female, Female-Male standoffs in different sizes, screws and nuts.
Resealable transparent plastic box for convenient carry and storage.
Widely used in electric equipment, automotive, engineering machinery, and other fields.
Specifications:
Main material: stainless steel+brass
Package weight: 208g / 7.33oz
Package size: 125 * 65 * 20mm / 4.92 * 2.56 * 0.79in
Package List: 
1.Screw:
    20pcs * PM2*5mm (D*H) 
    20pcs * PM3*6mm (D*H) 
2.Nut:
    20pcs * M2  
    20pcs * M3  
3.Female Brass Standoff:
    10pcs * M2*5mm 
    10pcs * M2*10mm  
    10pcs * M2*15mm  
    10pcs * M2*20mm  
    10pcs * M3*6mm  
    10pcs * M3*10mm  
    10pcs * M3*15mm  
    10pcs * M3*20mm  
4.Male Brass Standoff:
    10pcs * M2*5+3mm  
    10pcs * M2*10+3mm  
    10pcs * M2*15+3mm  
    10pcs * M2*20+3mm  
    10pcs * M3*6+6mm  
    10pcs * M3*10+6mm  
    10pcs * M3*15+6mm  
    10pcs * M3*20+6mm