1Designed with 304 stainless steel material, the 304 stainless steel material provides strength and offers good corrosion resistance in many environments 2Fixing component, for industrial and construction fasteners 3Widely used in energy, electronics, electrical appliances, machinery, chemical industry, metallurgy, mold, hydraulic, and so on 4This item kit includes M3 M4 M5 hex socket flat head screw bolts and hex nuts,is a ideal combination. 5This bolts screws and nuts come with a plastic box, so is convenient to storageFeatures: _x000D_Designed with 304 stainless steel material, the 304 stainless steel material provides strength and offers good corrosion resistance in many environments. _x000D_Fixing component, for industrial and construction fasteners._x000D__x000D_Widely used in energy, electronics, electrical appliances, machinery, chemical industry, metallurgy, mold, hydraulic, and so on. _x000D_This item kit includes M3 M4 M5 hex socket flat head screw bolts and hex nuts, is a ideal combination. _x000D__x000D_This bolts screws and nuts come with a plastic box, so is convenient to storage. _x000D__x000D__x000D_Specifications: _x000D_Model: Flat Head Hex Socket _x000D_Weight: 506g _x000D__x000D_M3 X 8mm_x000D_20pcs_x000D__x000D_M3 X 12mm_x000D_20pcs_x000D__x000D_M3 X 16mm_x000D_20pcs_x000D__x000D_M3 X 20mm_x000D_20pcs_x000D__x000D_M3 Nuts _x000D_80pcs_x000D__x000D_M4 X 8mm_x000D_20pcs_x000D__x000D_M4 X 12mm_x000D_20pcs_x000D__x000D_M4 X 16mm_x000D_20pcs_x000D__x000D_M4 X 20mm_x000D_20pcs_x000D__x000D_M4Nuts_x000D_80pcs_x000D__x000D_M5 X 8mm_x000D_15pcs_x000D__x000D_M5 X 12mm_x000D_15pcs_x000D__x000D_M5 X 16mm_x000D_15pcs_x000D__x000D_M5 X 20mm_x000D_15pcs_x000D__x000D_M5 Nuts_x000D_60pcs_x000D__x000D__x000D_Package Included: _x000D_440pcs M3 M4 M5 Hex Socket Flat Head Screw Bolts and Nuts kit