1Made of 12.9 grade alloy carbon steel, which provides strength and is commonly used when requiring higher mechanical properties 2Ideal for use in confined areas where you need hex socket cap head screws 3Fixing component, industrial and construction fasteners 417 common sizes and different quantities that you can choose for general purpose use 5Used widely in the home and office appliance, communication equipments, ship assembly and other machinery industryDescription: _x000D_These screws and nuts are made of 12.9 grade alloy carbon steel, which provides strength and is commonly used when requiring higher mechanical properties. There are many length for your choice which can be commonly used in home and office appliance, machinery, furniture, repair and DIY inventions. _x000D__x000D__x000D_Features: _x000D_Made of 12.9 grade alloy carbon steel, which provides strength and is commonly used when requiring higher mechanical properties. _x000D_Ideal for use in confined areas where you need hex socket cap head screws. _x000D_Fixing component, industrial and construction fasteners. _x000D_17 common sizes and different quantities that you can choose for general purpose use. _x000D_Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry. _x000D__x000D__x000D_Specifications: _x000D_Material: 12.9 grade alloy carbon steel _x000D_Color: Black_x000D__x000D_Type: Hex socket cap head _x000D_Size:(optional) _x000D_M3*4mm(fully-threaded) _x000D_M3*5mm(fully-threaded) _x000D_M3*6mm(fully-threaded) _x000D_M3*8mm(fully-threaded) _x000D_M3*10mm(fully-threaded) _x000D_M3*12mm(fully-threaded) _x000D_M3*14mm(fully-threaded) _x000D_M3*16mm(fully-threaded) _x000D_M3*18mm(fully-threaded) _x000D_M3*20mm(fully-threaded) _x000D_M3*22mm(fully-threaded) _x000D_M3*25mm(fully-threaded) _x000D_M3*30mm(partially-threaded) _x000D_M3*35mm(partially-threaded) _x000D_M3*40mm(partially-threaded) _x000D_M3*45mm(partially-threaded) _x000D_M3*50mm(partially-threaded) _x000D_Quantity: 24pcs, 50pcs, 100pcs(optional) _x000D__x000D__x000D_Package Includes:_x000D_1 Bag x Screws _x000D__x000D__x000D__x000D_Note:_x000D_1. Please allow 1-2mm error due to manual measurement. Thanks for your understanding._x000D_2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.