Features Environment-friendly, no pollution, high hardness Made of 304 stainless steel, rust and corrosion resistant There are various common sizes for general purpose use. Well packed and assorted in a resealable transparent box for convenient storage and carry. Generally used for all kinds of machine tools and accessories. Specification: Standard:British system, American system Material: 304 stainless steel  Size & Quantity:  #6-32*3/16  20pcs #6-32*1/4 20pcs #6-32*7/8  20pcs #6-32*3/8 20pcs #6-32*5/8 20pcs #6-32*1/2 20pcs #6-32*5/16 20pcs #6-32*3/4 20pcs   #6-32 Nut  100pcs Weight:approx.311g   Features: Made of 304 stainless steel, rust and corrosion resistant. Environment-friendly, no pollution, high hardness. There are various common sizes for general purpose use. Well packed and assorted in a resealable transparent box for convenient storage and carry.  Generally used for all kinds of machine tools and accessories.  Package list: 1 x 260pcs/box Hex Head Screws Package List