Color as shown.Size: 19.8cm13.4cm3.8cm weight:859 grams Different screw sizes: M38,M312,M316,M320,M48,M412,M416,M420,M58,M512,M516 , M5 20, M68, M612, M616, M620 to meet different needs. It is a very important family hand tool. With M3, M4, M5 and M6 nuts and washers, installations are now more precise with an increased contact area that reduces pressure and protects parts and screws. Nuts and washers are arranged in a storage box, making it easier for you to find the series and avoid losses if necessary. They are antioxidant and corrosive even at high temperatures. The main application of stainless steel hex head bolts is widely used in electronics, electrical appliances, chemicals, water, machinery and equipment, furniture and many other fields.