APPLY TO - Hex head bolts are widely used in the assembly and maintenance of households, machine tools, construction, ships, and DIY project. Such as the assembly and fixing of guardrails, home appliances, pipeline installations, equipment, steel-framed houses, etc.SPECIFICATION:Product Name: Hex Head BoltsMaterial: 316 Stainless SteelThread Size: 3/8-16x5-1/2"Hex Head Size: 0.563"(D)x0.25"(T)QUANTITY INCLUDED - 10pcs x Hex BoltsDESIGN - Threads are well-machined and accurately cut. Sharp, smooth, speeding up the fastening process in many applications, meeting all demands.ADVANTAGE - Our bolts are made of 316 stainless steel, which is superior to regular steel and any zinc-plated fasteners, sturdy and durable. The surface treatment is oxidation to improve the corrosion resistance of carbon steel bolts.