Stainless Steel Hex Head Cap Screws in Grades 18-8 and 316
Stainless steel grades 18-8 and 316 are two of the most widely used materials for hex head cap screws, offering an excellent combination of strength, durability, and corrosion resistance. These fasteners are commonly selected for applications where long service life and resistance to harsh environments are essential, making them a preferred choice across many industries.
Stainless Steel Grade 18-8 Hex Head Cap Screws
Grade 18-8 stainless steel is composed of approximately 18% chromium and 8% nickel, providing strong resistance to corrosion in a broad range of conditions. This alloy performs well in atmospheric exposure, freshwater environments, and in the presence of mild chemicals. Grade 18-8 also offers good mechanical strength and can withstand operating temperatures up to 870°F (465°C), making it suitable for most general-purpose fastening needs.
Hex head cap screws manufactured from 18-8 stainless steel are widely used in construction, automotive assemblies, household appliances, and light industrial equipment. Their balance of strength and corrosion resistance makes them ideal for everyday applications where moisture resistance and clean appearance are required. Contractors, maintenance professionals, and manufacturers rely on 18-8 fasteners for dependable performance in non-extreme environments.
Stainless Steel Grade 316 Hex Head Cap Screws
Grade 316 stainless steel, often referred to as marine-grade stainless steel, contains molybdenum, which significantly enhances corrosion resistance. This added element provides superior protection against chlorides, saltwater, and acidic environments. As a result, 316 hex head cap screws offer exceptional resistance to pitting and crevice corrosion in aggressive conditions.
These fasteners are commonly specified in marine construction, coastal infrastructure, chemical processing, food and pharmaceutical manufacturing, and oil and gas applications. Engineers and technicians working in corrosive environments favor Grade 316 for its long-term durability and reliability.
Choosing the Right Stainless Steel Grade
18-8 stainless steel for general-purpose corrosion resistance
316 stainless steel for marine and chemical exposure
Both grades offer strength, reliability, and long service life
Selecting between 18-8 and 316 stainless steel hex head cap screws depends on environmental exposure and performance requirements, ensuring optimal fastening performance for every application.