Flange Bolts are named for the ridge or skirt around the bolt head. A flange bolt is designed to provide holding power as if a washer was installed. The skirt acts as a distributor of the entire clamping load. Flange bolts help make jobs easier and faster with their multi-feature function. Stainless steel bolts are the most common type of flange bolts, but they are available in a variety of sizes and materials, making them ideal for a number of applications. After stainless steel bolts, some of the most commonly used materials include:

• Carbon and Alloy Steel: high temperature stress, may become brittle below -65°F
• Cadmium plated: the best option to withstand all environments and conditions
• Zinc chromate: similar properties to cadmium plated, but not as expensive
• Anodized aluminum: corrosion resistance roughly equal to stainless steel bolts