Stainless Steel Heavy Hex Bolt

A stainless steel (SS) heavy hex bolt is a high-strength fastener featuring a visibly larger and thicker hexagonal head than a standard hex bolt, engineered for high-load, high-pressure, or corrosive environments.

Key Characteristics

• Head Design: Possesses a larger width across flats and a thicker head height compared to standard hex bolts, distributing clamping force over a wider surface area.
• Material Composition: Commonly manufactured from austenitic stainless steel grades such as 304 (18-8) or 316 (which includes molybdenum for enhanced chloride and chemical resistance), as well as high-temperature/low-temperature specs like ASTM A193 or A320.
• Dimensions & Standards: Conforms to specifications such as ASME B18.2.1, with imperial and metric sizing (ranging from small diameters up to large structural sizes like M100 or several inches).
• Thread Types: Available in coarse (UNC) or fine (UNF) thread patterns, with partial or full-length threading depending on the bolt length and application.

Common Applications

• Heavy Construction & Structural Steel: Securing major framework joints and embedded anchor assemblies.
• Petrochemical & Chemical Plants: Used in high-temperature or cryogenic piping and flanged connections (often paired with heavy hex nuts).
• Marine & Offshore Environments: Utilized where superior rust and corrosion resistance are mandatory.