Fractional Sizes Stainless Steel 18-8 Heavy Duty Hex Nut

Fractional Sizes of 18-8 Stainless Steel Heavy-Duty Hex Head Nuts

Specifications and Performance Benefits

18-8 stainless steel heavy-duty hex head nuts are engineered for demanding fastening applications where strength, corrosion resistance, and long-term reliability are essential. Featuring a thicker profile than standard hex nuts, heavy-duty hex nuts provide increased thread engagement and load distribution, making them ideal for structural, industrial, automotive, and marine environments. Available in a wide range of fractional (inch) sizes, these nuts are designed to pair with standard UNC threaded bolts for secure, high-performance assemblies.

Fractional Sizes and Common Applications

Designed for Structural and Industrial Use

18-8 stainless steel heavy-duty hex head nuts are offered in common fractional sizes to accommodate a broad range of fastening needs, including:

• 1/4″-20

• 5/16″-18

• 3/8″-16

• 1/2″-13

• 5/8″-11

• 3/4″-10

• 1″-8

Each size is defined by the bolt diameter and threads per inch (TPI), ensuring proper fit, consistent torque values, and reliable clamping force. Larger sizes, such as 3/4″ and 1″, are commonly used in structural steel, heavy equipment, and load-bearing assemblies, while smaller sizes are ideal for machinery and industrial components.

Material and Technical Specifications

Heavy-Duty Stainless Steel Construction

Manufactured from 18-8 stainless steel (A2 stainless), these heavy-duty hex nuts contain approximately 18% chromium and 8% nickel, providing excellent resistance to corrosion, oxidation, and many chemicals.

Key specifications include:

• Material: 18-8 (A2) Stainless Steel

• Thread Type: Unified National Coarse (UNC)

• Finish: Plain or lightly passivated

• Design: Heavy-duty hex pattern for increased strength

• Standards: ASTM A194, ANSI B18.2.2

Benefits of 18-8 Heavy-Duty Hex Nuts

The increased thickness of heavy-duty hex head nuts enhances load capacity, reduces thread stripping, and improves performance under vibration and stress. Combined with the corrosion resistance of 18-8 stainless steel, these nuts deliver dependable fastening performance in both indoor and outdoor environments. Ideal for high-strength, long-life applications, they are a trusted choice for professionals who demand durability and reliability.