Finished 18-8 SS Fractional Size Hex Nut

Fractional Sizes of 18-8 Stainless Steel Finish Hex Head Nuts

Specifications and Common Applications

18-8 stainless steel finish hex head nuts are a go-to fastening solution for industrial, commercial, and construction applications where corrosion resistance and dependable strength are required. Manufactured from an austenitic stainless steel alloy containing approximately 18% chromium and 8% nickel, these nuts offer excellent resistance to rust, oxidation, and mild chemical exposure. Their finished hex design allows for easy installation with standard hand tools, making them a reliable choice for both indoor and outdoor assemblies.

Available in a wide range of fractional sizes, 18-8 stainless steel hex nuts are designed to pair with matching unified threaded bolts, ensuring consistent fit and performance across many applications.

Fractional Size Options

Compatible with Standard Inch-Series Fasteners

18-8 stainless steel finish hex head nuts are commonly produced in popular fractional sizes used throughout North America. Typical size offerings include:

• 1/4"-20

• 5/16"-18

• 3/8"-16

• 1/2"-13

• 5/8"-11

• 3/4"-10

Each size is defined by bolt diameter and threads per inch (TPI). For example, a 1/2"-13 nut fits a 1/2-inch diameter bolt with 13 threads per inch. This standardized sizing ensures compatibility with a broad range of machinery, structural components, and general-purpose hardware.

Material Specifications and Performance

Strength, Corrosion Resistance, and Standards

18-8 stainless steel finish hex head nuts provide an ideal balance of strength and corrosion resistance for moderate to high-load applications. Key specifications include:

• Material: 18-8 stainless steel (A2 equivalent)

• Thread Type: Unified National Coarse (UNC) or Unified Thread Standard (UTS)

• Finish: Plain, uncoated stainless steel

• Strength: Suitable for moderate to high-strength fastening

• Standards: Commonly manufactured to ASTM A194 and ASME B18.2.2

Typical Applications

18-8 stainless steel finish hex head nuts are widely used in construction assemblies, automotive components, marine hardware, HVAC systems, and general fabrication. Their corrosion resistance makes them especially effective in environments exposed to moisture, humidity, and mild chemicals.

By combining standardized fractional sizing with proven stainless steel performance, 18-8 finish hex head nuts deliver long-lasting reliability and versatility for a wide range of fastening needs.