18-8 Stainless Steel Hex Head Screw | 5/16"-18 Thread Size, 1/2" Length | Pack of 50

These 18-8 Stainless Steel Hex Head Screws in 5/16"-18 thread size and 1/2" length are built for strong, reliable fastening in demanding environments. Made from corrosion-resistant 18-8 stainless steel, these screws deliver excellent durability against rust, chemicals, and moisture—making them ideal for outdoor, marine, industrial, and pressure washing or softwash system applications.

The hex head design ensures secure tool engagement and superior torque control, giving you dependable fastening for machinery, equipment frames, brackets, trailers, and fabrication projects. Sold in convenient 50-packs for professional and shop use.

Key Features

• Made from corrosion-resistant 18-8 (304) stainless steel

• 5/16"-18 coarse thread provides strong thread engagement

• 1/2" length ideal for compact, shallow fastening

• Hex head delivers excellent grip and torque strength

• Resistant to rust, oxidation, and harsh environments

• Pack of 50 provides value for commercial and workshop use

Product Specs

• Material: 18-8 Stainless Steel (AISI 304)

• Thread Size: 5/16"-18 (Coarse thread)

• Length: 1/2 inch

• Head Type: Hex head screw

• Pack Quantity: 50

• Country of Origin: Made outside the U.S.

• Standards: Complies with ANSI/ASME B18.2.1

• Applications: Softwash systems, pressure washer rigs, industrial equipment, marine environments, trailers, construction, fabrication, automotive

Perfect For

• Pressure washing and softwash equipment builds

• Bracket and pump mounting

• Trailer fabrication and rig assembly

• Outdoor, marine, and corrosive environments

• Industrial machinery and metalworking

• General-purpose stainless fastening

These hex head stainless steel screws provide long-lasting strength and corrosion resistance for demanding applications.