5/16″-18 X 1-1/2″ Machine Screws Indented Hex Head 18/8 Stainless Steel (500/Pkg.) Factory Price

Engineered for dependable fastening in metal and plastic assemblies, these Machine Screws feature an unslotted indented hex drive and 18/8 stainless steel construction for superior corrosion resistance. Sized 5/16-18 x 1-1/2 in., they deliver strong, precise threading in a compact, secure screw.

Drive type: Indented hex (security hex) unslotted for tamper-resistant installation.

Material: 18/8 stainless steel (AISI 304) for excellent corrosion resistance.

Size: Diameter: 5/16 in; Thread: 18 per inch; Length: 1-1/2 in.

Finish: Passivated for enhanced surface protection.

Applications: Ideal for machinery, electronics enclosures, automotive assemblies, and outdoor installations where a secure hex drive is required.

Why choose 18/8 stainless steel machine screws? The 18/8 composition (roughly 304 stainless) provides a balanced combination of strength, corrosion resistance, and formability, making these screws suitable for environments with moisture, humidity, or exposure to the elements. The indented hex drive adds a level of tamper resistance while maintaining a compact profile for tight spaces.

Packaging and compatibility: These screws are designed for standard 5/16-18 threads, compatible with components using standard machine screw threads. Perfect for hardware kits, repair projects, and professional installations that demand reliable, long-lasting fasteners.