5/16″-18 X 1″ Machine Screws Truss Head Phillips Drive Steel Black Oxide (1250/Pkg.) Save Now

Machine Screws Phil Truss Steel Black Oxide 5/16-18 X 1 are precision-engineered fasteners designed for secure metal-to-metal connections in industrial, automotive, and general hardware applications. With a 5/16-18 UNC thread and a 1 inch length, these screws deliver reliable, durable performance across a variety of projects.

Key features

Size & Thread: 5/16-18 UNC; 1 inch length

Material: Steel with a black oxide finish for durability and a low-gloss appearance

Head style: Phil Truss head, offering a broad bearing surface for even load distribution

Drive type: Phillips drive for common, easy tool compatibility

Finish: Black oxide provides modest corrosion resistance and reduced glare

Applications: Ideal for metal-to-metal fastenings in machinery, panels, enclosures, and general hardware projects

These machine screws are designed to work with standard 5/16-18 nuts or tapped holes, providing a reliable fit for a wide range of assemblies. The wide truss head helps distribute load and minimize pull-through, making them suitable for softer metals and thin panels where a secure seating is essential.

Usage tips

Use a Phillips screwdriver or bit to prevent cam-out and ensure a snug seating

Pre-drill pilot holes when working with harder materials to reduce stress and prevent splitting

Avoid over-tightening to protect threads and maintain fastener integrity