In Demand 5/16″-18 X 1″ Machine Screws Fillister Head Phillips Drive Steel Zinc Plated (1250/Pkg.)

Machine Screws Phil Fillister — Steel Zinc, 5/16-18 x 1 are high-strength, precision-machined fasteners designed for reliable metal-to-metal assemblies. With a Phillips drive and fillister-style head, these screws seat flush and provide a broad bearing surface for even load distribution and improved torque resistance. The durable zinc finish helps resist corrosion in everyday applications.

Size: 5/16-18 x 1 (UNC coarse thread, 18 threads per inch)

Head style: Fillister

Drive type: Phillips

Material: Steel

Finish: Zinc plating

Thread: Coarse 5/16″-18

Applications: Suitable for metal-to-metal fastenings in equipment, enclosures, automotive panels, and general mechanical assemblies

Benefits include improved load distribution, easier driving with a Phillips bit, and reliable performance in indoor environments where corrosion resistance is desired. These machine screws are designed to pair with the corresponding tapped holes or nuts for secure, lasting connections.

Usage tips: Use with compatible nuts or tapped holes of the same size and thread — 5/16-18 — and choose the correct length for your application (1 inch in this size). For best results, ensure threads are clean and use appropriate torque to avoid thread damage.