Why Choose Slotted/Phillips Truss Combo Head Machine Screws?
Slotted/Phillips truss combo head machine screws are useful when a wider head is helpful for holding thin material, panels, brackets, or hardware in place. The truss head has a broad bearing surface and a low rounded profile, which helps spread clamping pressure across the material while keeping the head from sitting too high above the surface.
The combination drive gives installers two common tool options. A Phillips screwdriver can be used for faster driving, while a slotted screwdriver can be used when a flat blade is preferred or more readily available.
Common Uses for Slotted/Phillips Truss Combo Head Machine Screws
These screws are commonly used in equipment assembly, hardware installation, brackets, access panels, light-duty metal fastening, furniture hardware, and other applications where a machine-threaded fastener is needed.
They are often selected when the application needs a broad, low-profile head and a reusable threaded connection.
How to Choose the Right Size
Match the screw diameter and thread pitch to the tapped hole, threaded insert, or nut being used. Machine screws are not designed to create their own threads in the same way as wood screws or sheet metal screws, so the mating threads need to be compatible.
Choose a length that provides enough thread engagement without bottoming out in a blind hole or extending too far past the nut or back side of the assembly.
Zinc Plated Steel Slotted/Phillips Truss Combo Head Machine Screws
Zinc plated steel machine screws are a common choice for general-purpose indoor fastening. The zinc finish provides a clean appearance and helps protect the steel from light corrosion in dry environments.
For outdoor, wet, marine, or corrosive environments, stainless steel or another corrosion-resistant material may be a better choice if available for the application.
Slotted/Phillips Truss Combo Head Machine Screw FAQs
What is a truss head machine screw?
A truss head machine screw has a wide, low-profile head that provides a larger bearing surface than many other head styles. This makes it useful for fastening panels, brackets, and thin materials.
What does slotted/Phillips combo drive mean?
A slotted/Phillips combo drive can be installed with either a flat blade screwdriver or a Phillips screwdriver. This gives the installer more flexibility than a single-drive screw.
Do machine screws need a nut?
Machine screws can be used with a matching nut, threaded insert, or tapped hole. The screw size and thread pitch must match the mating threads.
Are zinc plated machine screws good for outdoor use?
Zinc plated steel is best for general indoor or dry applications. For outdoor or corrosive environments, stainless steel or another corrosion-resistant fastener is usually preferred.