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Custom Carbon Steel Truss Hex Head Machine Screws Zinc Plated Coarse Thread For Industrial Equipment Assembly Bulk Wholesale Suppliers, Factories

Machine screws for pre tapped holes or nuts. Full thread from head to tip. Available in stainless steel steel brass aluminium bronze. Phillips pan head flat head hex head slotted round head styles. Metric M2 to M6. Class 4.8 6.8 8.8 10.9 12.9. For electronics appliances instruments machinery assembly.

Product Description

What Are Machine Screws

Machine screws are different from wood screws or self tapping screws. They do not cut their own thread. Instead, they need a pre tapped hole or a nut to hold tight. This makes them perfect for metal to metal fastening where you need a strong, reliable joint that can be taken apart later.

Why Use Machine Screws

You get consistent clamping force every time. The thread runs the full length of the screw from under the head to the tip. This full thread design lets you use the screw with different material thicknesses. You can also take them apart without damaging the threads.

Head Styles We Offer

Phillips Pan Head
The most common drive. Works with any standard Phillips screwdriver. Good for general assembly work.
Flat Head
Features an 82-degree countersunk cone. Sits flush with the surface with no sticking out. Great for finished panels where appearance matters.
Hex Head
Operates with a wrench or socket. Allows higher torque transfer than a standard screwdriver. Good for applications requiring a tight clamp.
Slotted Round Head
Traditional straight-line slot with a domed top. Simple, reliable, and well suited for light to medium duty jobs.

Materials Available

Stainless Steel
Does not rust. Outstanding resistance for outdoor use and wet environments.
Steel with Zinc Plating
Strong and affordable. Zinc electro-coating provides practical rust protection.
Brass
Rust-proof, non-magnetic, and visually appealing. Common for electrical parts and decorative applications.
Aluminium
Lightweight and non-magnetic. Optimal for weight-sensitive precision builds.
Bronze
Superior corrosion resistance. Commonly chosen for marine and heavy-moisture hardware.

Sizes and Grades

Metric sizes from M2 up to M6. Lengths from 3mm to 100mm. Need something bigger or smaller? Just ask.

Strength grades available from Class 4.8 for light duty up to Class 12.9 for heavy duty. Pick what fits your job specifications.

Where People Use Them

Electronics enclosures and PCB mounting. Home appliances and industrial equipment. Automotive parts and precision instruments. Switch plates and computer hardware. Medical devices and general machinery assembly.

Quality You Can Trust

Every batch goes through thread gauging and dimensional checks. We test hardness too. Need a special head style or custom material? We can make it. Bulk pricing available with factory-direct shipping worldwide.

  • Full thread from head to tip for consistent clamping
  • Needs pre tapped hole or nut; does not self tap
  • Phillips pan head, flat head, hex head, slotted round head
  • Stainless steel, steel, brass, aluminium, bronze
  • Metric M2 to M6, Class 4.8 to 12.9
  • Perfect for electronics, appliances, instruments, machinery
Welcome to Yuhuang Fastener!
Feel free to send your inquiry with product details, specifications, or custom requirements. We’ll reply to you within 24 hours with a professional quote.

Frequently Asked Questions

How does a machine screw differ from a self-tapping screw?
Machine screws do not cut their own mating thread during installation. They are designed with uniform machine threads along the shank and require a pre-tapped hole or a matched nut to secure joints.
What are the advantages of fully threaded machine screws?
Full threading from under the head to the tip provides balanced tension and consistent clamping force across different material thicknesses, while allowing safe disassembly and reassembly without thread degradation.
Which machine screw head style is best for a flush surface finish?
Flat head machine screws with an 82-degree countersunk design sit completely flush with the component surface, eliminating snagging hazards and ensuring a clean visual appearance.
What materials are recommended for wet or marine environments?
Stainless steel and bronze are the most reliable choices for marine, damp, and outdoor applications due to their exceptional natural corrosion resistance.
Can I order custom sizes or custom head types?
Yes, beyond our standard metric sizes (M2 to M6) and strength classes (4.8 to 12.9), we offer custom manufacturing for specialized dimensions, drive styles, materials, and batch testing requirements.

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