10pcs UNC Stainless Steel Grub Set Screws Hex Socket 2#-56 to 6#-32

10pcs UNC Stainless Steel Hex Socket Head Set Screws (Grub Screws)

Get a reliable, corrosion-resistant fastening solution with these precision-made stainless steel grub screws. Available in a range of UNC thread sizes — 2#-56, 4#-40, 5#-40, and 6#-32 — and lengths from 1/4" to 5/16", these headless set screws are engineered for metalworking, machinery assembly, DIY projects, and industrial applications where a flush or recessed fastener is required.

Each screw features a hex (Allen key) socket drive for secure torque transmission with no slippage, and is manufactured from high-grade stainless steel for excellent strength and long-lasting rust resistance. CE and RoHS certified for quality assurance.

Made in Mainland China.

Key Features

• Thread Standards: UNC — 2#-56 | 4#-40 | 5#-40 | 6#-32
• Lengths Available: L1/4", 1/8", 3/16", 5/16"
• Drive Style: Hex Socket (Allen Key)
• Head Style: Headless / Grub (Set Screw)
• Material: Stainless Steel (M3-p0.5 x3 equivalent)
• Quantity: 10 pieces per lot
• Certifications: CE, RoHS
• Customizable: Yes

Common Applications

• Securing pulleys, gears, and knobs to shafts
• Metalworking and precision machinery assembly
• Electronics enclosures and DIY fabrication
• Robotics, 3D printers, and CNC equipment
• General hardware and industrial fastening tasks

Why Choose These Set Screws?

The headless grub screw design allows for flush fitting and tamper-resistant installation, making these ideal for applications where a protruding head would interfere with moving parts or aesthetics. The hex socket drive ensures compatibility with standard Allen/hex keys for easy installation and removal.

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Learn more: OSHA guidance on hand and power tools

Frequently Asked Questions

Q: What thread sizes are included in this set of UNC grub screws?

A: These stainless steel hex socket set screws are available in UNC thread sizes 2#-56, 4#-40, 5#-40, and 6#-32, with lengths ranging from 1/4" to 5/16". Please select your preferred size before ordering.

Q: What tool do I need to install these hex socket set screws?

A: These grub screws use a standard hex (Allen key) socket drive, so you'll need the appropriately sized Allen/hex wrench or hex key bit to install and tighten them securely.

Q: Are these set screws suitable for outdoor or corrosive environments?

A: Yes. Made from stainless steel, these grub screws offer excellent resistance to rust and corrosion, making them suitable for use in both indoor and moderately demanding outdoor or industrial environments.

Q: How many screws come in each order?

A: Each lot contains 10 pieces of the selected size. They are CE and RoHS certified, ensuring they meet quality and safety standards for use in a wide range of metalworking and assembly applications.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.