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Vichok Hardware
M3 M4 M5 12.9 Grade Nickel-Plated Hex Socket Concave End Set Screws Headless Set Screws for Machinery Equipment Fastening, Industrial Repair & Hardware Fixing
M3 M4 M5 12.9 Grade Nickel-Plated Hex Socket Concave End Set Screws Headless Set Screws for Machinery Equipment Fastening, Industrial Repair & Hardware Fixing
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High-Strength 12.9 Grade Nickel-Plated Hex Socket Concave End Set Screws – the industrial-grade headless fastening solution engineered for heavy-duty machinery equipment assembly, industrial repair, hardware fixture locking and precision mechanical component fixing! Crafted to the ultra-durable 12.9 strength grade and finished with a corrosion-resistant nickel plating, these M3/M4/M5 hex socket concave end set screws deliver unshakable torque, secure anti-slip locking and long-lasting performance for professional industrial, mechanical and hardware applications. Ideal for locking shafts, pulleys, gears, bearings and other precision mechanical parts, they’re the go-to fastener for machinists, industrial technicians, equipment manufacturers and hardware professionals seeking reliable, high-torque headless set screws for critical fastening tasks.
Engineered for maximum strength and functionality, the 12.9 grade carbon steel core offers exceptional tensile and shear strength, supporting heavy-duty load requirements and high-torque installation—perfect for industrial machinery and mechanical equipment that demands stable, vibration-resistant fastening. The nickel-plated finish provides superior rust, corrosion and oxidation resistance, ensuring long-term performance in indoor industrial environments, workshop settings and mild outdoor applications, while also delivering a smooth, wear-resistant surface for easy installation and disassembly. The hex socket drive (inner hexagon) enables precise, high-torque operation with standard hex keys, preventing slippage and stripped drives during installation, and the concave end design delivers a tight, press-fit grip on mating surfaces, locking components firmly in place to eliminate movement and slippage caused by machine vibration.
As headless set screws (also known as grub screws), these fasteners sit flush within drilled holes, eliminating protrusions that could interfere with mechanical movement—critical for precision machinery, rotating parts and compact hardware fixtures. Available in three commonly used metric sizes (M3, M4, M5), they offer versatile fastening for a wide range of industrial and mechanical applications, from small equipment components to medium-duty machinery parts. Precision-machined threads ensure a tight, seamless fit with tapped holes, providing a secure hold that resists loosening under constant vibration and heavy use. Whether you’re assembling industrial machinery, repairing mechanical equipment, locking pulleys and gears, or fixing precision hardware fixtures, these 12.9 grade nickel-plated set screws combine industrial-strength durability, corrosion resistance and precision functionality—an essential component in every industrial workshop, machinist toolbox and equipment maintenance kit.
Key Features
- 12.9 Ultra-High Strength Grade: Carbon steel core delivers exceptional tensile/shear strength for heavy-duty, high-torque industrial applications
- Nickel-Plated Coating: Superior rust/corrosion resistance, wear-resistant surface and long-lasting performance in industrial/workshop environments
- Hex Socket (Inner Hexagon) Drive: Precise high-torque operation with standard hex keys, anti-slip design prevents stripped drives
- Concave End Design: Tight press-fit grip on mating surfaces, eliminates component movement/slippage from machine vibration
- Headless Flush Mount: No protrusions, ideal for precision machinery, rotating parts and compact hardware fixtures
- Precision-Machined Threads: Seamless tight fit with tapped holes, resists loosening under constant vibration and heavy load
- Versatile Metric Sizes: M3/M4/M5 – the most commonly used sizes for industrial machinery, mechanical parts and hardware fixing
- Industrial-Grade Construction: Engineered for professional use, suitable for long-term continuous operation in harsh industrial settings
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