DN20 Lock Nut for Roller Screw，5Pack M20 x 2.5 Hex Nut, 42CrMo Steel, 6H Precision, Phosphated and Lubricated Anti Backlash, Copper Setscrew Included

Premium Lock Nut for Roller Screw Systems This DN20 lock nut is designed for high-performance roller screw assemblies, offering zero backlash, high rigidity, and long service life.balances strength and machinability, while the phosphate coating and pre-lubrication enhance corrosion resistance and smooth operation. Key Advantages Copper Setscrew Design: The integrated soft copper locking screw prevents loosening under vibration, protecting your roller screw threads from damage. Hexagonal Shape: Fits standard wrenches for easy installation in tight spaces. Ultra-Precise Threads: 6H tolerance guarantees consistent fit with M20×2.5 roller screws (ideal for micro-adjustments). Low Runout Tolerance: Ensures even load distribution and reduces wear on screw assemblies. Applications  CNC machinery, linear actuators, and servo drives 3D printers, optical stages, and automation systems

• Precision Engineered：Made from 42CrMo alloy steel (HRC 24-28°) for durability and wear resistance; 6H precision threads (M20×2.5) ensure smooth engagement with roller screws, minimizing backlash; Extremely low end-face runout (0.002-0.005mm) for stable axial positioning in high-accuracy applications.
• Secure Anti-Loosening：Built-in copper setscrew provides extra locking force without damaging screw threads; Hexagonal shape allows easy tightening with standard wrenches (prevents rotation slippage).
• Corrosion & Wear Resistant：Phosphate coating + lubrication reduces friction and resists rust in harsh environments; Ideal for CNC machines, 3D printers, robotics, and industrial automation.
• Multiple sizes available (M3-M40) contact us for custom requirements
• Reliable Support：We are dedicated to delivering quality service throughout your purchasing experience. Should you have any inquiries, please do not hesitate to contact us. We guarantee a response within 24 hours