M30405

Frequently Asked Questions

Q: What material and grade is the M30405 lockwasher?
A: The M30405 is an industrial-grade split lockwasher manufactured from grade 5 carbon steel, compliant with ASTM A29. It features a phosphate coating for corrosion resistance. Hardness ranges from Rockwell C35 to C45, providing the strength needed for high-load fastener applications.

Q: What is the purpose of the M30405 lockwasher in pallet jack assemblies?
A: The M30405 split lockwasher is designed to secure high-load fastener assemblies on manual pallet jack platforms and axle assemblies. The split design creates spring tension that resists fastener loosening under vibration and repeated loading during normal material handling operations.

Q: Is the M30405 suitable for wet or corrosive environments?
A: Yes. The phosphate coating on the M30405 provides corrosion resistance suitable for warehouse, dock, and cold storage environments. However, in extreme corrosion conditions (salt spray or outdoor storage), stainless steel lockwashers may provide superior long-term protection.

Q: How does the split design of the M30405 prevent fastener loosening?
A: The M30405 split lockwasher has a gap and curved profile that creates resilient spring action. When assembled under a fastener, this spring tension continuously pushes back against fastener rotation and vibration, helping to prevent self-loosening that can occur with standard flat washers.

Q: What is the typical service life of the M30405 lockwasher?
A: Grade 5 carbon steel split lockwashers with phosphate coating typically remain effective for 5-7 years in standard warehouse environments. Service life depends on usage frequency, vibration intensity, and environmental conditions. Inspect fastener assemblies periodically for tightness and replace lockwashers if they become permanently deformed.