S-95030A510 1/4"-20 Locknuts

Key Features & Benefits at a Glance

• Vibration-proof locking through integrated cotter pin slot design prevents accidental loosening in high-stress environments
• Heavy-duty steel construction ensures exceptional strength and durability for demanding industrial applications
• Precision Class 2B thread fit guarantees smooth installation and reliable engagement with mating components
• Standard external hex drive enables easy installation and removal with common wrench tools
• UNC coarse threading provides faster assembly and superior resistance to cross-threading compared to fine threads
• Full regulatory compliance with RoHS 3 and REACH standards ensures environmental responsibility and global market acceptance
• Optimized slot dimensions (0.072" depth, 0.07" width) accommodate standard 1/16" cotter pins for secure fastening

Professional Applications & Engineering Value

This steel castle locknut with cotter pin locking mechanism delivers critical safety assurance in vibration-prone applications where fastener failure could lead to catastrophic equipment damage or safety hazards. The UNC coarse thread profile combined with Class 2B thread fit ensures reliable performance in heavy machinery, agricultural equipment, automotive suspensions, and industrial manufacturing systems. The external hex drive allows for high-torque installation while the precisely machined slot maintains structural integrity for the cotter pin, creating a positive mechanical lock that withstands extreme operational vibrations. Engineered for applications requiring fail-safe fastening solutions, this castle locknut provides permanent security without compromising disassembly accessibility when maintenance is required.

Specification Summary & Compliance

This 1/4"-20 UNC castle locknut features Class 2B thread fit tolerances ensuring precise engagement with mating components. The coarse thread spacing and right-hand thread direction follow standardized industrial specifications. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the absence of restricted hazardous substances. Critical dimensions include 7/16" hex width and 7/32" height with cotter pin slot engineered to accommodate standard 1/16" diameter pins with minimum slot depth of 0.072" and width of 0.07" for reliable locking performance.