S-90401A242 10-24 x 1/2" Hex Head Screws with Lock Washer

Key Features & Benefits at a Glance

• Enhanced vibration resistance with integrated external-tooth lock washer, preventing loosening in high-motion environments
• Superior corrosion protection through zinc-plated steel construction, extending service life in harsh industrial settings
• High-strength performance with 60,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Quick installation efficiency via coarse UNC threading and external hex drive, reducing assembly time
• Precise thread engagement with Class 2A fit, ensuring reliable fastening without cross-threading risks
• Full-thread coverage along the 1/2" length, maximizing grip strength across the entire fastened material
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial use

Professional Applications & Engineering Value

Engineered for vibration-prone industrial assemblies, these 10-24 UNC coarse thread hex head screws solve critical loosening issues in machinery, automotive, and electrical enclosures. The zinc-plated steel base material combined with external-tooth lock washers creates a dual-defense system: the plating resists environmental corrosion while the washer teeth bite into mating surfaces, maintaining clamp force under dynamic loads. With 60,000 psi tensile strength and Rockwell B70 hardness, they withstand high stress without thread deformation. The coarse threading enables rapid installation in various materials, reducing production downtime while the fully threaded design ensures consistent holding power across the entire 1/2" length.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances with UNC coarse thread profile (10-24 size, 0.19" diameter). Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations. Features external-tooth lock washer (0.381" OD, 0.024" thickness) integrated with zinc-plated steel hex head screw for unified performance.