S-92965A544 1/4"-20 x 1 1/4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength, ideal for high-stress industrial applications
• Superior corrosion resistance thanks to the black oxide finish, extending service life in harsh environments
• Reliable fastening performance with UNC coarse thread spacing and Class 2A fit, ensuring secure connections
• Optimized for high-torque installation featuring an external hex drive and hex head design for easy wrench access
• Enhanced durability and wear resistance from Rockwell C25 hardness, maintaining integrity under repeated use
• Versatile partial threading allowing for precise clamping force control in assembly operations
• Compliance with major industry standards including ASME B18.2.1 and RoHS 3, guaranteeing quality and safety

Professional Applications & Engineering Value

This Grade 5 hex head screw is engineered to address critical challenges in heavy-duty mechanical and structural assemblies. The black oxide finish provides a protective layer against oxidation and mild corrosion, making it suitable for automotive, machinery, and construction applications where environmental exposure is a concern. Its UNC coarse thread with Class 2A fit ensures quick installation and vibration resistance, reducing the risk of loosening in dynamic loads. The partially threaded design allows the unthreaded shank to bear shear loads effectively, while the external hex drive facilitates high-torque tightening with standard tools. With a 1-1/4" length and right-hand thread, it offers versatility in securing components where strength and reliability are paramount, supported by compliance with ASME B18.2.1 and SAE J429 specifications for consistent performance.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent assembly and UNC coarse thread spacing with a size of 1/4"-20. It meets ASME B18.2.1 and SAE J429 manufacturing specifications, ensuring reliability in industrial use. The product is RoHS 3 (2015/863/EU) Compliant, confirming it is free from hazardous substances, and is manufactured from steel with a black oxide finish for enhanced durability and corrosion resistance.