S-91465A110 1/4"-20 x 2" ASTM A307 Square Head Screws

Key Features & Benefits at a Glance

• High tensile strength of 60,000 PSI ensures reliable performance in demanding industrial environments, reducing the risk of fastener failure.
• ASTM A307 Grade A steel construction provides excellent durability and resistance to wear, extending service life in heavy-duty applications.
• UNC coarse threading with Class 2A fit allows for quick assembly and disassembly, minimizing installation time and labor costs.
• External square drive design offers superior torque transmission, preventing slippage and ensuring secure fastening with standard tools.
• Partially threaded shank with 3/4" minimum thread length provides optimal grip and clamping force where needed, enhancing joint stability.
• RoHS 3 compliance guarantees environmental safety and regulatory adherence, making it suitable for global supply chains.
• Rockwell B69 hardness rating maintains structural integrity under stress, reducing deformation in high-vibration settings.

Professional Applications & Engineering Value

This 1/4"-20 UNC square head screw is engineered to address common industrial challenges, such as loosening under dynamic loads and corrosion in harsh conditions. Crafted from ASTM Grade A steel, it delivers robust tensile strength and consistent performance in machinery, construction, and automotive assemblies. The coarse thread spacing and Class 2A thread fit facilitate rapid installation in materials like metal and wood, while the external square drive ensures efficient torque application without cam-out. Ideal for applications requiring partially threaded designs, it provides precise clamping where full threading isn't necessary, reducing material stress and improving longevity in heavy-duty fastening scenarios.

Specification Summary & Compliance

This screw adheres to Unified Standard Class 2A thread tolerances for precise fit and interchangeability. It meets ASTM A307 specifications for low-carbon steel fasteners, ensuring consistent quality and performance. Compliance with RoHS 3 (2015/863/EU) confirms it is free from hazardous substances, supporting environmental regulations. Key dimensions include a 1/4"-20 UNC coarse thread, 2" length, and 3/4" minimum thread length, all manufactured to industrial standards for reliability in various applications.