S-91247A726 1/2"-13 x 3 1/2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength for demanding applications with Grade 5 classification, 120,000 psi tensile strength, and Rockwell C25 hardness.
• Superior corrosion resistance provided by the zinc plating, extending service life in harsh industrial environments.
• Reliable and easy installation with a standard 3/4" external hex head and coarse UNC threads for quick assembly.
• Optimized load distribution and grip due to the partially threaded design and Class 2A thread fit for precise engagement.
• Proven durability in heavy-duty use, manufactured to meet ASME B18.2.1 and SAE J429 standards for consistent quality.
• Compliance with environmental and safety regulations, including RoHS 3 and REACH, ensuring safe and responsible sourcing.
• Versatile for various industrial settings with a 3 1/2" length and 1/2"-13 thread size suitable for construction and machinery.

Professional Applications & Engineering Value

This Grade 5 Hex Head Screw is engineered to address critical challenges in heavy-duty industrial applications, such as construction and machinery assembly. The zinc plated steel construction offers enhanced corrosion resistance, reducing maintenance costs and downtime in corrosive environments. With a 1/2"-13 UNC coarse thread and Class 2A thread fit, it ensures secure, vibration-resistant connections that withstand high stress. The partially threaded design allows for effective clamping in joints, while the external hex drive facilitates easy installation with standard tools. By meeting ASME B18.2.1 and SAE J429 standards, it delivers reliable performance in demanding scenarios, from structural frameworks to equipment manufacturing, ensuring long-term operational integrity.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including a Class 2A thread fit for consistent accuracy and a 1/2"-13 UNC coarse thread with a minimum thread length of 1 1/4". It is manufactured in compliance with ASME B18.2.1 and SAE J429 specifications, ensuring high-quality production. Additionally, it meets regulatory requirements such as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming its safety and environmental compliance for global industrial use.