S-91257A865 3/4"-10 x 9 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with Grade 8 classification, providing reliable performance under high-stress conditions and a tensile strength of 150,000 psi.
• Superior corrosion resistance due to the zinc yellow-chromate plating, extending service life in harsh industrial environments.
• High hardness rating of Rockwell C33 ensures resistance to wear and deformation, maintaining fastener integrity over time.
• Precise thread fit with Class 2A and UNC coarse threading, offering easy installation and secure fastening in various materials.
• Optimized for heavy-duty applications featuring a 9 1/2" length and partial threading, ideal for structural and machinery assemblies.
• Compliance with industry standards including ASME B18.2.1 and SAE J429, ensuring consistent quality and reliability.
• Environmental and safety adherence with RoHS 3 and REACH compliance, making it suitable for regulated industrial sectors.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in demanding industrial settings, such as heavy machinery, construction, and automotive assemblies. The steel material combined with a zinc yellow-chromate finish provides robust protection against corrosion and oxidation, reducing maintenance needs and downtime. With a 3/4"-10 UNC coarse thread and partial threading, it ensures efficient load distribution and secure fastening in high-vibration environments. The external hex drive design allows for straightforward installation using standard tools, enhancing workflow efficiency. Ideal for applications requiring high tensile strength and durability, this fastener supports long-term structural integrity and performance in sectors like manufacturing, infrastructure, and equipment maintenance.

Specification Summary & Compliance

This hex head screw adheres to precise dimensional standards, including Class 2A thread fit and UNC coarse threading with a thread size of 3/4"-10. It meets manufacturing specifications under ASME B18.2.1 and SAE J429, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and safety-focused industrial applications.