S-91286A455 3/4"-10 x 2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with 150,000 psi tensile strength and Grade 8 classification for reliable performance in high-stress applications.
• Superior corrosion resistance provided by the zinc-flake coating, extending service life in harsh industrial environments.
• Optimal thread engagement and fast assembly due to UNC coarse threads and Class 2A fit, reducing installation time and improving connection security.
• High durability and wear resistance from Rockwell C33 hardness, ensuring the screw maintains integrity under repetitive or heavy use.
• Easy installation and removal with an external hex drive and 1 1/8" head width, allowing for standard tool compatibility and efficient maintenance.
• Full threading for maximum grip across the entire 2" length, providing consistent holding power in various material thicknesses.
• Compliance with major industry standards including ASME B18.2.1 and SAE J429, guaranteeing interoperability and safety in regulated settings.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where high tensile strength and corrosion resistance are paramount. The steel material combined with a zinc-flake coating protects against rust and chemical exposure, reducing maintenance costs and downtime. Its 3/4"-10 UNC coarse threads and Class 2A thread fit ensure precise, secure fastening in coarse-grained materials, preventing loosening under vibration. Ideal for structural frames, engine components, and industrial equipment, this fully threaded screw offers uniform stress distribution and reliable performance in demanding industrial applications, supported by compliance with ASME and SAE specifications for consistent quality.

Specification Summary & Compliance

This screw features a 3/4"-10 UNC coarse thread with Class 2A thread fit for standard tolerance and easy assembly. It meets ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and performance reliability. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for industrial use.