S-91247A486 3/4"-16 x 5 1/2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc plating extends service life and maintains integrity in harsh industrial environments.
• High-strength Grade 5 classification provides dependable load-bearing capacity for critical fastening needs.
• Fine UNF threading with Class 2A fit offers precise engagement and vibration resistance, minimizing loosening over time.
• External hex drive design allows for easy installation and removal with standard tools, improving assembly efficiency.
• Partially threaded shank enables optimal clamping force distribution, ideal for materials requiring specific grip lengths.
• Full compliance with industry standards including ASME B18.2.1 and SAE J429 guarantees consistent quality and interchangeability.

Professional Applications & Engineering Value

This 3/4"-16 UNF hex head screw is engineered to address common industrial challenges such as joint integrity and environmental durability. The zinc plated steel construction combats corrosion in settings like manufacturing plants, construction sites, and machinery assembly, where exposure to moisture and chemicals is frequent. Its Grade 5 strength rating and fine thread spacing provide superior resistance to vibrational loosening and dynamic loads, making it a trusted choice for structural frameworks, heavy equipment, and automotive components. By incorporating external hex drive and partial threading, it ensures quick installation and precise clamping, reducing assembly time while maintaining high performance in industrial applications.

Specification Summary & Compliance

This fastener adheres to Class 2A thread fit tolerances for consistent engagement and meets ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are upheld. The product features a right-hand thread direction and UNF thread type, with a minimum thread length of 1 3/4" and overall length of 5 1/2", designed for reliable performance in standardized inch fasteners systems.