S-90429A152 1"-8 x 7" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from the black-oxide finish, ideal for harsh industrial environments.
• Superior load-bearing capability with a high 130,000 psi tensile strength for demanding applications.
• Reliable, vibration-resistant fastening ensured by the Class 3A thread fit and coarse UNC threading.
• High-torque installation and removal facilitated by the large 5/8" hex drive.
• Optimized for flush mounting with a standard flat head profile and 82° countersink angle.
• Enhanced durability and wear resistance provided by the alloy steel construction and Rockwell C37 hardness.
• Guaranteed quality and safety compliance meeting ASME B18.3, ASTM F835, RoHS 3, and REACH standards.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel Flat Head Screw is engineered to solve critical challenges in heavy machinery, structural steelwork, and large-scale assembly. The 1"-8 UNC coarse thread and Class 3A fit provide excellent engagement and vibration resistance in wood, metal, and composite materials, preventing loosening under dynamic loads. The partially threaded design allows for effective clamping, while the black-oxide surface treatment significantly enhances corrosion resistance, extending service life in outdoor or chemically aggressive environments. Its high tensile strength and robust hex drive make it a reliable choice for applications demanding both superior mechanical performance and long-term reliability.

Specification Summary & Compliance

This screw features a 1"-8 UNC coarse thread with a precision Class 3A thread fit and a minimum thread length of 2 1/2". It is manufactured from alloy steel to meet ASME B18.3 and ASTM F835 specifications. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it adheres to strict environmental and safety regulations for industrial use.