S-94705A826 1 1/8"-8 x 7" ASTM A193 Steel Heavy Hex Head Screws for High-Pressure Applications

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 125,000 psi tensile strength for reliable performance in high-stress industrial environments.
• Superior material durability from ASTM Grade B7 steel, offering excellent resistance to wear and corrosion under demanding conditions.
• Precision thread fit with Class 2A UN fine threads ensuring secure, vibration-resistant connections and reduced risk of loosening.
• Optimized grip and thread distribution with a 4 1/4" grip length and 2 3/4" partially threaded design for balanced clamping force and easier installation.
• High hardness rating of Rockwell C35 providing enhanced surface durability and resistance to deformation during tightening.
• Easy installation and removal thanks to the external hex drive and 1 13/16" head width, compatible with standard wrenches for efficient maintenance.
• Compliance with industry standards per ASTM A193, ensuring consistent quality, reliability, and suitability for regulated applications.

Professional Applications & Engineering Value

This 1 1/8"-8 hex head screw is engineered to address critical challenges in heavy-duty industrial settings, such as pressure vessels, structural assemblies, and high-temperature equipment. Made from ASTM Grade B7 steel, it provides robust resistance to stress and environmental factors, while the UN fine thread and Class 2A fit ensure precise, leak-free connections that withstand vibration and dynamic loads. The partially threaded design with a defined grip length optimizes clamping force distribution, reducing the risk of joint failure and simplifying alignment in complex installations. Ideal for applications requiring high-strength fasteners with reliable performance under ASTM A193 specifications, this screw delivers long-term durability and engineering confidence.

Specification Summary & Compliance

This screw adheres to Class 2A thread fit tolerances for consistent engagement and meets ASTM A193 specifications, ensuring material and manufacturing integrity. It features a UN fine thread (1 1/8"-8) with right-hand direction and is partially threaded for controlled fastening. Compliant with industry standards for high-strength applications, it supports requirements in sectors demanding precise mechanical performance and reliability.