S-92198A272 1 1/4"-7 x 7" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration
• Rockwell B70 hardness provides superior durability and resistance to wear and deformation
• Coarse UNC threading with Class 2A fit enables faster assembly and better tolerance for minor misalignments
• External hex drive and large 1 7/8" head allows for high-torque installation with standard tools
• Partial threading design optimizes grip strength while reducing material usage and weight
• Full compliance with ASME B18.2.1 guarantees dimensional accuracy and interchangeability

Professional Applications & Engineering Value

This heavy-duty 1 1/4"-7 UNC hex head screw delivers critical engineering solutions for demanding applications. The 18-8 stainless steel composition provides excellent corrosion resistance in chemical processing, marine, and food industry environments where moisture exposure is constant. The coarse thread pitch and Class 2A thread fit significantly reduce cross-threading risks during high-volume assembly operations, while the external hex drive accommodates high torque requirements for structural connections. With 80,000 psi tensile strength and Rockwell B70 hardness, this screw maintains integrity in heavy machinery, construction frameworks, and transportation equipment where vibration resistance is paramount. The partial threading design concentrates thread engagement where clamping force is most needed, optimizing both performance and material efficiency.

Specification Summary & Compliance

This 1 1/4"-7 UNC hex head screw features precise Class 2A thread fit tolerances according to Unified Thread Standard specifications. Manufacturing strictly adheres to ASME B18.2.1 dimensional requirements, ensuring consistent performance and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, making it suitable for global industrial supply chains and environmentally conscious operations.