S-91268A132 1 1/8"-7 x 10" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum Load-Bearing Capacity: Grade 8 classification and 150,000 psi tensile strength ensure reliable performance under extreme stress, reducing the risk of fastener failure in critical applications.
• Superior Wear Resistance: Rockwell C33 hardness provides excellent durability and resistance to deformation, extending service life in high-vibration environments.
• Optimized Thread Engagement: Coarse 1 1/8"-7 UNC threads with Class 2A fit enable faster installation and better resistance to loosening in structural and machinery applications.
• Secure Torque Application: External hex drive with 1 11/16" head width offers superior grip for high-torque tightening with standard tools, preventing stripping.
• Enhanced Design Flexibility: Partial threading allows for both clamped joint security and adjustable positioning in assemblies requiring precise gap control.
• Rigorous Quality Assurance: Manufactured to ASME B18.2.1 and SAE J429 specifications, guaranteeing dimensional consistency and interchangeability.
• Environmental Compliance: Meets RoHS 3 and REACH regulations, ensuring safe use in regulated industries and international markets.

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver exceptional engineering value in demanding industrial settings where failure is not an option. The high-strength steel construction, combined with Rockwell C33 hardness, directly addresses common challenges in heavy machinery, construction, and structural steel applications where vibration-induced loosening and material fatigue are major concerns. The coarse UNC threading provides superior performance in softer materials and faster assembly times, while the partial threading design allows engineers to create precisely clamped connections without compromising adjustability. Meeting ASME B18.2.1 and SAE J429 standards ensures these fasteners provide reliable, consistent performance in critical load-bearing applications, from industrial equipment manufacturing to infrastructure projects requiring 150,000 psi tensile strength assurance.

Specification Summary & Compliance

This 10-inch heavy-duty fastener features precise Class 2A thread fit with 1 1/8"-7 UNC coarse threading and partial threading with minimum 2 3/4" thread length. Manufactured to ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and performance reliability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring unrestricted use across global markets.