S-91259A141 3/4"-10 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional durability with Alloy Steel construction and Rockwell C32 hardness for long-lasting performance in high-stress environments
• Precise alignment capabilities through the 1" diameter shoulder with tight tolerance control for accurate component positioning
• Superior corrosion resistance provided by the black oxide finish, extending service life in demanding industrial conditions
• High load-bearing capacity with 140,000 psi tensile strength and 84,000 psi minimum shear strength for heavy-duty applications
• Reliable thread engagement ensured by Class 3A thread fit and UNC coarse threading for secure fastening in vibration-prone settings
• Easy installation and removal facilitated by the knurled socket head with 1/2" hex drive for improved tool grip and torque application
• Industry compliance assurance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

This high-strength shoulder screw delivers critical engineering solutions for precision machinery and heavy industrial equipment. The alloy steel construction with black oxide finish provides exceptional corrosion resistance while maintaining dimensional stability under extreme loads. The 1" shoulder diameter with precise tolerances ensures accurate alignment in rotating assemblies, pivot points, and bearing applications, eliminating the need for additional spacing components. The 3/4"-10 UNC Class 3A threads offer superior engagement in coarse threading applications where vibration resistance is paramount. With 140,000 psi tensile strength and Rockwell C32 hardness, this shoulder screw withstands the demanding conditions of automotive manufacturing, industrial machinery, and precision equipment where failure is not an option. The knurled socket head with 1/2" hex drive ensures secure tool engagement during installation in confined spaces.

Specification Summary & Compliance

This shoulder screw features precision Class 3A thread fit with 3/4"-10 UNC coarse threading and maintains tight dimensional control with shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". Manufactured to ASME B18.3 specifications using ASTM A574 alloy steel, the component ensures consistent performance and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications with strict material restrictions.