S-91273A217 3/8"-24 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 18-8 stainless steel, ideal for harsh industrial environments and reducing maintenance costs.
• High tensile and shear strength (70,000 psi and 35,000 psi respectively) ensures reliable performance under heavy loads and prevents mechanical failure.
• Precise, fine UNF threads (Class 2A fit) provide superior vibration resistance and secure fastening in precision assemblies.
• Knurled head and 3/16" hex socket drive offer a non-slip grip for easy installation and removal, even in tight spaces.
• Accurate shoulder dimensions with tight tolerances guarantee proper alignment and smooth rotation of mounted components.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets global industry standards for restricted substances.
• Rockwell B55 hardness provides excellent durability and wear resistance for long-term use in demanding applications.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical challenges in precision machinery and industrial equipment. Its 3/8"-24 UNF fine thread and Class 2A fit deliver superior holding power and vibration resistance, preventing loosening in dynamic systems like robotics, conveyor assemblies, and automotive fixtures. The knurled head and hex socket drive facilitate quick, secure installation with standard tools, reducing assembly time. The precisely machined shoulder ensures accurate component alignment, minimizing wear and extending service life in applications such as pivoting mechanisms, bearing mounts, and gear linkages. Built from corrosion-resistant stainless steel, it withstands exposure to moisture, chemicals, and high-stress conditions, making it a reliable choice for OEMs and maintenance teams seeking durability and compliance.

Specification Summary & Compliance

This shoulder screw adheres to UNF thread standards with a Class 2A thread fit for precise tolerance. Key dimensions include a 3/8"-24 thread size, 1/2" thread length, and shoulder diameter tolerance of -0.004" to -0.002". It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. The screw's construction supports industrial specifications with a tensile strength of 70,000 psi and shear strength of 35,000 psi, validated for reliable performance in mechanical fastening applications.