S-97345A517 1/4"-28 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial and marine environments
• Enhanced precision alignment through Class 3A thread fit, ensuring tight tolerances and reduced vibration in assemblies
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength for demanding mechanical applications
• Secure, non-slip fastening thanks to the knurled socket head and 5/32" hex drive, allowing for reliable torque application
• Optimized for fine-thread applications with 1/4"-28 UNF right-hand threads, providing superior holding power in thin materials
• Durable, long-lasting operation backed by Rockwell B79 hardness, resisting wear and deformation under load
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for safe, global industrial use

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, such as misalignment and component wear. The Class 3A thread fit and fine 1/4"-28 UNF threads ensure exact positioning in assemblies, reducing the risk of loosening under dynamic loads. The knurled socket head design enhances grip during installation, while the 5/32" hex drive allows for efficient torque application in confined spaces. Ideal for use in industrial automation, robotics, and aerospace systems, this fastener provides reliable performance in high-stress environments where corrosion resistance and dimensional stability are paramount. Its shoulder diameter and length tolerances support precise bearing and pivot applications, minimizing maintenance needs.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit for high-precision applications, with thread specifications of 1/4"-28 UNF and a right-hand thread direction. Manufacturing conforms to ASME B18.3 standards, ensuring consistent quality and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material restrictions adherence. Dimensional tolerances include a shoulder diameter of -0.004" to -0.002" and shoulder length of -0.005" to 0.005", supporting reliable performance in engineered systems.