S-97768A369 1/4"-20 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for heavy-duty applications.
• Precise Class 3A thread fit ensures tight tolerances and reliable fastening in critical assemblies.
• Knurled hex socket head provides enhanced grip and easy installation with standard tools.
• Coarse UNC threading allows for quick assembly and disassembly, reducing labor time.
• Durable Rockwell B55 hardness maintains structural integrity under repeated stress and vibration.
• Comprehensive compliance with ASME B18.3, RoHS 3, and REACH standards for safe, regulated use.

Professional Applications & Engineering Value

This shoulder screw is engineered to address common industrial challenges such as misalignment, wear, and corrosion in machinery. The 18-8 stainless steel material combined with a black oxide finish provides excellent resistance to rust and chemicals, extending service life in demanding settings like automotive assemblies, conveyor systems, and precision equipment. The UNC coarse thread and Class 3A fit ensure secure, vibration-resistant connections, while the knurled hex socket head facilitates easy maintenance. Ideal for applications requiring a sturdy shoulder to act as a pivot or spacer, this screw enhances operational reliability and reduces downtime in industrial shoulder bolt uses.

Specification Summary & Compliance

The screw features precise dimensions including a 1/4"-20 UNC thread with Class 3A fit for accurate engagement, and tolerances such as shoulder diameter of -0.004" to -0.002". It meets ASME B18.3 specifications for consistency and performance, and is compliant with RoHS 3 and REACH regulations, ensuring environmental safety and suitability for global industrial markets.