S-94035A303 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
• Exceptional strength and durability with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty, high-stress applications.
• Precise component alignment ensured by the accurately machined shoulder with a tight diameter tolerance of -0.001" to 0".
• Reliable and secure fastening provided by the Class 2A UNC coarse thread fit, reducing the risk of cross-threading.
• Easy installation and removal with a standard hex socket head and 5/32" drive, allowing for high torque application in confined spaces.
• Compliance with stringent regulations, including RoHS 3 and REACH, ensuring environmental safety and material reliability.
• Versatile right-hand thread design with a 1/4"-20 UNC thread, compatible with standard components for broad industrial use.

Professional Applications & Engineering Value

This 1/4-20 UNC shoulder screw is engineered to address critical challenges in precision assembly and machinery. The 18-8 stainless steel material, combined with a passivated finish, offers excellent resistance to corrosion and wear, making it suitable for applications in automotive, aerospace, and manufacturing equipment where exposure to moisture and chemicals is common. The 5/16" shoulder diameter with precise tolerances ensures accurate alignment of moving parts, reducing vibration and wear in pivots, gears, and linkages. Its socket head design allows for efficient installation in tight spaces, while the 70,000 psi tensile strength supports heavy loads without failure. Ideal for use in robotic arms, conveyor systems, and precision instruments, this screw enhances operational reliability and longevity in demanding industrial shoulder screw applications.

Specification Summary & Compliance

This shoulder screw features a Class 2A thread fit with UNC coarse threads for reliable engagement, and a shoulder diameter tolerance of -0.001" to 0" for precise fits. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards. Manufactured to high precision, it meets common industrial requirements for heavy-duty shoulder bolts without additional certifications like ASME specified.