S-8077A761 1/2"-13 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 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 reliable, heavy-duty load-bearing applications.
• Precise Class 3A thread fit ensures secure, vibration-resistant fastening with 1/2"-13 UNC coarse threads for quick assembly.
• Accurate shoulder alignment with controlled diameter and length tolerances, providing stable pivoting and spacing in machinery.
• Easy installation and removal thanks to the hex socket drive and knurled head, enhancing grip and torque application.
• High durability and hardness rated at Rockwell B79, reducing wear and extending service life in demanding conditions.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial settings, such as misalignment and corrosion-induced failure. The black oxide finish enhances corrosion resistance, making it suitable for moist or chemical-exposed environments. With a 1/2"-13 UNC coarse thread and Class 3A fit, it provides reliable, vibration-resistant connections in assemblies requiring repeated adjustments. The precise shoulder diameter and length facilitate accurate component spacing and rotational movement in machinery, reducing downtime. Ideal for heavy-duty applications like automotive, aerospace, and manufacturing equipment, this screw ensures long-term performance and minimizes maintenance needs, backed by high tensile and shear strength.

Specification Summary & Compliance

This shoulder screw features a 1/2"-13 UNC coarse thread with Class 3A fit for precise threading, and shoulder dimensions including a 5/8" diameter and 3 3/4" length with tight tolerances. It meets ASME B18.3 specifications for dimensional accuracy and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance adherence in industrial use.