S-94383A490 3/8"-16 ASME B18.3, ASTM A574 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with alloy steel construction and Rockwell C32 hardness, supporting heavy-duty applications without deformation
• Superior corrosion resistance from the black oxide finish, extending service life in harsh industrial environments
• Precise alignment and smooth rotation due to the 2" shoulder with tight diameter tolerance, reducing wear in assemblies
• Reliable thread engagement with Class 3A UNC coarse threads, ensuring secure fastening and vibration resistance
• Easy installation and removal using the 1/4" hex drive and knurled head, providing excellent grip and torque application
• High load capacity with 140,000 psi tensile and 84,000 psi shear strength, ideal for demanding mechanical systems
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence

Professional Applications & Engineering Value

This shoulder screw is engineered to address common industrial challenges such as misalignment, component wear, and fastener failure in high-stress environments. The alloy steel material, combined with a black oxide finish, provides robust resistance to corrosion and mechanical stress, making it suitable for machinery, automotive, and precision equipment. The 3/8"-16 UNC thread with Class 3A fit ensures tight, reliable connections that withstand vibrations, while the 2" shoulder length offers stable support for rotating parts like bearings and pulleys. This design minimizes maintenance needs and enhances operational efficiency in industrial applications, delivering long-term value and performance consistency.

Specification Summary & Compliance

The screw features precise dimensional tolerances, including a shoulder diameter of 1/2" with a tolerance of -0.004" to -0.002" and shoulder length of 2" with -0.005" to 0.005" tolerance, ensuring accurate fits. Thread specifications adhere to UNC coarse thread standards with Class 3A fit for superior engagement. Manufactured in compliance with ASME B18.3 and meeting RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, this product guarantees environmental safety and industry conformity.