S-91829A503 3/8"-16 NASM51575 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
• Precise alignment and reduced wear due to the exact 1/2" shoulder diameter with minimal tolerance for secure component positioning
• Reliable thread engagement with Class 2A UNC coarse threads ensuring consistent fastening and easy assembly
• Versatile drive options featuring both socket and slotted drive styles for flexible installation in confined spaces
• Long-term durability from the smooth head texture and right-hand thread design, minimizing galling and wear over time
• Compliance with strict industry standards including NASM51575, RoHS 3, and REACH for safe, regulated use in global markets

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial settings. The 18-8 stainless steel material, enhanced by a passivated finish, provides excellent resistance to corrosion and oxidation, making it suitable for machinery, automotive assemblies, and electronic enclosures exposed to moisture or chemicals. The 1/2" shoulder diameter with precise tolerances ensures accurate component positioning, reducing vibration and misalignment in rotating parts like bearings, pulleys, and linkages. With a coarse thread and Class 2A fit, it offers quick installation and reliable holding power, while the combination of socket and slotted drives accommodates various tooling needs. Ideal for heavy-duty applications, this screw supports high-stress operations without compromising performance, delivering long-term reliability and reduced maintenance costs.

Specification Summary & Compliance

This shoulder screw adheres to tight dimensional standards, including a Class 2A thread fit for consistent engagement and a shoulder diameter tolerance of -0.001" to 0" for precision alignment. It conforms to UNC thread specifications (3/8"-16) and is manufactured in compliance with NASM51575. The product meets regulatory requirements such as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it is free from hazardous substances and safe for industrial use globally.