S-8077A379 10-32 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure
• Enhanced durability and wear resistance from the black oxide finish, providing long-lasting performance and reduced maintenance
• Precise alignment and secure component positioning with a 2-1/2" shoulder length and standard shoulder fit for consistent assembly
• High-strength fastening offering 70,000 psi tensile strength and 35,000 psi shear strength for demanding mechanical applications
• Reliable, fine-thread engagement with 10-32 UNF threads and Class 3A fit, ensuring vibration resistance and leak-free connections
• Easy installation and removal using a standard 1/8" hex drive and knurled socket head for improved grip and torque application
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw with a black oxide finish is engineered to address critical challenges in precision machinery, automation systems, and industrial equipment. The 10-32 UNF fine thread and Class 3A fit provide exceptional thread engagement, minimizing the risk of loosening under vibration and ensuring reliable performance in dynamic assemblies. The 2-1/2" shoulder length offers precise alignment for rotating components like gears and pulleys, reducing wear and extending service life. With a Rockwell B79 hardness and high tensile strength, it withstands heavy loads and harsh conditions, making it ideal for applications in manufacturing, aerospace, and marine environments where corrosion resistance and durability are paramount.

Specification Summary & Compliance

This shoulder screw features a 10-32 UNF fine thread with Class 3A fit for tight tolerances and reliable fastening. Key dimensions include a shoulder diameter of 1/4" with tolerance from -0.004" to -0.002", and shoulder length of 2-1/2" with tolerance from -0.005" to 0.005". It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.