S-8077A721 8-32 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 316 stainless steel construction and black oxide finish, ideal for harsh industrial environments.
• High-strength performance offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications.
• Precise thread engagement with UNC coarse threading and Class 3A fit, ensuring reliable, vibration-resistant fastening.
• Secure and easy installation featuring a knurled socket head with 3/32" hex drive for improved grip and torque application.
• Accurate shoulder positioning with controlled diameter and length tolerances for consistent alignment in assemblies.
• Durable material hardness at Rockwell B79, providing excellent wear resistance and long service life.
• Compliance with environmental standards, meeting RoHS 3 and REACH regulations for safe and sustainable use.

Professional Applications & Engineering Value

This 8-32 UNC thread shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and industrial equipment. The 316 stainless steel material, combined with a black oxide finish, delivers superior resistance to corrosion, chemicals, and moisture, making it suitable for outdoor, marine, or chemical processing applications. The Class 3A thread fit and coarse UNC threading provide secure, vibration-resistant connections, reducing the risk of loosening under dynamic loads. The knurled socket head with hex drive allows for efficient installation in confined spaces, while the precisely machined shoulder ensures accurate component alignment and spacing. Ideal for use in pivots, bearings, and rotating assemblies, this screw enhances operational reliability and reduces maintenance needs in industrial shoulder screw applications.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit with UNC coarse threading (8-32 size), ensuring high precision and interchangeability. Key dimensional tolerances include shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005" for consistent performance. Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets stringent environmental and safety standards for industrial use.