S-8077A512 3-48 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 a protective layer that reduces galling and extends service life.
• High-strength performance with 70,000 psi tensile strength and 35,000 psi shear strength, ensuring reliable fastening under significant mechanical stress.
• Precise alignment and smooth rotation due to the Class 3A thread fit and standard shoulder, minimizing play and improving assembly accuracy.
• Secure, non-slip installation with a knurled hex socket head and 5/64" drive, allowing for high torque application without stripping.
• Excellent hardness and toughness rated at Rockwell B79, providing resistance to deformation in demanding applications.
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe use in regulated industries.

Professional Applications & Engineering Value

This 3-48 UNC shoulder screw is engineered to address critical challenges in precision assemblies where alignment, corrosion resistance, and high strength are paramount. The 316 stainless steel material offers exceptional resistance to corrosive elements, making it suitable for marine, chemical processing, and food industry equipment. The black oxide finish not only enhances corrosion protection but also reduces friction during installation, preventing seizing. The hex socket head with knurling ensures a firm grip for high-torque applications, while the Class 3A thread fit and standardized shoulder provide exact positioning in machinery, jigs, and pivoting mechanisms, reducing wear and maintenance costs. Ideal for use in industrial automation, aerospace components, and medical devices, this screw delivers reliable performance in environments demanding durability and precision.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a Class 3A thread fit for precise, secure fastening. Dimensions include a thread size of 3-48, head diameter of 0.25", and shoulder diameter of 1/8" with tight tolerances (e.g., shoulder diameter tolerance of -0.004" to -0.002"). It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for global industrial applications requiring environmental and safety standards.