S-8077A862 1/4"-28 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel and black oxide finish, ideal for harsh industrial environments
• Precise thread engagement with Class 3A fit and UNF fine threads, ensuring reliable fastening and vibration resistance
• High strength-to-weight ratio offering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Easy installation and adjustment with hex socket drive and knurled head for improved grip and torque application
• Accurate shoulder positioning with tight diameter and length tolerances for consistent alignment in assemblies
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance and environmental safety
• Durable material hardness at Rockwell B79, providing long-term wear resistance and reliability

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw with black oxide finish is engineered to address critical challenges in precision machinery, automotive, and aerospace assemblies. The Class 3A thread fit and UNF fine threads minimize loosening under vibration, while the knurled head and hex socket drive facilitate secure tool engagement in confined spaces. The shoulder diameter and length with tight tolerances ensure accurate component alignment, reducing wear and maintenance costs. Ideal for rotating parts, bearing mounts, and linkage systems, it combines corrosion resistance with high tensile strength to extend service life in demanding conditions.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications with Class 3A thread fit and precise shoulder dimensions (diameter tolerance: -0.004" to -0.002"; length tolerance: -0.005" to 0.005"). It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance for environmental safety, ensuring no hazardous substances in industrial use.