S-90969A290 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity: With a tensile strength of 140,000 psi, this shoulder screw reliably handles high-stress applications without failure.
• Superior Corrosion Resistance: The black oxide finish provides durable protection against rust and wear in harsh industrial environments.
• Precise Thread Engagement: Class 3A thread fit ensures tight, secure fastening with minimal risk of loosening under vibration.
• Easy Installation & Removal: The ultra-low socket head with hex drive allows for efficient tool access in confined spaces.
• Enhanced Grip & Alignment: Knurled head texture improves handling during assembly, while the shoulder provides accurate component positioning.
• High Durability: Made from alloy steel with Rockwell C30 hardness, it offers long-lasting performance under repetitive use.
• Regulatory Compliance: Meets RoHS 3 and REACH standards, ensuring safe use in regulated industries.

Professional Applications & Engineering Value

This 5/16"-18 UNC shoulder screw is engineered to address critical alignment and load distribution challenges in industrial machinery, automation systems, and precision equipment. The alloy steel construction, combined with a black oxide finish, resists corrosion and extends service life in demanding environments. Its ultra-low socket head and knurled texture facilitate quick installation in tight spaces, reducing assembly time. The coarse UNC threads and Class 3A fit provide reliable fastening that withstands vibrations, making it ideal for high-tensile applications where precision and durability are paramount.

Specification Summary & Compliance

This shoulder screw features a 5/16"-18 UNC thread with Class 3A fit for precise tolerance, a shoulder diameter of 3/8" with tight tolerance control, and a thread length of 1/2". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial use.