S-99934A830 5/16"-18 x 1/2" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• Exceptional thread precision with Class 3A fit ensures tight, secure fastening and reduces the risk of loosening under vibration.
• High-strength performance backed by Rockwell B80 hardness, providing excellent durability and resistance to wear.
• Easy, secure installation using a 5/32" hex socket drive, allowing for high torque application without head protrusion due to the headless design.
• Reliable gripping action from the silver soft tip, which deforms slightly to prevent damage to shafts and components while maintaining a firm hold.
• Wide compatibility with coarse UNC threads (5/16"-18), facilitating quick assembly and disassembly in various industrial setups.
• Compliance with stringent standards including ASME B18.3, RoHS, and REACH, ensuring safety, quality, and environmental responsibility.

Professional Applications & Engineering Value

This 5/16"-18 UNC set screw is engineered to address critical challenges in precision assembly and machinery. Made from 18-8 Stainless Steel, it offers excellent resistance to rust and corrosion, making it suitable for applications in moist or chemical-exposed settings like automotive, aerospace, and manufacturing equipment. The headless design and hex socket drive enable flush mounting in confined spaces, while the Class 3A thread fit and coarse thread spacing ensure reliable, vibration-resistant fastening. The silver soft tip minimizes marring on shafts and gears, preserving component integrity. Ideal for securing pulleys, collars, and knobs, this set screw enhances operational safety and reduces maintenance needs in demanding industrial environments.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, including a Class 3A thread fit for high accuracy and UNC coarse threads (5/16"-18) per common industrial requirements. It meets ASME B18.3 specifications for consistency and reliability. Additionally, the product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and environmentally safe for global use.