S-92311A351 5/8"-11 x 7/8" 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 extended service life
• Exceptional holding power ensured by the Class 3A thread fit, providing a precise, secure, and vibration-resistant fastening
• High mechanical strength and durability from Rockwell B80 hardness, resisting deformation under heavy loads
• Easy and secure installation with the 5/16" hex drive, allowing for high torque application without head protrusion
• Effective surface grip and minimal component damage due to the cup tip design, perfect for permanent positioning
• Reliable and standardized performance meeting ASME B18.3 specifications, ensuring interchangeability and quality
• Safe for regulated industries with full compliance to RoHS 3 and REACH environmental standards

Professional Applications & Engineering Value

This 5/8"-11 UNC hex headless set screw is engineered to address critical challenges in industrial assembly and machinery. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it suitable for applications in moist or chemically aggressive environments, such as food processing equipment, marine hardware, and outdoor machinery. The Class 3A thread fit and coarse thread spacing deliver a tight, reliable grip that minimizes the risk of loosening under vibration, a common issue in dynamic systems like motors, pulleys, and rotating shafts. The headless design with a hex drive allows for flush mounting in confined spaces, while the cup tip concentrates pressure to securely lock components like gears and collars without causing significant surface damage. This combination of features ensures long-term, maintenance-free performance in heavy-duty set screw applications, enhancing operational reliability and reducing downtime.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, featuring a 5/8"-11 UNC thread with Class 3A thread fit for high accuracy and a coarse thread spacing. It is manufactured in compliance with ASME B18.3 specifications, ensuring consistent quality and performance. The product is also confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.