S-93516A111 1/4"-20 x 7/8" ASME B18.2.1 Bronze Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance for extended service life in harsh marine and industrial environments
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and stress
• Rockwell B70 hardness provides excellent durability and resistance to wear and deformation
• Class 2A thread fit offers consistent, reliable assembly with standard UNC coarse threading
• External hex drive design enables secure, high-torque installation with common tools
• Full UNC threading along the entire 7/8" length maximizes grip and holding power
• Compliance with major standards including ASME B18.2.1, RoHS 3, and REACH for quality assurance

Professional Applications & Engineering Value

This 651 Silicon Bronze hex head screw delivers exceptional engineering value in demanding applications where corrosion resistance and mechanical strength are critical. The silicon bronze composition provides outstanding protection against saltwater corrosion and chemical exposure, making it ideal for marine hardware, offshore equipment, and industrial machinery operating in corrosive environments. The UNC coarse thread design ensures rapid installation and superior vibration resistance, while the external hex drive accommodates high-torque applications without stripping. With full threading along its entire length, this fastener maximizes engagement surface area for enhanced load distribution and structural integrity in heavy-duty assemblies.

Specification Summary & Compliance

This 1/4"-20 x 7/8" hex head screw features precision UNC coarse threading with Class 2A thread fit tolerance for consistent mating with standard nuts and threaded components. Manufactured to ASME B18.2.1 specifications for dimensional accuracy and mechanical properties, the fastener also complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries and international markets.