S-92949A634 3/8"-16 x 2 1/2" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty, high-stress applications.
• Precise, reliable fastening due to Class 3A thread fit and UNC coarse threading, reducing the risk of cross-threading and ensuring secure connections.
• Easy installation and removal with a hex drive (7/32") and rounded button head design, providing excellent torque transmission and a low-profile finish.
• Full threading along the 2 1/2" length allows for maximum grip and adjustability across the entire fastener.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety, environmental responsibility, and interoperability.
• Right-hand thread direction and standard rounded head profile for compatibility with common tools and assembly processes.

Professional Applications & Engineering Value

This 3/8"-16 UNC fully threaded rounded head screw is engineered to address critical industrial fastening challenges where vibration resistance, corrosion prevention, and high tensile strength are paramount. The 18-8 stainless steel material, enhanced by a passivated finish, provides excellent durability against moisture, chemicals, and oxidation, making it ideal for outdoor equipment, marine hardware, and food processing machinery. The hex drive and button head style ensure a secure, flush fit that minimizes protrusion and allows for high-torque applications without stripping. With a Class 3A thread fit and coarse thread spacing, these screws offer superior holding power in metals, plastics, and composite materials, reducing installation time and improving assembly line efficiency in automotive, aerospace, and construction sectors.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse threading (3/8"-16) per ASME specifications. It is manufactured in compliance with ASME B18.3 for consistent quality and performance. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety regulations for hazardous substances.