S-97763A346 1/4"-20 x 7/8" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from Black-Oxide 18-8 Stainless Steel, ideal for harsh environments and reducing replacement costs
• High tensile strength of 70,000 psi ensures reliable, long-lasting fastening under demanding loads
• Class 3A thread fit provides precise, tight tolerances for secure assemblies with minimal backlash
• Fully threaded UNC coarse spacing delivers faster installation and enhanced holding power in various materials
• Rockwell B55 hardness offers excellent durability and resistance to wear during repeated use
• 5/32" hex drive allows for easy, high-torque installation with standard tools, reducing assembly time
• Rounded button head design combines a low-profile, finished appearance with reduced risk of snagging

Professional Applications & Engineering Value

Engineered for industrial and mechanical assemblies, these Black-Oxide 18-8 Stainless Steel rounded head screws address common challenges like corrosion, vibration loosening, and high-stress fatigue. The UNC coarse thread and Class 3A fit ensure rapid, secure fastening in metals and plastics, minimizing the risk of cross-threading. With a hex drive for efficient installation and fully threaded design for consistent grip, they are ideal for machinery, enclosures, and structural applications where reliability and compliance with ASME B18.3 are critical. The black-oxide finish not only enhances corrosion resistance but also provides a professional, non-reflective surface suitable for OEM and MRO uses.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with Class 3A precision tolerances for accurate fit. Manufactured to meet ASME B18.3 specifications, it ensures dimensional consistency and performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for industrial use.