S-92186A321 1/4"-28 x 1 3/4" ASME B18.2.1 Super-Corrosion-Resistant 316 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under high stress
• Precise and secure fastening ensured by the Class 2A thread fit and UNF fine thread profile, minimizing the risk of loosening
• Easy installation and removal with a standard external hex drive and 7/16" head width, compatible with common tools
• Optimized for specific applications with a partially threaded design and 1 3/4" length, providing strong clamping where needed
• Compliance with major standards including ASME B18.2.1, ensuring dimensional accuracy and interchangeability
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting strict regulatory requirements

Professional Applications & Engineering Value

This 1/4"-28 UNF hex head screw is engineered to address critical challenges in demanding industrial settings. The 316 stainless steel material provides outstanding resistance to corrosion, pitting, and chemical degradation, making it an ideal choice for marine, chemical processing, and outdoor applications. The UNF fine thread and Class 2A thread fit deliver superior vibration resistance and precise engagement, reducing the likelihood of fastener failure in dynamic environments. With its external hex drive and partially threaded shank, it offers efficient installation and optimal grip length for assemblies requiring high clamp force. This screw is a reliable solution for machinery, structural frameworks, and equipment where corrosion resistance and long-term durability are non-negotiable.

Specification Summary & Compliance

This screw adheres to precise dimensional standards with a Class 2A thread fit and UNF (Unified National Fine) thread specification. It is manufactured in compliance with ASME B18.2.1 for dimensional consistency and interchangeability. The product is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets current environmental and safety regulations for hazardous substances.