S-97042A188 1/4"-28 x 5 1/2" Partially Threaded Studs

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and outdoor applications.
• Precision thread engagement with Class 2A fit ensures reliable, secure connections and reduces the risk of cross-threading during assembly.
• High tensile strength of 70,000 psi provides exceptional load-bearing capacity and structural integrity for demanding mechanical applications.
• Optimized partial threading design with a 3/4" threaded length and 4 3/4" smooth shank allows for versatile clamping and precise component positioning.
• Fine UNF threading (1/4"-28) offers a tighter, more vibration-resistant fit compared to coarse threads, enhancing joint stability.
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring safety and environmental responsibility in global supply chains.
• Right-hand thread direction facilitates standard, intuitive installation and removal with common tools, speeding up assembly processes.

Professional Applications & Engineering Value

This 18-8 Stainless Steel Partially Threaded Stud is engineered to address critical challenges in precision assembly and machinery. The corrosion-resistant material prevents degradation in humid or chemically aggressive settings, extending service life in industrial equipment, automotive subsystems, and marine hardware. Its 1/4"-28 UNF fine thread and Class 2A fit provide excellent resistance to loosening under vibration, a common failure point in dynamic applications. The partially threaded design allows the smooth shank to act as a precision guide or pivot, while the threaded end secures components without compromising alignment. This combination of high tensile strength (70,000 psi) and dimensional accuracy makes it a reliable choice for OEMs and maintenance teams seeking durable, repeatable fastening solutions.

Specification Summary & Compliance

This stud adheres to UNF (Unified National Fine) thread standards with a Class 2A external thread fit, ensuring consistent interchangeability and ease of assembly. Key dimensional tolerances include a shaft diameter of 1/4" with a tolerance of -0.005" to 0.005", and overall length of 5 1/2". The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances and supporting sustainable procurement practices.