S-97042A185 1/4"-28 x 4" Partially Threaded Studs

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and reducing long-term maintenance costs.
• High-strength performance offering 70,000 psi tensile strength for reliable load-bearing in demanding mechanical assemblies.
• Precision thread fit with Class 2A tolerance ensuring smooth assembly, reduced galling, and consistent mating with internal threads.
• Optimized partial threading with 3/4" thread length on one end, providing secure fastening while leaving a smooth shank for alignment or clearance.
• Fine UNF thread spacing delivers superior vibration resistance and improved sealing capabilities compared to coarse threads.
• Right-hand thread direction for standard, intuitive installation and compatibility with common industrial components.
• Environmental compliance meeting RoHS 3 and REACH standards, ensuring safety and suitability for regulated global markets.

Professional Applications & Engineering Value

This 1/4"-28 UNF partially threaded stud is engineered to address critical challenges in precision assembly and machinery. The 18-8 Stainless Steel material provides excellent resistance to oxidation and chemical exposure, making it suitable for applications in automotive, aerospace, and food processing equipment where durability is paramount. The Class 2A thread fit and fine UNF threading ensure minimal play and enhanced fatigue resistance under dynamic loads, reducing the risk of loosening in high-vibration environments. With a 70,000 psi tensile strength, it reliably secures components in structural frameworks, pump systems, and motor mounts, offering a robust industrial stud solution that balances strength with precise dimensional control for streamlined production and maintenance workflows.

Specification Summary & Compliance

This stud adheres to UNF (Unified National Fine) thread standards with a Class 2A external thread fit for consistent interchangeability. The shaft diameter is 1/4" with a tolerance of -0.005" to 0.005", ensuring precise alignment. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for environmentally conscious industrial applications without hazardous substances.