S-92845A745 1/4"-28 x 1 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit and fine thread spacing for maximum resistance to vibration and loosening in dynamic applications.
• Excellent corrosion resistance provided by 18-8 Stainless Steel material, ensuring long-term reliability in harsh or outdoor environments.
• Enhanced mechanical locking due to the extended tip design, which increases surface contact and grip for secure component positioning.
• High durability and strength with a Rockwell B80 hardness, offering reliable performance under heavy loads and repeated use.
• Precise and secure installation enabled by the 1/8" hex drive and headless design, allowing for flush mounting and easy access in confined spaces.
• Broad compliance and safety meeting ASME B18.3 specifications, RoHS 3, and REACH regulations for use in regulated and international markets.
• Optimized for right-hand thread applications ensuring compatibility with standard assembly tools and processes for efficient installation.

Professional Applications & Engineering Value

This 1/4"-28 UNF Class 3A set screw is engineered to address critical challenges in industrial assemblies where vibration resistance and secure mechanical locking are paramount. Made from 18-8 Stainless Steel, it provides excellent corrosion resistance, making it ideal for use in automotive, aerospace, and machinery sectors exposed to moisture or chemicals. The extended tip and fine thread spacing enhance grip on shafts and collars, preventing slippage and maintaining alignment in high-stress environments. Its headless design with a hex drive allows for compact installations and tool accessibility, reducing assembly time and improving overall system integrity. By combining precision thread standards with robust material properties, this screw delivers reliable performance in demanding applications, from precision instruments to heavy-duty equipment.

Specification Summary & Compliance

This set screw adheres to Class 3A thread fit for precise dimensional accuracy and UNF fine thread specifications, ensuring tight tolerances and reliable engagement. It complies with ASME B18.3 manufacturing standards, guaranteeing consistent quality and performance. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for hazardous substance restrictions. The extended tip features tight diameter and length tolerances (e.g., tip diameter: 0.156" with -0.007" to 0 tolerance), supporting high-precision applications in various industrial settings.