S-91375A161 6-40 x 3/16" ASME B18.3, ASTM F912 Set Screws
Set Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional holding power with Class 3A thread fit for secure, vibration-resistant fastening in demanding applications.
- Superior corrosion resistance from the Black-Oxide finish on Alloy Steel, extending service life in various industrial environments.
- High-strength durability with a Rockwell C45 hardness, ensuring the screw withstands high stress without stripping or deforming.
- Secure, flush mounting enabled by the headless design and cup tip, which bites into surfaces to prevent component slippage.
- Precise installation and removal using the 1/16" Hex Drive, providing a reliable grip for torque control in confined spaces.
- Optimized for fine-thread applications with 6-40 UNF right-hand threads, offering excellent engagement in thin materials.
- Broad regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe, global use in regulated industries.
Professional Applications & Engineering Value
This 6-40 UNF set screw is engineered to address critical challenges in precision assemblies, such as securing collars, gears, and pulleys on shafts. The Black-Oxide Alloy Steel construction provides a robust barrier against rust and wear, essential for machinery operating in humid or corrosive conditions. Its headless design and cup tip ensure a flush fit and positive locking, minimizing protrusions and resisting loosening under vibration—common in automotive, aerospace, and manufacturing equipment. The fine thread spacing and Class 3A fit deliver tight tolerances for reliable performance in high-precision components, reducing maintenance needs and enhancing operational safety.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit per UNF standards, ensuring precise dimensional accuracy and interchangeability. It conforms to ASME B18.3 specifications for dimensional integrity and is manufactured from Alloy Steel with a Rockwell C45 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming it is free of hazardous substances and suitable for environmentally regulated applications.
