S-92991A147 1/2"-13 x 1 1/4" ASME B18.3 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
- Superior corrosion resistance from high-quality brass construction, ideal for harsh environments and extended service life.
- Exceptional holding power and vibration resistance due to the cup tip design that bites securely into shafts and components.
- Precise and reliable fit with Class 3A thread tolerance, ensuring consistent performance and reducing the risk of assembly issues.
- High torque application capability enabled by the 1/4" hex drive and Rockwell B55 hardness, preventing stripping and deformation.
- Quick and easy installation with coarse UNC threads, speeding up assembly processes in time-sensitive operations.
- Flush, headless design for a clean finish and use in confined spaces where protruding fasteners are not feasible.
- Guaranteed industrial compliance meeting ASME B18.3 standards, ensuring interchangeability and reliability in demanding applications.
Professional Applications & Engineering Value
This brass set screw is engineered to solve critical challenges in industrial assembly, such as component slippage and corrosion-induced failure. The 1/2"-13 UNC coarse thread and Class 3A fit provide a secure, tight hold on pulleys, gears, and collars, resisting loosening under high vibration. The cup tip concentrates pressure for maximum grip without damaging shafts, while the headless, hex drive design allows for installation in recessed or tight spaces. Made from durable brass with Rockwell B55 hardness, it offers excellent mechanical strength and is naturally resistant to rust and galvanic corrosion, making it a reliable choice for machinery, marine equipment, and electrical enclosures where long-term, maintenance-free performance is essential.
Specification Summary & Compliance
This set screw features a 1/2"-13 UNC coarse thread with a Class 3A precision fit for high-accuracy assemblies. It is manufactured in compliance with ASME B18.3 specifications and adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial use.
