S-91375A643 3/8"-16 x 5" 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 strength with Class 3A thread fit for secure, vibration-resistant fastening in demanding applications.
- Superior corrosion resistance provided by the black-oxide finish on alloy steel, extending service life in harsh industrial environments.
- High durability and wear resistance from Rockwell C45 hardness, ensuring the screw maintains its integrity under heavy loads.
- Easy installation and removal with the hex drive design, allowing for high torque application without slipping.
- Reliable positioning and minimal surface damage due to the cup tip, which concentrates force for a firm grip on shafts and collars.
- Broad compatibility with UNC coarse threads, facilitating quick assembly and disassembly in various machinery and equipment.
- Confident regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address critical challenges in industrial settings, such as component slippage and corrosion-induced failure. Its UNC coarse threading and Class 3A thread fit deliver precise, tight fastening that resists loosening under vibration, making it ideal for securing pulleys, gears, and other rotating parts in heavy machinery. The hex drive enables efficient installation in confined spaces, while the cup tip ensures minimal marring on shafts, preserving equipment integrity. Built for high-strength applications, this screw supports reliable performance in automotive, manufacturing, and construction industries, reducing maintenance downtime and enhancing operational safety.
Specification Summary & Compliance
This set screw adheres to Class 3A thread tolerance for high precision and consistent fit. It conforms to UNC thread standards with a 3/8"-16 coarse thread and is manufactured in compliance with ASME B18.3 specifications. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and safe for industrial use worldwide.
