S-90289A626 3/8"-16 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 with black-oxide coating, extending service life in harsh industrial environments.
- Exceptional holding power provided by the Class 3A thread fit, ensuring a secure, vibration-resistant connection.
- High-strength durability from Rockwell C45 hardened alloy steel, preventing stripping and deformation under heavy loads.
- Secure locking mechanism with serrations under the head, maintaining position without loosening.
- Easy installation and removal using the 3/16" hex drive, allowing for high-torque application in confined spaces.
- Effective component positioning with the cup tip design, concentrating force for a firm grip on shafts and collars.
- Reliable coarse threading (UNC) for faster assembly and reduced cross-threading risk in demanding applications.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address critical challenges in industrial assembly and heavy-duty machinery. Its headless design with hex drive allows for flush mounting in tight spaces, while the 3/8"-16 UNC coarse thread and Class 3A fit provide a precise, secure fit that resists vibration-induced loosening. The Rockwell C45 hardness ensures the fastener maintains its integrity under high stress, preventing failure in applications like securing gears, pulleys, and collars on rotating shafts. The black-oxide surface treatment offers a durable barrier against corrosion, making it ideal for use in environments exposed to moisture or chemicals, thereby reducing maintenance needs and extending equipment lifespan.
Specification Summary & Compliance
This set screw features a 3/8"-16 UNC coarse thread with a Class 3A thread fit for high precision and strength. It is manufactured in compliance with ASME B18.3 standards, ensuring consistent quality and dimensional accuracy. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for use in various industrial sectors.
