S-91375A138 3-56 x 3/32" 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
- Superior corrosion resistance with Black-Oxide finish, extending service life in demanding industrial environments.
- Exceptional thread precision from Class 3A fit, ensuring reliable, vibration-resistant fastening in critical assemblies.
- High-strength performance backed by Rockwell C45 hardness, providing excellent resistance to wear and deformation.
- Secure, flush mounting with a headless design and cup tip, ideal for applications where a protruding head is not permissible.
- Easy installation and removal using a standard 0.050" hex key, streamlining maintenance and assembly processes.
- Optimized for fine-thread applications with UNF 3-56 threading, offering superior holding power in thinner materials.
- Guaranteed compliance and reliability meeting ASME B18.3 standards, ensuring consistent quality and interchangeability.
Professional Applications & Engineering Value
This 3-56 UNF set screw is engineered to address common challenges in precision machinery and equipment assembly. The Black-Oxide Alloy Steel construction provides a durable barrier against rust and corrosion, essential for maintaining integrity in humid or chemically aggressive settings. Its Class 3A thread fit and fine thread spacing deliver superior clamping force and resistance to loosening under vibration, making it ideal for securing collars, gears, and pulleys on shafts. The headless design and cup tip allow for a flush finish, preventing interference in compact spaces. Commonly used in aerospace, automotive, and electronic enclosures, this screw ensures long-term reliability and precise component alignment, reducing maintenance needs and downtime.
Specification Summary & Compliance
This set screw features a 3-56 UNF thread with a Class 3A thread fit for high precision, a length of 3/32", and a 0.050" hex drive. It is manufactured from Alloy Steel with a Black-Oxide surface treatment and a hardness of Rockwell C45. The product conforms to ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.
