S-91301A005 4-40 x 5/64" 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 and durability thanks to the black-oxide finish on alloy steel, extending service life.
- High strength and wear resistance from Rockwell C45 hardness, ensuring reliable performance under load.
- Easy installation and removal with the 0.050" hex drive, allowing for efficient assembly in tight spaces.
- Wide compatibility due to UNC coarse thread spacing, facilitating quick engagement with standard components.
- Space-saving headless design ideal for applications where a flush or low-profile finish is required.
- Compliance with environmental and safety standards including RoHS 3 and REACH, ensuring safe use in various industries.
Professional Applications & Engineering Value
This 4-40 UNC set screw is engineered to address common industrial challenges such as component slippage and corrosion in precision assemblies. Crafted from black-oxide alloy steel, it offers enhanced protection against rust and wear, making it suitable for machinery, electronics, and automotive systems where reliability is critical. The hex drive design ensures straightforward torque application, even in confined areas, while the Class 3A thread fit provides tight tolerances to prevent loosening under vibration. Its headless and right-hand thread configuration allows for seamless integration in adjustable mechanisms, delivering consistent fastening solutions that reduce maintenance needs and downtime.
Specification Summary & Compliance
This set screw adheres to UNC thread standards with a Class 3A thread fit for precise dimensional accuracy and coarse thread spacing. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. Manufactured to high-quality specifications, including a Rockwell C45 hardness, it guarantees consistent performance in industrial fastener applications.
