S-91375A180 4-48 x 3/8" 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 coating, extending service life in harsh industrial environments.
- Exceptional thread precision from Class 3A fit ensures reliable, vibration-resistant fastening in critical assemblies.
- High-strength durability with Rockwell C45 hardness alloy steel, resisting deformation under heavy loads.
- Secure, flush installation thanks to the headless design and 0.050" hex drive, ideal for confined spaces.
- Enhanced grip and positioning with the cup tip, preventing slippage on shaft components.
- Fine thread spacing provides improved adjustment accuracy and holding power in precision applications.
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental standards are met.
Professional Applications & Engineering Value
This 4-48 UNF set screw is engineered to address common industrial challenges like component misalignment, vibration loosening, and environmental degradation. The black-oxide alloy steel construction offers excellent resistance to rust and wear, making it suitable for automotive, aerospace, and machinery applications where exposure to moisture or chemicals is a concern. The Class 3A thread fit and fine thread spacing deliver precise clamping force and minimal backlash, crucial for maintaining alignment in precision instruments and rotating assemblies. Its headless design with hex drive allows for easy installation in tight spaces, while the cup tip ensures firm contact on shafts or collars, preventing rotational slip. Ideal for securing gears, pulleys, and other components, this screw provides long-term reliability in high-stress environments.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit tolerances per UNF standards, ensuring high precision and interchangeability. It meets ASME B18.3 specifications for dimensional consistency and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for industrial use globally.
