S-94355A135 4-40 x 3/16" 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 18-8 stainless steel construction, ideal for harsh environments and extended service life
- Exceptional thread engagement due to Class 3A thread fit, ensuring reliable, vibration-resistant fastening in precision assemblies
- High-strength performance backed by Rockwell B80 hardness, providing excellent durability and resistance to wear
- Secure, flush installation with a flat tip and headless design, preventing protrusion and maintaining a clean finish
- Easy installation and removal using a standard 0.050" hex drive, reducing assembly time and tooling requirements
- Wide industrial compatibility with UNC coarse threads and right-hand direction, suitable for common machinery and equipment
- Compliance with major standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance
Professional Applications & Engineering Value
This 4-40 UNC set screw is engineered to address critical fastening challenges in industrial settings. The 18-8 stainless steel material offers outstanding corrosion resistance, making it suitable for applications exposed to moisture, chemicals, or outdoor elements. Its hex headless and flat tip design allows for secure, flush mounting in pulleys, gears, and collars, minimizing obstruction and reducing the risk of loosening under vibration. The Class 3A thread fit and coarse thread spacing ensure quick assembly and robust holding power, which is essential for machinery, automotive, and electronics where precision and reliability are paramount. By meeting ASME B18.3 specifications, this screw delivers consistent performance, helping engineers and maintenance teams achieve long-term operational efficiency.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit tolerances for precise engagement, with UNC coarse threads (4-40 size) and a right-hand direction. It is manufactured in compliance with ASME B18.3 standards and is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets environmental and safety regulations for industrial use.
