S-98704A105 4-40 x 9/32" Thumb Screws
Thumb 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
- Enhanced manual grip and torque application with a knurled acetal plastic head for secure handling in various conditions.
- Superior corrosion resistance and durability thanks to 18-8 stainless steel construction, ideal for demanding environments.
- Precise and reliable fastening with Class 3A thread fit, ensuring tight tolerances and reduced risk of loosening.
- Easy installation and removal using a standard 3/32" hex drive, compatible with common tools for efficient assembly.
- Low-profile round head design minimizes protrusion, making it suitable for space-constrained applications.
- Compliance with environmental regulations including RoHS 3 and REACH, supporting sustainable and safe manufacturing practices.
- Versatile temperature performance with a head temperature range of 32° to 180° F, suitable for various industrial settings.
Professional Applications & Engineering Value
This 4-40 UNC thumb screw is engineered to address common challenges in industrial assembly, such as the need for quick, tool-free adjustments and reliable fastening under vibration. The 18-8 stainless steel material provides excellent strength and corrosion resistance, reducing maintenance in harsh environments. Paired with a black finish and knurled acetal plastic head, it offers a non-slip grip that enhances operator efficiency in electronics, machinery, and automotive applications. The coarse thread and fully threaded design ensure rapid installation and secure holding power, while the low-profile round head prevents interference in compact designs. Ideal for B2B procurement, this fastener streamlines production lines and supports long-term reliability.
Specification Summary & Compliance
This thumb screw features a 4-40 UNC thread with Class 3A fit for high precision and coarse spacing, measuring 9/32" in length. It adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety. The manufacturing standards include a right-hand thread direction and fully threaded design for consistent performance.
