S-91746A919 4-40 x 3/8" 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
- Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
- Exceptional mechanical strength with 80,000 PSI tensile strength and Rockwell B83 hardness for reliable, long-term performance
- Enhanced user grip and tool-free operation thanks to the knurled round head and slotted drive combination
- Precise and secure fastening ensured by the Class 2A thread fit and fully threaded 4-40 UNC coarse spacing
- Quick installation and adjustment with right-hand thread direction and narrow profile for easy hand-tightening
- Compliance with strict environmental standards including RoHS 3 and REACH for safe, sustainable use
- Versatile compatibility with standard UNC threaded components, reducing assembly time and inventory complexity
Professional Applications & Engineering Value
This 18-8 stainless steel thumb screw is engineered to address common industrial challenges such as frequent adjustments, corrosion in moist or chemical environments, and the need for tool-less maintenance. The fully threaded 4-40 UNC design with coarse spacing provides rapid installation and high holding power, while the knurled round head offers a secure, non-slip grip even with gloves. Its narrow profile and right-hand thread make it ideal for electronics enclosures, machinery panels, and laboratory equipment where space is limited and corrosion resistance is critical. By combining durability with user-friendly operation, this thumb screw reduces downtime and maintenance costs in demanding industrial applications.
Specification Summary & Compliance
This thumb screw features a Class 2A thread fit per UNC standards, ensuring precise dimensional accuracy and reliable engagement. It is manufactured from 18-8 stainless steel with a tensile strength of 80,000 PSI and hardness of Rockwell B83. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.
