S-90079A630 3/8"-16 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced grip and torque application with a fully knurled head texture, reducing slippage during manual tightening and adjustments.
• Superior corrosion resistance and durability thanks to the black-oxide steel finish, extending the screw's service life in various industrial environments.
• High mechanical strength and reliability with a Rockwell B84 hardness and 70,000 psi tensile strength, ensuring the fastener withstands significant loads without failure.
• Easy alignment and engagement provided by the extended tip and coarse UNC thread, enabling quick and secure fastening in a wide range of materials.
• Space-saving low-profile round head design that fits into tight assemblies while maintaining a substantial head diameter for comfortable hand operation.
• Consistent and precise fit ensured by the Class 2A thread fit, promoting reliable performance and interchangeability in manufactured products.
• Safe for regulated industries as it is compliant with RoHS 3 and REACH environmental standards, meeting global material restriction requirements.

Professional Applications & Engineering Value

This 3/8"-16 thumb screw is engineered to solve common industrial fastening challenges where tool-less operation, high strength, and operator comfort are paramount. The black-oxide steel construction provides a robust barrier against rust and wear, making it ideal for machinery, electronic enclosures, and assembly jigs that require frequent adjustments. The coarse UNC thread and partially threaded design allow for rapid installation and reduced cross-threading risks, while the knurled head offers a non-slip surface for maximum manual torque application, even with gloved hands. Its low-profile round head and extended tip facilitate easy alignment in blind holes and confined spaces, streamlining maintenance and reducing assembly time in demanding industrial applications.

Specification Summary & Compliance

This thumb screw features a 3/8"-16 UNC coarse thread with a Class 2A fit for standard tolerance and reliable engagement. The thread length is 15/16" on a total length of 1 1/2", with a partially threaded shank. It is manufactured from steel with a black-oxide surface treatment and meets key regulatory standards, including RoHS 3 (2015/863/EU) compliance (with exemption 6(a)-I for lead) and REACH (EC 1907/2006) compliance, ensuring adherence to environmental and safety protocols for industrial components.