S-91882A458 3/8"-16 x 1 1/4" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced hand-tightening grip with knurled texture on the 1 3/8" diameter head for secure, tool-free operation in tight spaces.
• Superior corrosion resistance and durability from the black-oxide steel finish, extending service life in demanding industrial environments.
• High load-bearing capability with 70000 psi tensile strength and Rockwell B84 hardness, ensuring reliable performance under stress.
• Quick and easy installation thanks to the coarse UNC 3/8"-16 thread and Class 2A fit, reducing assembly time and effort.
• Full-thread engagement along the 1 1/4" length for maximum holding power and stability in various materials.
• Compliance with global regulations including RoHS 3 and REACH, making it suitable for international supply chains and sensitive applications.
• Right-hand thread design for intuitive, standard tightening direction, minimizing user error in fast-paced settings.

Professional Applications & Engineering Value

This black-oxide steel thumb screw is engineered to address common challenges in industrial assembly, such as the need for rapid, tool-free adjustments without compromising strength. The knurled head provides a non-slip surface, ideal for applications where gloves are worn or space is limited, such as in machinery access panels, electronic enclosures, and automotive components. Its UNC coarse thread and Class 2A fit ensure quick engagement and reliable fastening in metals or plastics, reducing the risk of cross-threading. With a 70000 psi tensile strength and corrosion-resistant finish, it withstands vibration and harsh conditions, making it a cost-effective solution for maintenance-heavy environments. This screw is widely used in industrial equipment, prototyping, and OEM assemblies where durability and ease of use are critical.

Specification Summary & Compliance

The screw adheres to UNC 3/8"-16 thread standards with a Class 2A thread fit for precise dimensional accuracy and ease of assembly. It is fully threaded with a right-hand direction and coarse spacing, manufactured from steel with a black-oxide finish. Compliance includes RoHS 3 (2015/863/EU) with exemption 6(a)-I for lead as an alloying element in steel, and REACH (EC 1907/2006) adherence, ensuring environmental and safety standards are met for industrial use.