S-91746A541 8-32 x 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced Grip & Easy Manual Operation: Knurled round head design ensures secure handling without tools, speeding up assembly in tight spaces.
• Superior Corrosion Resistance: Made from 18-8 stainless steel, offering excellent durability in humid or corrosive industrial environments.
• High Tensile Strength for Demanding Applications: Withstands up to 80,000 psi tensile strength and Rockwell B85 hardness, ensuring reliable performance under stress.
• Precision Thread Fit for Secure Fastening: Class 2A thread fit with UNC coarse threads provides consistent engagement and vibration resistance.
• Partial Threading for Versatile Use: Allows for adjustable clamping force, ideal for panels, enclosures, and machinery requiring frequent access.
• Compliance with Environmental Standards: Meets RoHS 3 and REACH regulations, ensuring safe use in regulated industries.
• Right-Hand Thread for Standard Assembly: Compatible with common 8-32 UNC threaded components, simplifying inventory and installation.

Professional Applications & Engineering Value

This 8-32 UNC thumb screw is engineered to address common industrial challenges, such as frequent disassembly and exposure to harsh conditions. The 18-8 stainless steel construction provides inherent corrosion resistance, reducing maintenance costs in applications like electrical enclosures, machinery guards, and instrumentation panels. The knurled head offers a non-slip surface, enabling quick manual adjustments without specialized tools, which is critical in maintenance-heavy environments. With a coarse thread and Class 2A fit, it ensures reliable fastening in partially threaded setups, minimizing loosening from vibrations. Ideal for OEM and MRO uses, this screw enhances efficiency in assembly lines and equipment where durability and compliance are paramount.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with an 8-32 thread size and Class 2A thread fit for precise dimensional accuracy. It features a 0.164" thread diameter, 7/16" thread length, and 1/2" overall length with partial threading. Manufactured from 18-8 stainless steel, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and suitability for global industrial markets.