S-91745A581 5/16"-18 x 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual operation efficiency with a wide 7/8" spade head design for superior grip and quick hand-tightening without tools.
• Excellent corrosion resistance provided by 18-8 stainless steel material, ideal for humid or demanding industrial environments.
• Reliable coarse threading with UNC 5/16"-18 threads ensures faster installation and reduced cross-threading risks in assembly applications.
• Precise thread fit with Class 2A tolerance guarantees consistent engagement and secure fastening in repetitive use.
• Full threading along the 3/4" length allows for maximum adjustability and holding power in various material thicknesses.
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in regulated industries.
• Right-hand thread direction offers intuitive, standard installation for straightforward operational workflows.

Professional Applications & Engineering Value

This 5/16"-18 UNC thumb screw is engineered to address common challenges in industrial assembly, such as the need for rapid, tool-free adjustments and corrosion durability. The 18-8 stainless steel construction provides inherent resistance to rust and oxidation, making it suitable for applications in electronics, machinery panels, and outdoor equipment where exposure to moisture is a concern. The spade head design offers an ergonomic advantage, reducing hand fatigue during frequent adjustments, while the coarse UNC threads facilitate quick engagement in softer materials or pre-tapped holes, minimizing installation time. Fully threaded and built with a Class 2A thread fit, this screw ensures reliable performance in vibration-prone settings, enhancing overall assembly integrity and reducing maintenance needs in B2B environments like manufacturing and maintenance operations.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with a size of 5/16"-18 and a Class 2A thread fit for precise dimensional accuracy. It is fully threaded with a right-hand direction and coarse spacing, measuring 3/4" in length. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety requirements for industrial use.