S-98704A815 5/16"-18 x 7/8" Thumb Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for humid or chemically exposed environments
• Excellent grip and torque application thanks to the knurled black acetal plastic head that won't slip during hand-tightening
• Precise, reliable fastening ensured by Class 3A thread fit for tight tolerances and reduced risk of cross-threading
• Quick installation and removal with the low-profile round head design, providing easy access in confined spaces
• Durable performance in moderate temperatures with a head temperature range of 32° to 180° F
• Versatile coarse UNC threading for faster driving and secure holding in a variety of materials
• Full-length threading for maximum adjustability and holding power along the entire 7/8" length

Professional Applications & Engineering Value

This 5/16"-18 UNC thumb screw delivers exceptional value in industrial and electronic assembly where frequent adjustments are needed. The 18-8 stainless steel body resists rust and corrosion, extending service life in demanding conditions, while the black acetal plastic knurled head offers a non-marring, insulated grip that enhances operator safety and comfort. Its low-profile round head and coarse thread design allow for rapid installation without tools, reducing assembly time in production lines, panel fastening, and machinery covers. The fully threaded shank ensures consistent clamping force, making it a reliable choice for vibration-prone applications.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with a Class 3A thread fit for high precision. It features a 5/16"-18 thread size, 7/8" length, and right-hand thread direction. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety standards for industrial components.