S-91185A853 5/16"-24 x 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced Grip & Comfort: Multi-lobe black acetal plastic head design ensures secure, comfortable hand-tightening without tools, reducing operator fatigue.
• Superior Thread Precision: Class 3A fine UNF threads provide excellent engagement and vibration resistance in demanding applications.
• Exceptional Corrosion Resistance: 18-8 stainless steel construction offers reliable performance in various environments, minimizing rust and maintenance.
• Wide Thermal Suitability: Acetal plastic head operates effectively in temperatures from 32° to 180°F, ensuring stability across many industrial settings.
• Optimized for Quick Adjustments: Large 1 1/2" head diameter and right-hand threading enable fast, easy installation and removal for frequent access panels.
• Full Regulatory Compliance: Meets RoHS 3 and REACH standards, making it safe for use in regulated industries and global markets.
• Durable & Lightweight Design: Combines the strength of stainless steel with the lightweight, non-marring properties of acetal plastic for versatile use.

Professional Applications & Engineering Value

This 5/16"-24 UNF thumb screw is engineered to address common industrial challenges, such as the need for rapid, tool-free fastening in equipment maintenance and electronic enclosures. The 18-8 stainless steel body ensures long-term corrosion resistance, while the multi-lobe black acetal plastic head offers a secure grip that withstands repeated use without slipping. Its Class 3A fine threading delivers precise fit and vibration resistance, critical in machinery and assembly lines where loosening can cause downtime. Ideal for applications requiring frequent adjustments, such as access panels, calibration devices, and prototyping fixtures, this screw combines durability with user convenience, supporting efficient operations in manufacturing, aerospace, and electronics sectors.

Specification Summary & Compliance

This thumb screw features a 5/16"-24 UNF thread with Class 3A fit for high precision and fine thread spacing. It is fully threaded and right-hand direction, with dimensions including a 3/4" length and 1 1/2" head diameter. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for industrial use.