S-91185A955 5/16"-18 x 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Effortless manual operation with ergonomic two-arm acetal plastic head requiring no tools
• Superior corrosion resistance through 18-8 stainless steel construction for long service life
• Precise thread engagement with Class 3A UNC coarse threads ensuring reliable fastening
• Maximum holding power via fully threaded design distributing load across entire length
• Chemical-resistant black acetal head maintaining appearance in harsh environments (32°-180°F)
• Quick installation with right-hand threading following industry-standard direction
• Regulatory compliance meeting RoHS 3 and REACH standards for safe industrial use

Professional Applications & Engineering Value

This 5/16"-18 thumb screw combines the corrosion resistance of 18-8 stainless steel with the ergonomic advantages of a black acetal plastic head to solve critical industrial fastening challenges. The Class 3A thread fit with UNC coarse threading provides exceptional grip in applications requiring frequent adjustments, while the fully threaded design ensures maximum engagement depth for vibration resistance. Ideal for access panels, machinery guards, and electronic enclosures where tool-less operation and chemical resistance are paramount. The two-arm head configuration delivers superior torque application without specialized tools, reducing maintenance time in manufacturing, automotive, and electronic assembly environments.

Specification Summary & Compliance

Manufactured to precise inch system measurements with 5/16"-18 UNC coarse threads meeting Class 3A thread fit standards for superior dimensional accuracy. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material transparency. Features fully threaded right-hand direction threading with 1/2" length and 1 1/2" head width for consistent performance across industrial applications.