S-91185A841 5/16"-18 x 7/8" Thumb Screws

Key Features & Benefits at a Glance

• Effortless manual operation with multi-lobe acetal plastic head providing superior grip without tools
• Corrosion-resistant performance through 18-8 stainless steel construction for long service life
• Precise thread engagement with Class 3A thread fit ensuring reliable fastening in industrial applications
• Durable plastic head made from acetal material maintaining integrity across 32° to 180° F temperature range
• Quick installation enabled by UNC coarse threading and fully threaded design
• Enhanced visibility and aesthetics with black head color for professional appearance
• Regulatory compliance meeting RoHS 3 and REACH standards for safe usage

Professional Applications & Engineering Value

These 5/16"-18 thumb screws combine the corrosion resistance of 18-8 stainless steel with the ergonomic advantages of black acetal plastic multi-lobe heads, creating an optimal solution for frequent adjustment applications. The Class 3A thread fit with UNC coarse spacing ensures secure fastening in machinery, electronic enclosures, and industrial equipment where repeated access is required. The fully threaded design provides consistent engagement depth, while the 1 1/2" head diameter offers substantial torque surface for hand-tightening operations. This combination addresses common industrial challenges of tool-free maintenance, corrosion prevention, and reliable fastening performance in environments requiring regular component access or adjustment.

Specification Summary & Compliance

Manufactured to precise UNC thread standards with Class 3A thread fit for superior dimensional accuracy. The screws feature right-hand thread direction with coarse thread spacing (18 TPI) and are fully threaded along the 7/8" length. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and restricted substance adherence for industrial applications.