S-93886A101 4-40 Thumb Nuts

Key Features & Benefits at a Glance

• Easy hand-tightening installation with knurled head texture for superior grip without tools
• Excellent chemical and moisture resistance from durable Acetal Plastic construction
• Reliable performance across temperature variations with stable operation from 32° to 180°F
• Secure fastening in coarse thread applications with fully threaded 4-40 UNC Class 2B design
• Quick visual identification and aesthetic appeal with distinctive black color and round head profile
• Wide industrial compatibility through right-hand threading and standard inch measurements
• Environmental regulation compliance meeting both REACH and RoHS 3 standards

Professional Applications & Engineering Value

This Acetal Plastic thumb nut delivers exceptional value in applications requiring frequent adjustments or tool-free maintenance. The knurled round head provides positive grip even with gloved hands, while the 4-40 UNC coarse threading ensures rapid installation and removal in plastic components, electronic enclosures, and light assembly fixtures. The black Acetal material offers low friction and excellent dimensional stability, resisting deformation under load while maintaining Class 2B thread fit precision. Ideal for industrial equipment, consumer products, and electrical assemblies where corrosion resistance, electrical insulation, and regulatory compliance are essential.

Specification Summary & Compliance

This thumb nut features 4-40 UNC coarse threads with Class 2B fit for consistent engagement, manufactured to standard inch dimensions including 5/16" head diameter and 3/16" height. The product fully complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations, ensuring safe use in various industrial applications while maintaining dimensional accuracy across the specified temperature range.