S-95150A144 1/4"-20 Thumb Nuts

Key Features & Benefits at a Glance

• Effortless hand-tightening with a knurled round head for superior grip, even with gloves or oily hands.
• Enhanced load distribution and vibration resistance thanks to the integrated flange, eliminating the need for a separate washer.
• Superior corrosion resistance from passivated 18-8 stainless steel, ensuring long-term reliability in harsh environments.
• Quick and easy installation with a fully threaded, coarse UNC design for rapid assembly and disassembly.
• Reliable and consistent thread engagement with a Class 2B fit, preventing cross-threading and ensuring a secure fastening.
• Durable and robust construction with precise dimensions (e.g., 9/16" head diameter) for repeated use in demanding applications.
• Safe for regulated industries with full compliance to RoHS 3 and REACH environmental standards.

Professional Applications & Engineering Value

This flanged thumb nut is engineered to solve common assembly challenges in maintenance, machinery, and equipment. The knurled head provides a non-slip surface, enabling quick manual adjustments without tools, which is critical for panels, access covers, or components requiring frequent service. Made from passivated 18-8 stainless steel, it offers excellent resistance to rust and corrosion, making it ideal for outdoor, marine, or chemical-exposed settings. The UNC coarse thread and Class 2B fit ensure fast, reliable threading onto 1/4"-20 bolts, reducing installation time and preventing stripping. Its flanged design increases the bearing surface, distributing clamp load effectively to protect sensitive materials from damage and resist loosening under vibration, providing a dependable, reusable fastening solution for industrial assembly lines, electrical enclosures, and automotive fixtures.

Specification Summary & Compliance

This thumb nut features a 1/4"-20 UNC coarse thread with a Class 2B thread fit for standard tolerance and easy assembly. Key dimensions include a collar diameter of 15/32", collar height of 7/32", head diameter of 9/16", and overall height of 3/8". It is manufactured from 18-8 stainless steel with a passivated surface finish and 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 use.