S-91725A110 1/4"-20 Thumb Nuts

Key Features & Benefits at a Glance

• Effortless hand-tightening with a knurled round head for superior grip in tight spaces or when tools are unavailable
• Exceptional corrosion resistance provided by 18-8 Stainless Steel, ensuring long-term reliability in harsh environments
• Space-saving low-profile design (1/4" height) ideal for applications with limited clearance
• Robust and reliable coarse threading with UNC 1/4"-20 and Class 2B fit for quick assembly and vibration resistance
• Enhanced fastening security with four 3/32" holes, allowing for optional safety wiring or locking mechanisms
• Broad industrial compatibility with a standard 7/8" head diameter and right-hand thread for common applications
• Safe for regulated industries with full compliance to REACH and RoHS 3 environmental standards

Professional Applications & Engineering Value

This low-profile thumb nut is engineered to solve critical assembly challenges in maintenance-heavy and space-constrained environments. The 18-8 Stainless Steel construction provides excellent resistance to rust and corrosion, making it a durable choice for outdoor equipment, marine applications, and food processing machinery where frequent washdowns occur. The knurled round head offers a secure, non-slip surface for hand tightening, reducing the need for tools and speeding up field service or adjustments. Its UNC coarse thread ensures rapid installation and is less prone to cross-threading compared to fine threads, while the Class 2B thread fit guarantees consistent performance and interchangeability. The inclusion of four holes allows for positive locking, preventing accidental loosening from vibrations in automotive, aerospace, or industrial machinery assemblies, thereby enhancing operational safety and reducing downtime.

Specification Summary & Compliance

This thumb nut adheres to Class 2B thread fit tolerances for unified coarse (UNC) 1/4"-20 right-hand threads, ensuring precision and compatibility with standard mating components. Manufacturing conforms to industry standards for dimensional accuracy, including a head diameter of 7/8" and a low profile height of 1/4". The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) directives, confirming it is free from hazardous substances and suitable for use in environmentally conscious and regulated markets.