S-92239A390 1/4"-20 Thumb Nuts

Key Features & Benefits at a Glance

• Easy hand-tightening without tools thanks to the wing-style head design, ideal for quick adjustments and maintenance.
• Enhanced load distribution and vibration resistance from the 7/8" flat flange, reducing surface damage and loosening.
• Superior corrosion protection with the black zinc alloy finish, extending service life in harsh industrial environments.
• Reliable coarse thread engagement with 1/4"-20 UNC threads, ensuring fast assembly and reduced cross-threading risks.
• Consistent threading precision with Class 2B fit, providing smooth installation and secure fastening.
• Durable right-hand threading for standard applications, offering dependable performance in repetitive use.
• Robust construction from alloy material, supporting high-strength requirements in demanding setups.

Professional Applications & Engineering Value

This black zinc flanged thumb nut is engineered to address common industrial challenges such as time-consuming assembly and vibration-induced loosening. The wing nut profile allows for effortless manual tightening and removal, eliminating the need for tools in applications requiring frequent access, like machinery panels, electrical enclosures, and automotive components. The flat flange design increases the bearing surface, distributing clamp load evenly to prevent damage to soft materials and maintain joint integrity under dynamic loads. Made from a zinc alloy with a protective coating, it resists rust and wear in moist or abrasive settings, while the UNC coarse threads and Class 2B thread fit ensure quick, reliable engagement, reducing installation errors and downtime in production lines.

Specification Summary & Compliance

This thumb nut adheres to standard specifications, including a 1/4"-20 UNC coarse thread with Class 2B thread fit for precise dimensional accuracy and compatibility. The flange measures 7/8" in diameter with a 0.06" thickness, and the nut features a right-hand thread direction. It conforms to industry standards for inch-system measurements and is manufactured to meet general hardware requirements, ensuring reliability in various industrial applications.