S-90079A548 1/4"-20 x 2" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced grip and corrosion resistance with knurled black-oxide steel head for secure manual tightening in demanding environments
• Quick and easy hand adjustments thanks to the low-profile round head design requiring no tools
• Reliable coarse thread engagement with 1/4"-20 UNC threads for faster assembly and reduced cross-threading risk
• Versatile fastening for various material thicknesses with a partially threaded 2" length and 1 5/8" thread length
• Precise fit and consistent performance ensured by Class 2A thread fit for dependable industrial use
• Simplified alignment and insertion with the extended tip design for faster production cycles
• Environmentally responsible manufacturing with RoHS 3 compliance, meeting strict regulatory standards

Professional Applications & Engineering Value

This low-profile thumb screw is engineered for applications where tool-less access and frequent adjustments are critical. The black-oxide steel construction provides a durable, corrosion-resistant finish ideal for industrial environments, electronics enclosures, and machinery panels. The coarse UNC thread and Class 2A fit ensure rapid installation and reliable holding power, reducing assembly time while minimizing the risk of thread stripping. The knurled head offers superior manual grip even with oily hands, making it perfect for maintenance access panels, calibration points, and equipment where quick disassembly is required without specialized tools.

Specification Summary & Compliance

This thumb screw features a 1/4"-20 UNC coarse thread with Class 2A fit for standard industrial tolerance. It is manufactured from steel with a black-oxide finish and is RoHS 3 (2015/863/EU) compliant with exemption 6(a)-I for lead as an alloying element in steel. The component meets standard dimensional specifications for right-hand threaded, partially threaded thumb screws with an extended tip design.