S-90079A546 1/4"-20 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual torque application with 1" knurled head for superior grip without tools
• Corrosion-resistant performance through black-oxide steel construction
• Quick installation in various materials with coarse 1/4"-20 UNC threading
• Precise component alignment using extended 0.125" tip design
• Reliable thread engagement with Class 2A fit for consistent fastening
• Low-profile round head for space-constrained applications
• Environmental compliance assurance meeting RoHS 3 standards

Professional Applications & Engineering Value

This black-oxide steel thumb screw delivers exceptional value in industrial settings where frequent adjustments and tool-free operation are critical. The knurled head texture provides maximum finger grip for high-torque applications in machinery, electronic enclosures, and jig fixtures. The coarse UNC threading ensures rapid installation in soft materials and prevents cross-threading, while the extended tip facilitates perfect alignment in pre-tapped holes. Engineered for heavy-duty thumb screw applications, its partially threaded design concentrates engagement where needed most, making it ideal for production lines, maintenance panels, and equipment requiring regular access.

Specification Summary & Compliance

Manufactured to precise 1/4"-20 UNC thread specifications with Class 2A thread fit tolerance for consistent performance. Features right-hand thread direction and coarse thread spacing for rapid assembly. Compliant with RoHS 3 (2015/863/EU) regulations with exemption 6(a)-I for lead as an alloying element in steel, ensuring environmental responsibility in industrial applications.