S-91404A550 1/4"-20 x 2" Thumb Screws
Thumb Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Effortless manual tightening with a wide 1 3/8" wing head design, eliminating the need for tools and speeding up assembly in tight spaces.
- Superior corrosion resistance from zinc-plated iron construction, ensuring long-lasting performance in humid or industrial environments.
- Reliable thread engagement with UNC coarse threading and Class 2A fit, providing secure fastening and reducing cross-threading risks.
- Full 2" threading for maximum adjustability and grip across various material thicknesses in repetitive assembly tasks.
- Consistent dimensional accuracy with head diameter tolerance of -0.0156" to 0.0156", ensuring uniform fit in standardized applications.
- Compliance with strict environmental standards including RoHS 3 and REACH, making it safe for use in regulated industries.
- Right-hand thread direction for intuitive installation that aligns with common manual fastening practices.
Professional Applications & Engineering Value
This zinc-plated iron thumb screw is engineered to address common challenges in industrial settings where tool-free access and durability are critical. The UNC coarse thread and Class 2A fit ensure quick, reliable fastening in equipment panels, electrical enclosures, and machinery guards, reducing assembly time and minimizing thread wear. The wing head design offers a secure grip even with gloves, ideal for maintenance-heavy environments. Its zinc plating provides a protective barrier against oxidation, extending service life in moist or corrosive conditions. Fully threaded along its 2" length, it accommodates varying material depths, making it a versatile choice for prototyping, OEM assemblies, and field service applications where manual adjustments are frequent.
Specification Summary & Compliance
This thumb screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. It features a 1/4"-20 thread size, coarse thread spacing, and right-hand thread direction. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
