S-91745A539 1/4"-20 x 5/8" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Effortless hand-tightening with a wide spade head design for superior grip and quick installation without tools
- Excellent corrosion resistance from 18-8 stainless steel construction, ideal for humid or harsh industrial environments
- Reliable coarse threading (UNC) ensures faster assembly and reduced cross-threading risk in various materials
- Precise Class 2A thread fit provides consistent engagement and secure fastening with standard mating parts
- Fully threaded shank allows for maximum adjustability and holding power along the entire length
- Compliant with RoHS 3 and REACH regulations for safe use in regulated industries and global market acceptance
- Durable right-hand thread design offers familiar, standardized operation for maintenance and assembly teams
Professional Applications & Engineering Value
This 1/4"-20 spade head thumb screw delivers exceptional value in applications requiring frequent adjustments or tool-less operation. The 18-8 stainless steel material resists rust and corrosion, making it suitable for electrical enclosures, machinery guards, and outdoor equipment where environmental exposure is a concern. The coarse UNC threading and Class 2A fit prevent stripping in softer materials and ensure reliable performance in high-vibration settings. Its fully threaded design provides consistent clamping force, solving common issues with partial-thread fasteners in alignment-critical assemblies. Engineers specify this thumb screw for maintenance panels, prototyping, and production jigs where speed, durability, and compliance with RoHS and REACH are paramount.
Specification Summary & Compliance
This thumb screw features a 1/4"-20 UNC coarse thread with Class 2A fit for standard tolerance and interchangeability. It is manufactured from 18-8 stainless steel and is fully threaded with a right-hand thread direction. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent industrial safety and environmental standards for hazardous substance restrictions.
