S-90772A540 1/4"-20 x 3/4" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Surface Protection: Soft nylon tip prevents scratches and damage to sensitive surfaces during tightening
- Corrosion Resistance: Zinc-plated steel construction provides reliable protection against rust and environmental elements
- High Strength Performance: 40,000 psi tensile strength and Rockwell B71 hardness ensure durability in demanding applications
- Quick Manual Operation: Spade head design allows for easy hand-tightening without requiring tools
- Secure Fastening: Class 2A UNC coarse threads provide reliable engagement and vibration resistance
- Full Thread Engagement: Completely threaded shank maximizes holding power across the entire length
- Regulatory Compliance: Meets RoHS 3 and REACH environmental standards for safe industrial use
Professional Applications & Engineering Value
This zinc-plated steel thumb screw with protective nylon tip addresses critical challenges in industrial assembly and maintenance. The spade head design enables rapid installation and removal in applications requiring frequent access, while the soft nylon tip eliminates marring on finished surfaces, electronic enclosures, and precision equipment. The 1/4"-20 UNC coarse thread with Class 2A fit ensures quick engagement and reliable performance in metal, plastic, and composite materials. Engineered for 40,000 psi tensile strength, this thumb screw maintains integrity in vibration-prone environments, making it ideal for panel mounting, equipment covers, and access panels across manufacturing, electronics, and machinery sectors where both security and surface protection are paramount.
Specification Summary & Compliance
This thumb screw features 1/4"-20 UNC coarse threads with Class 2A dimensional accuracy and right-hand threading direction. The fully threaded design provides consistent engagement throughout the 3/4" length. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage in industrial applications. The combination of zinc-plated steel construction and nylon tip meets industry standards for corrosion resistance and surface protection requirements.
