S-90179A581 5/16"-18 x 3/4" 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 manual tightening and loosening with comfortable 3/4" high spade head design requiring no tools
- Superior load distribution and anti-loosening performance thanks to the integrated 0.563" flange
- Exceptional mechanical strength and wear resistance provided by steel construction with 40,000 psi tensile strength and Rockwell B55 hardness
- Fast installation and reliable thread engagement with fully threaded 5/16"-18 UNC coarse threads
- Consistent, precision fit ensured by Class 2A thread fit for smooth assembly
- Durable, long-lasting performance in demanding industrial environments with right-hand threading
- Compliance with environmental safety standards through RoHS 3 (2015/863/EU) compliance
Professional Applications & Engineering Value
This high-strength steel thumb screw is engineered to solve critical challenges in industrial assembly and maintenance. The flanged spade head design provides superior grip and torque application without specialized tools, making it ideal for frequent access panels, machinery guards, and electronic enclosures. The fully threaded 5/16"-18 UNC coarse thread with Class 2A fit ensures quick, secure fastening in various materials, reducing installation time while maintaining vibration resistance. Manufactured from durable steel with 40,000 psi tensile strength, it withstands repeated use in manufacturing, automotive, and electronics applications where manual adjustments are common, delivering reliable performance without compromising on RoHS compliance for environmentally conscious operations.
Specification Summary & Compliance
This thumb screw features precision 5/16"-18 UNC coarse threads with Class 2A thread fit for consistent dimensional accuracy. It meets manufacturing specifications for steel fasteners, including Rockwell B55 hardness and 40,000 psi tensile strength. The product is fully RoHS 3 (2015/863/EU) compliant, ensuring adherence to environmental regulations for hazardous substance restrictions in industrial components.
