S-91185A503 5/16"-18 x 1 1/4" 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
- Enhanced grip and comfort with knurled acetal plastic head for secure manual tightening without tools
- Superior corrosion resistance from 18-8 stainless steel construction, ideal for humid or demanding environments
- Precise thread engagement with Class 3A UNC coarse threads ensuring reliable, vibration-resistant fastening
- Space-saving low-profile design allowing installation in tight clearance applications
- Wide temperature tolerance (32° to 180°F) for stable performance across various operating conditions
- Full threading providing consistent holding power along the entire 1-1/4" length
- Environmental compliance meeting RoHS 3 and REACH standards for safe industrial use
Professional Applications & Engineering Value
This low-profile thumb screw combines the strength of 18-8 stainless steel with the practical benefits of a knurled acetal plastic head to address common assembly challenges. The coarse UNC thread and Class 3A fit enable quick installation and removal while maintaining secure fastening in vibration-prone equipment. Engineers specify this component for industrial applications requiring frequent access panels, electronic enclosures, and machinery covers where tool-less operation improves maintenance efficiency. The plastic head eliminates galvanic corrosion concerns when mating with dissimilar metals while providing electrical insulation. With full threading along its 1-1/4" length, it delivers uniform clamping force perfect for securing components of varying thicknesses in manufacturing and automation systems.
Specification Summary & Compliance
Manufactured to precise dimensional standards with 5/16"-18 UNC coarse threads and Class 3A thread fit for superior engagement. The fully threaded design maintains consistent performance across the entire 1-1/4" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial and commercial applications worldwide.
