S-91185A507 5/16"-18 x 1 1/2" 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
- Superior grip and torque application with knurled Acetal plastic head for reliable hand-tightening without tools
- Corrosion-resistant 18-8 stainless steel construction ensures long-lasting performance in various industrial environments
- Precise Class 3A thread fit provides secure fastening with minimal backlash in UNC coarse thread applications
- Low-profile round head design offers space-saving installation where clearance is limited
- Wide temperature tolerance (32° to 180° F) maintains performance across diverse operating conditions
- Fully threaded shank allows for maximum adjustment flexibility and consistent engagement
- Environmental compliance with RoHS 3 and REACH regulations ensures safe use in regulated industries
Professional Applications & Engineering Value
This low-profile thumb screw combines the corrosion resistance of 18-8 stainless steel with the exceptional grip properties of a knurled Acetal plastic head, creating an ideal solution for frequent adjustment applications in electronics, machinery, and instrumentation. The 5/16"-18 UNC coarse threads with Class 3A fit provide rapid installation and removal while maintaining vibration resistance in assemblies requiring regular maintenance access. The fully threaded design ensures consistent engagement depth across various material thicknesses, while the right-hand thread direction offers intuitive operation for technicians. Engineered for environments where tool-less fastening is essential, this thumb screw delivers reliable performance in panel mounting, access covers, and equipment calibration systems where repeated adjustments are common.
Specification Summary & Compliance
This thumb screw features 5/16"-18 UNC coarse threads with Class 3A precision fit and right-hand thread direction. The fastener is fully threaded with a total length of 1-1/2 inches and manufactured from 18-8 stainless steel with an Acetal plastic head. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for use in regulated industries and applications requiring compliance with international standards.
