S-91882A437 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
- Enhanced manual grip with knurled 1-1/4" round head and raised profile for slip-resistant operation without tools
- Superior corrosion resistance from black-oxide steel finish, extending service life in demanding environments
- High load-bearing capacity with 70,000 psi tensile strength and Rockwell B84 hardness for reliable heavy-duty applications
- Quick assembly compatibility through fully threaded 5/16"-18 UNC coarse threads with Class 2A fit for easy installation
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe industrial use
- Optimized torque transfer via right-hand thread direction and knurled collar for secure fastening control
Professional Applications & Engineering Value
This black-oxide steel thumb screw delivers exceptional value in industrial settings where manual adjustments and frequent access are required. The knurled head texture combined with a 1-1/4" diameter provides maximum finger grip, eliminating the need for tools during operation - ideal for machinery panels, electronic enclosures, and prototyping fixtures. The UNC coarse threading ensures rapid engagement with mating components, while the Class 2A thread fit maintains consistent alignment without binding. Engineered with 70,000 psi tensile strength, it withstands repeated cycling in vibration-prone applications, from automotive assemblies to production jigs. The raised round-head profile offers enhanced leverage for operators wearing gloves, making it particularly valuable in manufacturing and maintenance environments where speed and reliability are critical.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread tolerance for consistent fit. Features 5/16"-18 UNC coarse threads with right-hand direction and full threading along the 3/4" length. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a)-I and REACH (EC 1907/2006) regulations, ensuring environmental safety in industrial applications. The black-oxide surface treatment provides additional corrosion protection while maintaining the steel substrate's mechanical properties.
