S-91746A412 1/4"-20 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 operation with knurled round head providing superior grip and torque application without tools
- Exceptional corrosion resistance from 18-8 stainless steel construction for long-term reliability in demanding environments
- Optimized low-profile design (3/16" head height) allows clearance in space-constrained applications
- High mechanical strength with 80,000 psi tensile strength and Rockwell B83 hardness for durable performance
- Precision threading with Class 2A UNC coarse threads ensuring reliable engagement and vibration resistance
- Regulatory compliance meeting RoHS 3 and REACH standards for safe use across industrial sectors
- Versatile partial threading (11/16" thread length) providing both secure fastening and smooth shaft guidance
Professional Applications & Engineering Value
This low-profile knurled thumb screw delivers exceptional value in applications requiring frequent manual adjustments and reliable fastening. The 18-8 stainless steel construction provides superior corrosion resistance, making it ideal for electronics enclosures, machinery access panels, and laboratory equipment where environmental exposure is a concern. The UNC coarse threading and Class 2A thread fit ensure quick installation and secure holding power, while the knurled round head offers positive grip even with gloved hands. Engineers specify this partially threaded thumb screw for applications demanding both precise positioning and rapid access, eliminating the need for tools in maintenance-heavy environments. The combination of 80,000 psi tensile strength and Rockwell B83 hardness ensures durability through repeated cycles of tightening and removal.
Specification Summary & Compliance
This thumb screw features precision 1/4"-20 UNC coarse threads with Class 2A thread fit tolerance for reliable engagement. The partially threaded design provides 11/16" of threading on a 3/4" overall length. Manufactured from 18-8 stainless steel with knurled round head measuring 3/4" diameter and 3/16" height. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.
