S-98704A705 1/4"-28 x 3/8" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior grip and torque application with knurled black acetal plastic head for reliable hand-tightening without tools
- Excellent corrosion resistance from 18-8 stainless steel construction, ideal for demanding industrial environments
- Precise thread engagement with Class 3A fit and 1/4"-28 UNF fine threads ensuring vibration-resistant fastening
- Space-saving low-profile design with round head shape for applications with limited clearance
- Wide operational temperature range (32° to 180°F) maintaining performance across various working conditions
- Tool-free installation and adjustment through combination of thumb head and optional hex drive for flexibility
- Environmental compliance assurance meeting RoHS 3 and REACH standards for global manufacturing requirements
Professional Applications & Engineering Value
This low-profile thumb screw delivers exceptional value in applications requiring frequent adjustments and reliable fastening. The 18-8 stainless steel construction provides inherent corrosion resistance, while the black finish enhances durability in visible assemblies. Engineered with Class 3A thread fit and 1/4"-28 UNF fine threads, it ensures precise alignment and vibration resistance in precision equipment, electronic enclosures, and instrumentation panels. The knurled acetal plastic head offers superior tactile grip even in oily conditions, eliminating the need for tools during maintenance cycles. This combination of materials and precision threading solves common industrial challenges of corrosion, space constraints, and repetitive adjustment requirements.
Specification Summary & Compliance
This thumb screw features 1/4"-28 UNF fine threads with Class 3A fit for high-precision applications, manufactured to standard inch system specifications. The product is fully threaded with right-hand thread direction and includes both thumb and 3/16" hex drive options for installation flexibility. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures suitability for global industrial markets and restricted substance requirements.
