S-91185A919 1/4"-20 x 5/8" 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
- Corrosion-resistant performance with 18-8 stainless steel construction for long-lasting reliability in humid or chemical environments
- Enhanced user comfort and grip from the black Acetal plastic head, reducing hand fatigue during repeated adjustments
- Precise, secure fastening ensured by Class 3A thread fit for minimal backlash and vibration resistance
- Quick installation and removal with coarse UNC threading and two-arm design for tool-free operation
- Full-thread engagement along the 5/8" length for maximum holding power in various material thicknesses
- Wide thermal compatibility with head temperature range of 32° to 180°F for diverse operating conditions
- Environmental compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
Professional Applications & Engineering Value
Engineered for industrial applications requiring frequent adjustments and reliable clamping, this 1/4"-20 thumb screw combines 18-8 stainless steel corrosion resistance with a durable black Acetal plastic head for ergonomic handling. The UNC coarse thread and Class 3A fit provide rapid installation with high vibration resistance, ideal for access panels, machinery guards, and electronic enclosures where tool-free access is critical. The fully threaded design ensures consistent clamping force across varying material depths, while the plastic head eliminates galvanic corrosion risks when mating with dissimilar metals. Suitable for maintenance fixtures, OEM equipment, and laboratory instruments operating within moderate temperature ranges.
Specification Summary & Compliance
This thumb screw features a 1/4"-20 UNC coarse thread with Class 3A fit for precision tolerance, manufactured from 18-8 stainless steel with a black Acetal plastic head. The product is fully threaded to 5/8" length and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for industrial and electronic applications requiring material safety standards.
