S-99607A245 1/4"-28 x 7/8" 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
- Superior manual grip with knurled head texture for secure, tool-free operation in tight spaces
- Exceptional corrosion resistance thanks to 18-8 stainless steel construction for long service life in harsh environments
- High-strength performance with 80,000 psi tensile strength and Rockwell B85 hardness for reliable load-bearing applications
- Precise thread engagement with Class 2A UNF fine threads ensuring vibration-resistant, secure fastening
- Full-threaded design providing maximum holding power along the entire 7/8" length
- Flared collar profile distributing load evenly and preventing surface damage during tightening
- Regulatory compliance meeting RoHS 3 and REACH standards for safe use across industrial sectors
Professional Applications & Engineering Value
This 18-8 stainless steel thumb screw delivers exceptional value in applications requiring frequent adjustments or tool-free maintenance. The knurled head design provides positive grip even with gloved hands, while the corrosion-resistant material ensures reliable performance in demanding environments like manufacturing equipment, electronic enclosures, and outdoor machinery. The 1/4"-28 UNF fine thread configuration offers superior vibration resistance compared to coarse threads, making it ideal for precision instruments and assemblies subject to movement. The fully threaded construction allows for maximum engagement depth, providing secure fastening across various material thicknesses without compromising structural integrity.
Specification Summary & Compliance
This thumb screw features precision Class 2A thread fit with 1/4"-28 UNF fine threads in right-hand direction, ensuring consistent mating with standard UNF nuts and threaded holes. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material transparency. The round head with flared collar (31/64" diameter) provides enhanced bearing surface, while the 37/64" head diameter and 1/4" head height deliver optimal manual operation comfort.
