S-98704A915 5/16"-24 x 7/8" 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
- Tool-free, rapid installation with a knurled acetal plastic head providing superior grip even with gloves or oily hands
- Exceptional corrosion resistance from 18-8 Stainless Steel construction, ensuring long-term reliability in demanding environments
- Precise, vibration-resistant fastening with a Class 3A fine (UNF) thread fit for superior accuracy and holding power
- Durable, non-marring black finish that offers a professional appearance and added protection against wear
- Low-profile round head design for use in tight spaces and applications requiring a smooth, snag-free profile
- Versatile temperature performance with a head rated for 32° to 180° F, suitable for a wide range of industrial settings
- Global compliance assurance by meeting RoHS 3 and REACH standards, facilitating use in regulated markets
Professional Applications & Engineering Value
This 5/16"-24 UNF thumb screw is engineered to solve common assembly challenges where speed, precision, and durability are paramount. The 18-8 Stainless Steel body provides excellent resistance to rust and corrosion, making it ideal for electronics enclosures, machinery panels, and laboratory equipment. The knurled acetal plastic head ensures a secure, non-slip grip, allowing for repeated manual adjustments without the need for tools, which streamlines maintenance and reduces assembly time. The Class 3A fine thread offers superior engagement and clamping force, minimizing the risk of loosening under vibration, a critical feature in automotive, aerospace, and precision instrument applications. Its fully threaded design and low-profile round head provide consistent fastening strength and a flush fit, enhancing both safety and aesthetics in finished products.
Specification Summary & Compliance
This thumb screw adheres to the UNF (Unified National Fine) thread standard with a Class 3A tolerance for high-precision fit. It is fully threaded with a right-hand direction and a fine thread spacing. The product is manufactured to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent international regulations for hazardous substances.
