S-98704A730 1/4"-28 x 1 1/8" 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
- Effortless hand-tightening with knurled acetal plastic head for secure grip without tools
- Corrosion-resistant performance from 18-8 stainless steel construction with black finish
- Precise thread engagement with Class 3A UNF fine threads ensuring reliable fastening
- Space-saving low-profile design ideal for compact assemblies and tight clearances
- Dual-operation capability with both thumb grip and 3/16" hex drive for installation flexibility
- Full-length threading provides consistent holding power along the entire 1 1/8" length
- Environmentally compliant meeting RoHS 3 and REACH standards for global applications
Professional Applications & Engineering Value
This low-profile thumb screw combines the corrosion resistance of 18-8 stainless steel with the ergonomic benefits of a knurled acetal plastic head, creating an ideal solution for frequent-adjustment applications in industrial settings. The Class 3A UNF fine threads deliver superior thread engagement and vibration resistance in machinery, electronic enclosures, and precision instruments. The black finish enhances both aesthetic appeal and additional corrosion protection, while the dual-operation design (thumb grip and hex drive) allows for quick adjustments without compromising torque requirements. Engineered for right-hand thread applications requiring reliable, repeated access, this fastener eliminates the need for tools in many maintenance scenarios, significantly reducing downtime in production environments.
Specification Summary & Compliance
This thumb screw features precision 1/4"-28 UNF fine threads with Class 3A thread fit for exceptional dimensional accuracy and reliable performance. Manufactured from 18-8 stainless steel with full threading along the 1 1/8" length, it maintains consistent mechanical properties across its operating temperature range (32° to 180° F). The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in various industrial and commercial applications worldwide.
