S-90772A581 5/16"-18 x 3/4" 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
- Surface Protection: Soft nylon tip prevents damage to contact surfaces during tightening, ideal for delicate equipment and repeated adjustments.
- High Tensile Strength: 40,000 psi tensile strength ensures reliable, heavy-duty fastening for demanding industrial applications.
- Corrosion Resistance: Zinc-plated steel construction provides enhanced durability and rust protection in various operating environments.
- Quick Manual Operation: Spade-shaped thumb head design allows for easy hand-tightening and removal without requiring tools.
- Secure Thread Engagement: Class 2A UNC coarse threads offer excellent grip and vibration resistance, maintaining joint integrity.
- Full Thread Coverage: Fully threaded shank provides maximum adjustability and holding power along the entire fastener length.
- Regulatory Compliance: Meets RoHS 3 and REACH environmental standards, ensuring safe use in regulated industries.
Professional Applications & Engineering Value
This zinc-plated steel thumb screw combines mechanical strength with operational convenience, addressing common challenges in industrial maintenance and assembly. The Rockwell B71 hardness ensures the fastener withstands repeated use without deformation, while the soft nylon tip eliminates marring on finished surfaces—critical in electronics, machinery panels, and precision equipment. The UNC coarse thread design facilitates quick installation and provides superior resistance to loosening under vibration, making it ideal for applications requiring frequent access or adjustments. With a 3/4" length and fully threaded body, it offers versatile clamping solutions across various material thicknesses, enhancing workflow efficiency in manufacturing, automotive, and enclosure systems.
Specification Summary & Compliance
This thumb screw features a 5/16"-18 UNC coarse thread with Class 2A tolerance for consistent fit and performance. Manufactured from zinc-plated steel, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring environmental safety and regulatory adherence. The fastener is fully threaded with right-hand direction and includes precise dimensional attributes: head width of 7/8", head height of 43/64", and a 3/32" long nylon tip with 3/16" diameter.
