S-99607A241 1/4"-28 x 3/4" 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
- Enhanced grip and torque application with knurled round head and flared collar design for secure manual tightening in tight spaces
- Superior corrosion resistance and durability thanks to 18-8 stainless steel construction, ideal for harsh industrial environments
- High tensile strength of 80,000 psi ensures reliable load-bearing capacity and reduces risk of fastener failure
- Precision Class 2A thread fit with UNF fine threading for smooth engagement and vibration resistance in assemblies
- Full threading along the 3/4" length provides maximum adjustability and holding power across the entire fastener
- Rockwell B85 hardness maintains thread integrity and resists wear during repeated installations
- Compliance with RoHS 3 and REACH regulations guarantees safe, environmentally responsible use in global markets
Professional Applications & Engineering Value
These 18-8 stainless steel thumb screws are engineered to solve common assembly challenges where tools are impractical or speed is critical. The knurled head and flared collar deliver exceptional manual grip, reducing slippage and hand fatigue during frequent adjustments in electronics, machinery panels, and instrumentation. The 1/4"-28 UNF fine threads and Class 2A fit ensure precise, secure fastening in applications requiring vibration resistance, such as aerospace components or automotive controls. With full threading and high tensile strength, they provide consistent clamping force, making them ideal for maintenance-heavy environments where durability and quick access are paramount.
Specification Summary & Compliance
This thumb screw adheres to UNF thread standards with a Class 2A thread fit for consistent dimensional accuracy. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free of restricted hazardous substances. Manufacturing conforms to industry specifications for 18-8 stainless steel material properties, including hardness (Rockwell B85) and tensile strength (80,000 psi), supporting reliable performance in regulated sectors.
