Square Head Coarse Thread Fractional Size Cup Point Set Screw w/ Plain Finish
Square Head Coarse Thread Cup Point Set Screws
Fractional Sizes with Plain Finish for Reliable Shaft Locking
Square head coarse thread fractional size cup point set screws with a plain finish are dependable fastening solutions designed to secure components firmly to shafts and assemblies in industrial and mechanical applications. Featuring a square head for easy wrench installation, these set screws allow precise torque control and quick adjustments in confined or hard-to-reach spaces.
Cup Point Design
Strong Holding Power and Vibration Resistance
The cup point tip is engineered with a concave cutting edge that bites into the mating surface, creating exceptional holding strength. This design resists loosening caused by vibration or rotational forces, making cup point set screws ideal for securing pulleys, gears, collars, and couplings. The coarse thread profile provides increased grip in softer materials and ensures faster assembly with fewer turns compared to fine threads.
Fractional Coarse Thread Specifications
Optimized for Industrial Compatibility
Manufactured in fractional UNC coarse thread sizes, these square head set screws are compatible with standard inch-based components commonly used in North American industrial equipment. The coarse threads enhance load-bearing capability and improve performance in applications where debris, surface irregularities, or frequent adjustments may be present.
Plain Finish Construction
Dimensional Accuracy and Versatility
The plain finish offers a clean, untreated surface that maintains precise thread dimensions and shoulder geometry. This finish is well-suited for indoor or controlled environments where additional corrosion protection is not required. It also allows for secondary finishing or plating if application-specific coatings are needed.
Durable Materials and Performance
Built for Demanding Applications
Typically manufactured from high-strength carbon steel, these set screws provide excellent shear strength, wear resistance, and long-term durability under mechanical stress. Precision machining ensures consistent thread engagement and reliable performance across repeated installations.
Common Applications
Versatile Solutions for Mechanical Assemblies
Square head coarse thread cup point set screws are widely used in power transmission systems, industrial machinery, automotive components, agricultural equipment, and maintenance repair operations. Their secure bite, easy installation, and rugged design make them a trusted choice for professionals who require dependable shaft-locking performance in fractional size applications.