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Head height matches the screw's thread diameter. Ideal for high-strength fastening applications.
Designed for deep holes or hard-to-reach setups. Head height is 1.5 times taller than a standard socket head.
Engineered for confined head space. Head height is about half that of a standard socket head. Not recommended for critical high-strength fastening.
Thread Sizing Guidelines:
Inch Thread Sizes: Specified by diameter and threads per inch. Diameter represents the screw size. For options under 1/4", sizes are denoted numerically (e.g., #10 or No.10).
Metric Thread Sizes: Defined by diameter and pitch (the distance between thread crests). For instance, M6 × 1 mm is coarse pitch, whereas M6 × 0.75 mm is fine pitch. If pitch is unspecified, coarse threads serve as the standard industrial choice.
Threading Types:
Fully Threaded Screws: Threaded entirely up to the head to engage tapped holes fully. Optimal for assemblies where lateral shear forces are minimal.
Partially Threaded Screws: Include a solid unthreaded shank beneath the head, offering superior shear strength and holding capacity under sideways loads. The plain shank is stronger than the threaded section. Usable thread lengths align with standard published specs up to fully threaded variants.
