Technical Tables & Calculators

Thread Pitch Chart: Coarse vs. Fine Threads

Pitch is the distance between two adjacent thread crests, and it affects a bolt's strength and grip. Metric threads are divided into coarse and fine — for example, an M10 coarse thread has a 1.5 mm pitch, while its fine thread has a 1.25 mm pitch. Fine threads provide higher clamping force and are well suited to applications subject to vibration.

Samakkee Salukpan Co., Ltd. manufactures and supplies both coarse- and fine-thread bolts to ISO/DIN standards in every size.