Pin

Main Functions
Positioning and alignment of parts
Securing components against relative movement
Transmitting light torque or shear force
Locking bolts, shafts, or other fasteners
Common Types
Cotter pin: Used with slotted nuts to prevent loosening, widely in machinery and vehicles.
Straight pin / Dowel pin: Precision cylindrical pin for accurate positioning.
Taper pin: Tapered shape for firm fitting and easy assembly.
Spring pin: Elastic cylindrical pin, shock‑resistant and convenient to install.
Roll pin: Hollow coiled pin, used for light‑to‑medium load connections.
Features
Simple structure, small size, low cost
High shear resistance
Easy to assemble and disassemble
Stable performance under vibration
Applications
Pins are commonly used in machinery, automobiles, motorcycles, furniture, aerospace, instrumentation, and various assembly structures requiring positioning or anti‑loosening locking.