Product: GB879 Elastic Cylindrical Spring Pins (Roll Pins) — Carbon Steel Key benefits Secure, removable fastening: The GB879 spring pins provide reliable press-fit retention for shafts, gears, collars, and components while still allowing disassembly when needed. Elastic, vibration-resistant connection: Made as elastic cylindrical spring pins, they absorb shock and resist loosening under vibration better than straight dowel pins. Simple, repeatable installation: Designed for straightforward insertion into drilled holes; no threading required for fast alignment and assembly. Wide size range for compatibility: Available in M1.5, M2, M2.5, M3, M4, M5, M6, and M8 to match common metric hole sizes and assembly requirements. Product details Model: GB879 Material: Carbon steel Type: Elastic cylindrical spring pin (roll pin) Sizes: M1.5 / M2 / M2.5 / M3 / M4 / M5 / M6 / M8 What these pins do Provide axial location and retention between mating parts without permanent deformation Compensate for minor misalignment with spring action, reducing stress on housings and shafts Act as shear or positioning elements in mechanical assemblies Typical applications Small mechanical assemblies and consumer electronics: Locating and holding gears, levers, and shafts where compact, removable fasteners are required. Automotive and machinery repairs: Securing linkage pins, brackets, or pivot points subject to vibration and occasional disassembly. Industrial equipment and fixtures: Positioning components, fixtures, or jigs where precise alignment and shock resistance are needed. Selection and use tips Choose the pin diameter that matches the hole and intended fit; the elastic design provides interference fit and retention. Install with a press or light hammer using a suitable driver to avoid damage to the pin or surrounding parts. Carbon steel offers good strength; if corrosion resistance is required, consider appropriate surface treatment or alternative materials (not included in this product specification). Ordering information Model GB879, carbon steel spring pins in sizes M1.5 through M8 as listed above. This product description reflects the GB879 specification and the listed material and sizes.