Product Introduction This 175-piece mixed specification parallel key and dowel pin assortment gathers common-size flat keys and cylindrical locating pins for mechanical transmission assembly and equipment maintenance, stored in classified storage box for machinery repair factories, lathe processing workshops and equipment maintenance technicians to realize rapid part replacement during equipment overhaul work. Core Features High-hardness carbon steel blank: Standard quenching treatment improves surface wear resistance under long-term gear rotation friction. Double round end parallel key molding: Arc-shaped two terminals facilitate quick embedding into gear shaft key groove during assembly operation. Classified compartment storage box: Separated lattice design sorts different specs apart to avoid part mixing and accelerate picking efficiency. Precision dimensional cutting: Strict tolerance control ensures tight matching with standard shaft and gear key slot size without loose assembly clearance. Product Advantages Pre-assembled multi-spec kit avoids emergency equipment shutdown caused by lacking matched locating parts during sudden mechanical breakdown, cutting production halt loss for processing factories. Hardened raw material outperforms ordinary soft steel pins on wear life, less prone to deformation after long-time mechanical rotation load. Classified box storage optimizes workshop part management, eliminating messy scattered small hardware storage troubles. Applicable Scenarios Suitable for lathe, motor, reducer gear assembly fixation, agricultural machinery transmission part maintenance, small pump equipment overhaul and DIY mechanical model assembling construction. Purchase Value Full-spec bulk package satisfies long-term sporadic maintenance and assembling needs, one set replaces repeated small-batch customized procurement of different single-size pins and keys, effectively lowering hardware procurement cost for machinery maintenance departments.