Engineering machinery accessories are the core loss and fastening assembly of engineering machinery equipment such as excavators, loaders, bulldozers, and track equipment, covering three major categories of core components: chassis walking, bucket wear resistance, and whole machine fastening. They ensure the stable operation of basic functions such as equipment walking, excavation, load-bearing, and connection, and are widely applicable to various engineering scenarios such as municipal infrastructure, mining, sand and gravel processing, tunnel construction, and river dredging. The complete set of supporting products includes two series: high-strength fasteners and wear-resistant and vulnerable parts. Fasteners include track plate bolts, bucket teeth pins, segmented step bolts, various standard bolts, bolts, nuts, anti loosening connectors, etc. They are made of 40Cr, 42CrMo alloy steel, stainless steel and other raw materials, processed by cold heading forming, precision rolling, quenching and tempering heat treatment, with a strength of up to 8.8-12.9 levels. The flange is thickened, stepped positioning, self-locking and anti loosening specialized structural design, resistant to vibration and tension, and suitable for long-term bumpy and heavy load conditions of equipment; Wear resistant and vulnerable parts include excavator bucket teeth, gear seats, and other bucket accessories. The combination of multiple alloy materials and professional quenching technology ensures high toughness and strong wear resistance, effectively resisting ore impact and sand and gravel friction, greatly reducing the frequency of accessory replacement. The entire series of supporting parts comply with the specialized production standards for construction machinery, with strict control of dimensional tolerances in CNC precision machining, uniform accuracy of threads and mating surfaces, and strong interchangeability; The surface can provide various anti-corrosion and wear-resistant treatments such as blackening, galvanizing, Dacromet, and high-temperature hardening. It is resistant to mud, rain, salt spray, and sand and gravel erosion, and is not easy to rust, lock, break, or fall off after long-term use. Each batch of products undergoes multiple quality inspections such as tensile testing, hardness testing, impact fatigue testing, and thread gauge testing, ensuring stable and reliable mechanical properties. The product is compatible with mainstream brands of large, medium, and small tracked construction machinery on the market, with sufficient stock of standard specifications. At the same time, it supports customized extension, thickening, and irregular non standard kits based on equipment models, drawings, and samples. Complete set of accessories in one stop, reducing multi-channel procurement costs, effectively reducing equipment downtime and maintenance losses, improving the efficiency of continuous construction operations, and providing stable and durable complete machine matching solutions for engineering machinery manufacturers, maintenance parts suppliers, and construction units.