@jacqueslees: Metro Anchor Bolts (Rail Fastening Anchor Bolts) As the main artery of urban public transport, rail transit serves the bulk of passenger flow and is directly linked to every aspect of city residents' travel, work, shopping and daily life; therefore, its safety is of vital importance. The track structure is the substructure foundation of urban rail transit, and the fastening system is one of its core components. Its function is to clamp the rails tightly to the track bed below, forming a stable and reliable integral structure that ensures safe train operation. A fastening system consists of multiple parts; the clamping force of the elastic clip (spring clip) on the rail can only be achieved through the anchor bolt. Once the bolt fails, the integrity and stability of the track structure, as well as the safety of train operation, will be compromised. Our company manufactures and supplies metro anchor bolts to customers' requirements or samples. Please advise the following product specifications when inquiring, and we will provide you with a professional quotation and service: Property class: 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, or as specified by the customer Material grade: Q235, 35# steel, 45# steel, or as specified by the customer Surface treatment: self-color (oiled), black oxide (blackening), hot galvanizing, hot-dip galvanizing, Dacromet, zinc-based chromate, sherardizing (powder zincizing), multi-element composite sherardizing, or as specified by the customer Dimensions: to the customer's specified standard or drawing

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