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Because the bolt is also a kind of railway accessories, railway accessories is a component of the railway line, the track referred to here includes rail, sleeper, connecting parts, track bed, anti-climbing equipment, rail support and turnout, etc..
As an integral engineering structure, the track lays on the roadbed, plays a guiding role in the train operation, and directly bears the huge pressure of the locomotive and vehicle and its load.Under the dynamic action of the train operation, its various components must have sufficient strength and stability to ensure the train in accordance with the specified maximum speed, safe, smooth and uninterrupted operation.
Bolt: A type of fastener consisting of a head and a screw (cylindrical body with external thread), fitted with a nut, for fastening two parts with through holes.
Hot upsetting process:
Hot heading: refers to the raw materials after heating for stamping, the specific use of no special requirements, under normal circumstances are required to use cold heading, because of such a surface finish, material composition will be more compact, there is a larger workpiece often used hot heading processing.
PLASTIC BAG+CARTON+WOOD FIX PALLET
EACH BAG AROUND 3-4KG AND 25KG PER CARTON AND LESS THAN 900KG PER PALLET
A: We are factory.
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
A: Payment<=10000USD, 100% in advance. Payment>=10000USD, 50% T/T in advance ,balance before shippment.