china bolt manufacture 12.9 grade track bolt & Nuts for excavator

welcome to have your part numbers or drawings for customized production or buy standard ones from us.

Product Description：

BOLT &NUT（Plow bolt ，track bolt ，segment bolt ，hex bolt and customed bolt ）

12.9 on the Richter scale, as the top of the screw, has the very high hardness and tensile strength, the rockwell hardness (HRC) of 39-44, between the tensile strength of 1220 n/was, but because of the shape of the screw manufacturing is different, so using the same material production of countersunk hex socket screws (cup), round head hex socket screws (a round goblet) can only achieve the minimum tensile strength of 10.9 magnitude.It can also meet the high requirements of fasteners for special occasions and parts of industrial and mining enterprises.

We specialized in fastener for 20 years ,with good quality  and lowest price .

Processes:

First, we have our own high-precision Digital Machining center for mould making in special Mould Workshop, excellent mould make product beautiful appearance and its size accurately.

The second, we adopt blasting procession, removing Oxidation surface , make the surface to be bright and clean and uniform and beautiful.

The third, in heat treatment: We use the Digtal Controlled-atmosphere Automatic heat treatment Furnace, we also have four mesh belt convey furnaces, We can deal with the products in different sizes keeping the non-oxidation surface

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FAQ
Q: Are you trading company or manufacturer ?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 5-7 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.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.