Ningbo Chenglong Special Steel Co., Ltd. was established in 1992 and specializes in selling products from famous domestic special steel companies. After more than ten years of hard work, it has developed into a sales and distribution center integrating warehousing, processing and inspection. Annual sales of more than 200,000 tons of special steel. And it has established a long-term and stable supporting relationship with large-scale leading enterprises in plastic machinery, auto and motorcycle parts, hardware and other industries inside and outside the province. The company is located at No. 625, Zhenning East Road, Zhenhai District, Ningbo City, Zhejiang Province.
Our Products
Our Products
High quality threaded rod, stud bolt, bolt, washer, nut, etc.
Standard: Din975, A193, Jin, Bs, Din931, Din933, A10, A325, A325M.
Material: alloy steel, stainless steel, carbon steel.
Surface: Galvanized steel plate (ZP), heat treatment, black, bright color, Teflon, Dacromet.
Grades: 4.8,8.8,10.9,B7,L7,B16.
Diameter: 1/4-53/4 ",M8 - M100.
Length: 16 mm - 6000 mm.
Production capacity: 1500 tons per month.
Delivery time: 2–4 weeks after confirming the order
Product Video
Product Video
Latest News
Latest News
Xingsheng Factory Map-null
Xingsheng Factory Map
Production Equipment-null
Production Equipment
Testing Equipment-null
Testing Equipment
Factory workshop-null
Factory workshop
Company annual meeting-
Company annual meeting
Ningbo Chenglong Special Steel Co., Ltd. convened its 2024 annual meeting under the leadership of the General Manager. During the meeting, the General Manager highlighted the challenges faced during the year and outlined the strategic direction for the company's future business development. Additionally, specific work requirements were set for each salesperson. The sales team also delivered enthusiastic presentations during the conference.
Hexagon bolts Teflon （PTFE）-
Hexagon bolts Teflon （PTFE）
Teflon hexagonal bolt is a kind of hexagonal bolt with Teflon coating. Teflon, also known as polytetrafluoroethylene iron (PTFE) , is a synthetic polymer with excellent chemical resistance. This coating gives the bolts excellent corrosion resistance, high temperature resistance and anti-adhesion. Teflon hexagon bolts are commonly used in mechanical equipment and structures that need to withstand high temperature, strong corrosion or viscous environments. The Teflon coating can effectively prevent the bolts from reacting with the chemical substances in the surrounding environment, thus prolonging the service life of the bolts. In addition, the lubricity of the Teflon coating also reduces friction between the bolt and the nut, making the fastener easier to disassemble and maintain. When choosing Teflon hexagon bolt, it is necessary to pay attention to its size, material and coating quality and other factors. In addition, in order to ensure the safety and reliability of bolts, it is recommended to carry out adequate testing and verification before use.
Xingsheng Factory Map-null
Xingsheng Factory Map
Production Equipment-null
Production Equipment
Testing Equipment-null
Testing Equipment
Factory workshop-null
Factory workshop
Company annual meeting-
Company annual meeting
Ningbo Chenglong Special Steel Co., Ltd. convened its 2024 annual meeting under the leadership of the General Manager. During the meeting, the General Manager highlighted the challenges faced during the year and outlined the strategic direction for the company's future business development. Additionally, specific work requirements were set for each salesperson. The sales team also delivered enthusiastic presentations during the conference.
Hexagon bolts Teflon （PTFE）-
Hexagon bolts Teflon （PTFE）
Teflon hexagonal bolt is a kind of hexagonal bolt with Teflon coating. Teflon, also known as polytetrafluoroethylene iron (PTFE) , is a synthetic polymer with excellent chemical resistance. This coating gives the bolts excellent corrosion resistance, high temperature resistance and anti-adhesion. Teflon hexagon bolts are commonly used in mechanical equipment and structures that need to withstand high temperature, strong corrosion or viscous environments. The Teflon coating can effectively prevent the bolts from reacting with the chemical substances in the surrounding environment, thus prolonging the service life of the bolts. In addition, the lubricity of the Teflon coating also reduces friction between the bolt and the nut, making the fastener easier to disassemble and maintain. When choosing Teflon hexagon bolt, it is necessary to pay attention to its size, material and coating quality and other factors. In addition, in order to ensure the safety and reliability of bolts, it is recommended to carry out adequate testing and verification before use.
Xingsheng Factory Map-null
Xingsheng Factory Map
Production Equipment-null
Production Equipment
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