Table of Contents Executive Summary 1 Stud Bolts Market Overview 1.1 Product Overview and Scope of Stud Bolts 1.2 Stud Bolts Segment by Type 1.2.1 Global Stud Bolts Production Growth Rate Comparison by Type (2014-2025) 1.2.2 Fully Threaded 1.2.3 Double Ends (Threaded Both Ends Only) 1.2.4 Tap Ends (For Threaded Holes) 1.2.5 Step Downs (Ends Have Different Diameters) 1.3 Stud Bolts Segment by Application 1.3.1 Stud Bolts Consumption Comparison by Application (2014-2025) 1.3.2 Chemical Industry 1.3.3 Automotive 1.3.4 Machinery 1.3.5 Construction 1.3.6 MRO 1.3.7 Other 1.4 Global Stud Bolts Market by Region 1.4.1 Global Stud Bolts Market Size Region 1.4.2 North America Status and Prospect (2014-2025) 1.4.3 Europe Status and Prospect (2014-2025) 1.4.4 China Status and Prospect (2014-2025) 1.4.5 Japan Status and Prospect (2014-2025) 1.5 Global Stud Bolts Market Size 1.5.1 Global Stud Bolts Revenue (2014-2025) 1.5.2 Global Stud Bolts Production (2014-2025) 2 Global Stud Bolts Market Competition by Manufacturers 2.1 Global Stud Bolts Production Market Share by Manufacturers (2014-2019) 2.2 Global Stud Bolts Revenue Share by Manufacturers (2014-2019) 2.3 Global Stud Bolts Average Price by Manufacturers (2014-2019) 2.4 Manufacturers Stud Bolts Production Sites, Area Served, Product Types 2.5 Stud Bolts Market Competitive Situation and Trends 2.5.1 Stud Bolts Market Concentration Rate 2.5.2 Stud Bolts Market Share of Top 3 and Top 5 Manufacturers 2.5.3 Mergers & Acquisitions, Expansion 3 Global Stud Bolts Production Market Share by Regions 3.1 Global Stud Bolts Production Market Share by Regions 3.2 Global Stud Bolts Revenue Market Share by Regions (2014-2019) 3.3 Global Stud Bolts Production, Revenue, Price and Gross Margin (2014-2019) 3.4 North America Stud Bolts Production 3.4.1 North America Stud Bolts Production Growth Rate (2014-2019) 3.4.2 North America Stud Bolts Production, Revenue, Price and Gross Margin (2014-2019) 3.5 Europe Stud Bolts Production 3.5.1 Europe Stud Bolts Production Growth Rate (2014-2019) 3.5.2 Europe Stud Bolts Production, Revenue, Price and Gross Margin (2014-2019) 3.6 China Stud Bolts Production 3.6.1 China Stud Bolts Production Growth Rate (2014-2019) 3.6.2 China Stud Bolts Production, Revenue, Price and Gross Margin (2014-2019) 3.7 Japan Stud Bolts Production 3.7.1 Japan Stud Bolts Production Growth Rate (2014-2019) 3.7.2 Japan Stud Bolts Production, Revenue, Price and Gross Margin (2014-2019) 4 Global Stud Bolts Consumption by Regions 4.1 Global Stud Bolts Consumption by Regions 4.2 North America Stud Bolts Consumption (2014-2019) 4.3 Europe Stud Bolts Consumption (2014-2019) 4.4 China Stud Bolts Consumption (2014-2019) 4.5 Japan Stud Bolts Consumption (2014-2019) 5 Global Stud Bolts Production, Revenue, Price Trend by Type 5.1 Global Stud Bolts Production Market Share by Type (2014-2019) 5.2 Global Stud Bolts Revenue Market Share by Type (2014-2019) 5.3 Global Stud Bolts Price by Type (2014-2019) 5.4 Global Stud Bolts Production Growth by Type (2014-2019) 6 Global Stud Bolts Market Analysis by Applications 6.1 Global Stud Bolts Consumption Market Share by Application (2014-2019) 6.2 Global Stud Bolts Consumption Growth Rate by Application (2014-2019) 7 Company Profiles and Key Figures in Stud Bolts Business 7.1 Ciser Bolts and Nuts 7.1.1 Ciser Bolts and Nuts Stud Bolts Production Sites and Area Served 7.1.2 Stud Bolts Product Introduction, Application and Specification 7.1.3 Ciser Bolts and Nuts Stud Bolts Production, Revenue, Price and Gross Margin (2014-2019) 7.1.4 Main Business and Markets Served 7.2 U-Bolt-It 7.2.1 U-Bolt-It Stud Bolts Production Sites and Area Served 7.2.2 Stud Bolts Product Introduction, Application and Specification 7.2.3 U-Bolt-It Stud Bolts Production, Revenue, Price and Gross Margin (2014-2019) 7.2.4 Main Business and Markets Served 7.3 Dan-Loc Group 7.3.1 Dan-Loc Group Stud Bolts Production Sites and Area Served 7.3.2 Stud Bolts Product Introduction, Application and Specification 7.3.3 Dan-Loc Group Stud Bolts Production, Revenue, Price and Gross Margin (2014-2019) 7.3.4 Main Business and Markets Served 7.4 Fluid Sealing Products 7.4.1 Fluid Sealing Products Stud Bolts Production Sites and Area Served 7.4.2 Stud Bolts Product Introduction, Application and Specification 7.4.3 Fluid Sealing Products Stud Bolts Production, Revenue, Price and Gross Margin (2014-2019) 7.4.4 Main Business and Markets Served 7.5 Acument 7.5.1 Acument Stud Bolts Production Sites and Area Served 7.5.2 Stud Bolts Product Introduction, Application and Specification 7.5.3 Acument Stud Bolts Production, Revenue, Price and Gross Margin (2014-2019) 7.5.4 Main Business and Markets Served 7.6 AFI Industries 7.6.1 AFI Industries Stud Bolts Production Sites and Area Served 7.6.2 Stud Bolts Product Introduction, Application and Specification 7.6.3 AFI Industries Stud Bolts Production, Revenue, Price and Gross Margin (2014-2019) 7.6.4 Main Business and Markets Served 7.7 Arconic (Alcoa) 7.7.1 Arconic (Alcoa) Stud Bolts Production Sites and Area Served 7.7.2 Stud Bolts Product Introduction, Application and Specification 7.7.3 Arconic (Alcoa) Stud Bolts Production, Revenue, Price and Gross Margin (2014-2019) 7.4.4 Main Business and Markets Served 7.8 Ningbo XINXING FASTENERS 7.8.1 Ningbo XINXING FASTENERS Stud Bolts Production Sites and Area Served 7.8.2 Stud Bolts Product Introduction, Application and Specification 7.8.3 Ningbo XINXING FASTENERS Stud Bolts Production, Revenue, Price and Gross Margin (2014-2019) 7.8.4 Main Business and Markets Served 7.9 CISER 7.9.1 CISER Stud Bolts Production Sites and Area Served 7.9.2 Stud Bolts Product Introduction, Application and Specification 7.9.3 CISER Stud Bolts Production, Revenue, Price and Gross Margin (2014-2019) 7.9.4 Main Business and Markets Served 7.10 Cooper & Turner 7.10.1 Cooper & Turner Stud Bolts Production Sites and Area Served 7.10.2 Stud Bolts Product Introduction, Application and Specification 7.10.3 Cooper & Turner Stud Bolts Production, Revenue, Price and Gross Margin (2014-2019) 7.10.4 Main Business and Markets Served 7.11 Dokka Fasteners 7.12 Fastenal 7.13 Elesa+Ganter 7.14 Gem-Year 7.15 Infasco 7.16 KAMAX 7.17 LISI Group 7.18 Marmon 7.19 Nitto Seiko 7.20 Nucor Fastener 7.21 Oglaend System 7.22 Penn Engineering 7.23 Stanley Black & Decker 7.24 Sundram Fasteners 7.25 Shanghai Tianbao Fastener 7.26 TR Fastenings 8 Stud Bolts Manufacturing Cost Analysis 8.1 Stud Bolts Key Raw Materials Analysis 8.1.1 Key Raw Materials 8.1.2 Price Trend of Key Raw Materials 8.1.3 Key Suppliers of Raw Materials 8.2 Proportion of Manufacturing Cost Structure 8.3 Manufacturing Process Analysis of Stud Bolts 8.4 Stud Bolts Industrial Chain Analysis 9 Marketing Channel, Distributors and Customers 9.1 Marketing Channel 9.1.1 Direct Marketing 9.1.2 Indirect Marketing 9.2 Stud Bolts Distributors List 9.3 Stud Bolts Customers 10 Market Dynamics 10.1 Market Trends 10.2 Opportunities 10.3 Market Drivers 10.4 Challenges 10.5 Influence Factors 11 Global Stud Bolts Market Forecast 11.1 Global Stud Bolts Production, Revenue Forecast 11.1.1 Global Stud Bolts Production Growth Rate Forecast (2019-2025) 11.1.2 Global Stud Bolts Revenue and Growth Rate Forecast (2019-2025) 11.1.3 Global Stud Bolts Price and Trend Forecast (2019-2025) 11.2 Global Stud Bolts Production Forecast by Regions (2019-2025) 11.2.1 North America Stud Bolts Production, Revenue Forecast (2019-2025) 11.2.2 Europe Stud Bolts Production, Revenue Forecast (2019-2025) 11.2.3 China Stud Bolts Production, Revenue Forecast (2019-2025) 11.2.4 Japan Stud Bolts Production, Revenue Forecast (2019-2025) 11.3 Global Stud Bolts Consumption Forecast by Regions (2019-2025) 11.3.1 North America Stud Bolts Consumption Forecast (2019-2025) 11.3.2 Europe Stud Bolts Consumption Forecast (2019-2025) 11.3.3 China Stud Bolts Consumption Forecast (2019-2025) 11.3.4 Japan Stud Bolts Consumption Forecast (2019-2025) 11.4 Global Stud Bolts Production, Revenue and Price Forecast by Type (2019-2025) 11.5 Global Stud Bolts Consumption Forecast by Application (2019-2025) 12 Research Findings and Conclusion 13 Methodology and Data Source 13.1 Methodology/Research Approach 13.1.1 Research Programs/Design 13.1.2 Market Size Estimation 13.1.3 Market Breakdown and Data Triangulation 13.2 Data Source 13.2.1 Secondary Sources 13.2.2 Primary Sources 13.3 Author List 13.4 Disclaimer

List of Tables and Figures Figure Picture of Stud Bolts Table Global Stud Bolts Production (K MT) Growth Rate Comparison by Types (2014-2025) Figure Global Stud Bolts Production Market Share by Types in 2018 Figure Fully Threaded Product Picture Table Fully Threaded Major Manufacturers Figure Double Ends (Threaded Both Ends Only) Product Picture Table Double Ends (Threaded Both Ends Only) Major Manufacturers Figure Tap Ends (For Threaded Holes) Product Picture Table Tap Ends (For Threaded Holes) Major Manufacturers Figure Step Downs (Ends Have Different Diameters) Product Picture Table Step Downs (Ends Have Different Diameters) Major Manufacturers Table Global Stud Bolts Consumption (K MT) Comparison by Applications (2014-2025) Figure Global Stud Bolts Consumption Market Share by Applications in 2018 Figure Chemical Industry Figure Automotive Figure Machinery Figure Construction Figure MRO Figure Other Table Stud Bolts Market Size (Million US$) Comparison by Regions (2014-2025) Figure North America Stud Bolts Revenue (Million USD) and Growth Rate (2014-2025) Figure Europe Stud Bolts Revenue (Million USD) and Growth Rate (2014-2025) Figure China Stud Bolts Revenue (Million USD) and Growth Rate (2014-2025) Figure Japan Stud Bolts Revenue (Million USD) and Growth Rate (2014-2025) Figure Global Stud Bolts Revenue (Million USD) (2014-2025) Figure Global Stud Bolts Production (K MT) (2014-2025) Table Global Stud Bolts Production (K MT) of Key Manufacturers (2014-2019) Table Global Stud Bolts Production Share by Manufacturers (2014-2019) Figure Stud Bolts Production Share by Manufacturers in 2018 Table Global Stud Bolts Revenue (Million USD) by Manufacturers (2014-2019) Table Global Stud Bolts Revenue Share by Manufacturers (2014-2019) Figure Global Stud Bolts Revenue Share by Manufacturers in 2018 Table Global Market Stud Bolts Average Price (USD/MT) of Key Manufacturers (2014-2019) Figure Global Market Stud Bolts Average Price (USD/MT) of Key Manufacturers in 2018 Table Manufacturers Stud Bolts Production Sites and Area Served Table Manufacturers Stud Bolts Product Types Figure Stud Bolts Market Share of Top 5 Manufacturers Figure Stud Bolts Market Share of Top 10 Manufacturers Table Global Stud Bolts Production (K MT) by Region (2014-2019) Table Global Stud Bolts Production Market Share by Region (2014-2019) Figure Global Stud Bolts Production Market Share by Region (2014-2019) Figure Global Stud Bolts Production Market Share by Region in 2018 Table Global Stud Bolts Revenue (Million USD) by Region (2014-2019) Table Global Stud Bolts Revenue Market Share by Region (2014-2019) Figure Global Stud Bolts Revenue Market Share by Region (2014-2019) Figure Global Stud Bolts Revenue Market Share by Region in 2018 Figure Global Stud Bolts Production (K MT) Growth Rate (2014-2019) Table Global Stud Bolts Production (K MT), Revenue (Million US$), Price (USD/MT) and Gross Margin (2014-2019) Figure North America Stud Bolts Production (K MT) Growth Rate (2014-2019) Table North America Stud Bolts Production (K MT), Revenue (Million USD), Price (USD/MT) and Gross Margin (2014-2019) Figure Europe Stud Bolts Production (K MT) Growth Rate (2014-2019) Table Europe Stud Bolts Production (K MT), Revenue (Million USD), Price (USD/MT) and Gross Margin (2014-2019) Figure China Stud Bolts Production (K MT) Growth Rate (2014-2019) Table China Stud Bolts Production (K MT), Revenue (Million USD), Price (USD/MT) and Gross Margin (2014-2019) Figure Japan Stud Bolts Production (K MT) Growth Rate (2014-2019) Table Japan Stud Bolts Production (K MT), Revenue (Million USD), Price (USD/MT) and Gross Margin (2014-2019) Table Global Stud Bolts Consumption (K MT) Market by Region (2014-2019) Table Global Stud Bolts Consumption Market Share by Region (2014-2019) Figure Global Stud Bolts Consumption Market Share by Region (2014-2019) Figure Global Stud Bolts Consumption Market Share by Region in 2018 Figure North America Stud Bolts Consumption Growth Rate (2014-2019) (K MT) Figure Europe Stud Bolts Consumption Growth Rate (2014-2019) (K MT) Figure China Stud Bolts Consumption Growth Rate (2014-2019) (K MT) Figure Japan Stud Bolts Consumption Growth Rate (2014-2019) (K MT) Table Global Stud Bolts Production (K MT) by Type (2014-2019) Table Global Stud Bolts Production Share by Type (2014-2019) Figure Production Market Share of Stud Bolts by Type (2014-2019) Figure Production Market Share of Stud Bolts by Type in 2018 Table Global Stud Bolts Revenue (Million USD) by Type (2014-2019) Table Global Stud Bolts Revenue Share by Type (2014-2019) Figure Revenue Share of Stud Bolts by Type (2014-2019) Figure Revenue Market Share of Stud Bolts by Type in 2018 Table Global Stud Bolts Price (USD/MT) by Type (2014-2019) Figure Global Stud Bolts Production Growth by Type (2014-2019) (K MT) Table Global Stud Bolts Consumption (K MT) by Application (2014-2019) Table Global Stud Bolts Consumption Market Share by Application (2014-2019) Figure Global Stud Bolts Consumption Market Share by Applications (2014-2019) Figure Global Stud Bolts Consumption Market Share by Application in 2018 Table Global Stud Bolts Consumption Growth Rate by Application (2014-2019) Figure Global Stud Bolts Consumption Growth Rate by Application (2014-2019) Table Ciser Bolts and Nuts Stud Bolts Production Sites and Area Served Table Ciser Bolts and Nuts Product Introduction, Application and Specification Table Ciser Bolts and Nuts Stud Bolts Production (K MT), Revenue (Million USD), Price (USD/MT) and Gross Margin (2014-2019) Figure Ciser Bolts and Nuts Stud Bolts Production Growth Rate (2014-2019) Figure Ciser Bolts and Nuts Stud Bolts Production Market Share (2014-2019) Figure Ciser Bolts and Nuts Stud Bolts Revenue Market Share (2014-2019) Table Ciser Bolts and Nuts Main Business and Markets Served Table U-Bolt-It Stud Bolts Production Sites and Area Served Table U-Bolt-It Product Introduction, Application and Specification Table U-Bolt-It Stud Bolts Production (K MT), Revenue (Million USD), Price (USD/MT) and Gross Margin (2014-2019) Figure U-Bolt-It Stud Bolts Production Growth Rate (2014-2019) Figure U-Bolt-It Stud Bolts Production Market Share (2014-2019) Figure U-Bolt-It Stud Bolts Revenue Market Share (2014-2019) Table U-Bolt-It Main Business and Markets Served Table Dan-Loc Group Stud Bolts Production Sites and Area Served Table Dan-Loc Group Product Introduction, Application and Specification Table Dan-Loc Group Stud Bolts Production (K MT), Revenue (Million USD), Price (USD/MT) and Gross Margin (2014-2019) Figure Dan-Loc Group Stud Bolts Production Growth Rate (2014-2019) Figure Dan-Loc Group Stud Bolts Production Market Share (2014-2019) Figure Dan-Loc Group Stud Bolts Revenue Market Share (2014-2019) Table Dan-Loc Group Main Business and Markets Served Table Fluid Sealing Products Stud Bolts Production Sites and Area Served Table Fluid Sealing Products Product Introduction, Application and Specification Table Fluid Sealing Products Stud Bolts Production (K MT), Revenue (Million USD), Price (USD/MT) and Gross Margin (2014-2019) Figure Fluid Sealing Products Stud Bolts Production Growth Rate (2014-2019) Figure Fluid Sealing Products Stud Bolts Production Market Share (2014-2019) Figure Fluid Sealing Products Stud Bolts Revenue Market Share (2014-2019) Table Fluid Sealing Products Main Business and Markets Served Table Acument Stud Bolts Production Sites and Area Served Table Acument Product Introduction, Application and Specification Table Acument Stud Bolts Production (K MT), Revenue (Million USD), Price (USD/MT) and Gross Margin (2014-2019) Figure Acument Stud Bolts Production Growth Rate (2014-2019) Figure Acument Stud Bolts Production Market Share (2014-2019) Figure Acument Stud Bolts Revenue Market Share (2014-2019) Table Acument Main Business and Markets Served Table AFI Industries Stud Bolts Production Sites and Area Served Table AFI Industries Product Introduction, Application and Specification Table AFI Industries Stud Bolts Production (K MT), Revenue (Million USD), Price (USD/MT) and Gross Margin (2014-2019) Figure AFI Industries Stud Bolts Production Growth Rate (2014-2019) Figure AFI Industries Stud Bolts Production Market Share (2014-2019) Figure AFI Industries Stud Bolts Revenue Market Share (2014-2019) Table AFI Industries Main Business and Markets Served Table Arconic (Alcoa) Stud Bolts Production Sites and Area Served Table Arconic (Alcoa) Product Introduction, Application and Specification Table Arconic (Alcoa) Stud Bolts Production (K MT), Revenue (Million USD), Price (USD/MT) and Gross Margin (2014-2019) Figure Arconic (Alcoa) Stud Bolts Production Growth Rate (2014-2019) Figure Arconic (Alcoa) Stud Bolts Production Market Share (2014-2019) Figure Arconic (Alcoa) Stud Bolts Revenue Market Share (2014-2019) Table Arconic (Alcoa) Main Business and Markets Served Table Ningbo XINXING FASTENERS Stud Bolts Production Sites and Area Served Table Ningbo XINXING FASTENERS Product Introduction, Application and Specification Table Ningbo XINXING FASTENERS Stud Bolts Production (K MT), Revenue (Million USD), Price (USD/MT) and Gross Margin (2014-2019) Figure Ningbo XINXING FASTENERS Stud Bolts Production Growth Rate (2014-2019) Figure Ningbo XINXING FASTENERS Stud Bolts Production Market Share (2014-2019) Figure Ningbo XINXING FASTENERS Stud Bolts Revenue Market Share (2014-2019) Table Ningbo XINXING FASTENERS Main Business and Markets Served Table CISER Stud Bolts Production Sites and Area Served Table CISER Product Introduction, Application and Specification Table CISER Stud Bolts Production (K MT), Revenue (Million USD), Price (USD/MT) and Gross Margin (2014-2019) Figure CISER Stud Bolts Production Growth Rate (2014-2019) Figure CISER Stud Bolts Production Market Share (2014-2019) Figure CISER Stud Bolts Revenue Market Share (2014-2019) Table CISER Main Business and Markets Served Table Cooper & Turner Stud Bolts Production Sites and Area Served Table Cooper & Turner Product Introduction, Application and Specification Table Cooper & Turner Stud Bolts Production (K MT), Revenue (Million USD), Price (USD/MT) and Gross Margin (2014-2019) Figure Cooper & Turner Stud Bolts Production Growth Rate (2014-2019) Figure Cooper & Turner Stud Bolts Production Market Share (2014-2019) Figure Cooper & Turner Stud Bolts Revenue Market Share (2014-2019) Table Cooper & Turner Main Business and Markets Served Table Production Base and Market Concentration Rate of Raw Material Figure Price Trend of Key Raw Materials Table Key Suppliers of Raw Materials Figure Manufacturing Cost Structure of Stud Bolts Figure Manufacturing Process Analysis of Stud Bolts Figure Stud Bolts Industrial Chain Analysis Table Stud Bolts Distributors List Table Stud Bolts Customers List Table Market Key Trends Table Key Opportunities Table Market Key Drivers Table Key Challenges Table Key Influence Factors Figure Global Stud Bolts Production (K MT) and Growth Rate Forecast (2019-2025) Figure Global Stud Bolts Revenue (Million USD) and Growth Rate Forecast (2019-2025) Figure Global Stud Bolts Price and Trend Forecast (2019-2025) Table Global Stud Bolts Production (K MT) Forecast by Region (2019-2025) Figure Global Stud Bolts Production Market Share Forecast by Region (2019-2025) Figure North America Stud Bolts Production (K MT) and Growth Rate Forecast (2019-2025) Figure North America Stud Bolts Revenue (Million USD) and Growth Rate Forecast (2019-2025) Figure Europe Stud Bolts Production (K MT) and Growth Rate Forecast (2019-2025) Figure Europe Stud Bolts Revenue (Million USD) and Growth Rate Forecast (2019-2025) Figure China Stud Bolts Production (K MT) and Growth Rate Forecast (2019-2025) Figure China Stud Bolts Revenue (Million USD) and Growth Rate Forecast (2019-2025) Figure Japan Stud Bolts Production (K MT) and Growth Rate Forecast (2019-2025) Figure Japan Stud Bolts Revenue (Million USD) and Growth Rate Forecast (2019-2025) Table Global Stud Bolts Consumption (K MT) Forecast by Regions (2019-2025) Figure Global Stud Bolts Consumption Market Share Forecast by Regions (2019-2025) Figure North America Stud Bolts Consumption (K MT) Growth Rate Forecast (2019-2025) Figure Europe Stud Bolts Consumption (K MT) Growth Rate Forecast (2019-2025) Figure China Stud Bolts Consumption (K MT) Growth Rate Forecast (2019-2025) Figure Japan Stud Bolts Consumption (K MT) Growth Rate Forecast (2019-2025) Table Global Stud Bolts Production (K MT) Forecast by Type (2019-2025) Figure Global Stud Bolts Production (K MT) Forecast by Type (2019-2025) Table Global Stud Bolts Revenue (Million USD) Forecast by Type (2019-2025) Figure Global Stud Bolts Revenue Market Share Forecast by Type (2019-2025) Table Global Stud Bolts Price (USD/MT) Forecast by Type (2019-2025) Table Global Stud Bolts Consumption (K MT) Forecast by Application (2019-2025) Figure Global Stud Bolts Consumption Forecast by Application (2019-2025) Table Research Programs/Design for This Report Figure Bottom-up and Top-down Approaches for This Report Figure Data Triangulation Table Key Data Information from Secondary Sources Table Key Data Information from Primary Sources

Ciser Bolts and Nuts U-Bolt-It Dan-Loc Group Fluid Sealing Products Acument AFI Industries Arconic (Alcoa) Ningbo XINXING FASTENERS CISER Cooper & Turner Dokka Fasteners Fastenal Elesa+Ganter Gem-Year Infasco KAMAX LISI Group Marmon Nitto Seiko Nucor Fastener Oglaend System Penn Engineering Stanley Black & Decker Sundram Fasteners Shanghai Tianbao Fastener TR Fastenings