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Flange Bolt

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Flange Bolt

Flange Bolt

Product Introduction

A flange bolt is a bolt with an integrated flange structure. The flange can replace traditional washers, increasing the contact area between the bolt head and the connected parts, making the force distribution more uniform and improving connection stability.

WT Fasteners specializes in producing various specifications of flange bolts, including hex flange bolts, serrated flange bolts, high-strength flange bolts, and custom non-standard flange bolts. We can provide different materials, strength grades, and surface treatment options according to customer requirements.

Flange bolts are widely used in automotive manufacturing, machinery and equipment, steel structures, power equipment, engineering machinery, and industrial assembly.


Product Features

1. Integrated Flange Design

The bolt head features a flange that increases the bearing area, reduces surface pressure on connected parts, and enhances fastening effectiveness.

2. Excellent Anti-Loosening Performance

The serrated flange structure increases friction, improving vibration resistance and making it suitable for vibrating environments.

3. High Installation Efficiency

No need for separate washers, reducing the number of parts and improving assembly efficiency.

4. High-Strength Manufacturing

Made from high-quality carbon steel, alloy steel, and stainless steel, offering good tensile strength and fatigue resistance.

5. Custom Non-Standard Options

Custom sizes, head structures, thread specifications, and surface treatments can be provided based on customer drawings or samples.


Product Parameters

Product Name:
Flange Bolt

English Name:
Flange Bolt / Flanged Hex Bolt

Common Standards:

  • DIN 6921
  • ISO 4162
  • GB/T 5789

Materials:

  • Carbon Steel
  • Alloy Steel
  • Stainless Steel 304
  • Stainless Steel 316

Strength Grades:

  • Grade 8.8
  • Grade 10.9
  • Grade 12.9

Size Range:

M5-M24
(Custom non-standard sizes available)

Length:

10mm-200mm

Thread Types:

  • Metric Coarse
  • Metric Fine
  • Imperial Thread

Head Types:

  • Hex Flange Head
  • Serrated Flange Head

Surface Treatments:

  • White Zinc
  • Yellow Zinc
  • Black Zinc
  • Hot-Dip Galvanizing
  • Dacromet
  • Black Oxide
  • Stainless Steel Natural Finish

Product Types

Hex Flange Bolt

The most common type, suitable for machinery and industrial assembly.

Serrated Flange Bolt

Features serrations on the flange underside to increase friction and provide better anti-loosening performance.

High-Strength Flange Bolt

Manufactured from high-grade materials, suitable for high-load connections.

Stainless Steel Flange Bolt

Excellent corrosion resistance, suitable for outdoor and special environments.

Custom Flange Bolt

Customized special specifications according to customer requirements.


Application Areas

Flange bolts are widely used in:

  • Automotive manufacturing
  • Motorcycle components
  • Engineering machinery
  • Machinery and equipment
  • Steel structure engineering
  • Power equipment
  • Solar panel brackets
  • Industrial production lines
  • Assembly manufacturing

Packaging Methods

According to customer requirements, we provide:

  • Plastic bag packaging
  • Small box packaging
  • Carton packaging
  • Woven bag packaging
  • Pallet packaging
  • Customer brand packaging

Product facts

Procurement & delivery information

MOQ

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MOQ from 1 kg for standard sizes. Trial orders are welcome. Custom non-standard parts are confirmed based on drawings and the production process; small-batch samples can be arranged.

Stock

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Large stock. Bolts, nuts, washers, expansion anchors, threaded rods and other common specifications are well stocked for ready shipment or fast replenishment.

Lead time

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Large stock of common specifications — ready for fast dispatch after order confirmation. Standard products usually take 15–30 days when production is needed. Custom non-standard orders have short lead times, confirmed after drawing review.

Materials

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A variety of carbon steel, stainless steel, and alloy steel materials are available, including: Q195, Q235, 35#, 45#, 35CrMo, 42CrMo, C1022, 304, 316, etc. Other specified materials can be produced according to customer drawings, standards, or technical requirements.

Grades

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Fasteners of different strength grades are available, including: 4.8, 5.8, 6.8, 8.8, 10.9, 12.9, etc. Nuts can be provided in grades 4, 6, 8, 10, 12, etc., depending on product standards and customer requirements.

Standards

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Production can be carried out according to international and national standards, including: DIN, ISO, GB, ANSI/ASME, ASTM, BS, JIS, etc. We also support customization of non-standard fasteners based on customer drawings, samples, or technical parameters.

Surface finishes

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A variety of surface treatments are available, including: clear zinc, yellow zinc, black zinc, black oxide, hot-dip galvanizing, Dacromet, nickel plating, chrome plating, phosphating, mechanical galvanizing, etc. Salt spray time, coating thickness, and anti-corrosion requirements can be confirmed according to customer requirements.

Production equipment

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Equipped with cold heading, thread rolling, die pressing, machining, heat treatment, and surface treatment supporting equipment. We can complete the entire production process from raw materials, forming, thread processing, heat treatment to packaging and shipping, and arrange the corresponding production process according to product type.

Inspection, certificates & reports

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Products can be inspected for dimensions, threads, hardness, tensile strength, torque, coating thickness, and salt spray before production and shipment. According to order requirements, we can provide: material certificates, dimensional inspection reports, hardness test reports, tensile test reports, salt spray test reports, coating inspection reports, and third-party inspection reports. Relevant certificates and inspection items are provided according to product standards and customer requirements.

Packaging

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A variety of export packaging methods are supported, including: small boxes + outer cartons, woven bags, cartons, wooden cases, pallets, bulk packaging, and custom packaging. We can provide customer brand packaging: logo, color boxes, labels, barcodes, shipping marks, and OEM packaging. Packaging methods will be adjusted according to product weight, size, and transportation mode to reduce damage and spillage during transit.

Loading & export capability

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We have long-term experience serving overseas customers and are familiar with sea freight, air freight, and international logistics export processes. We can formulate container loading plans based on product size, weight, and container type, supporting: 20GP, 40GP, 40HQ full container export, as well as LCL consolidation. Before shipment, we can provide product photos, packaging photos, pallet photos, and container loading photos, and assist in preparing commercial invoices, packing lists, certificates of origin, and other export documents.

Projects & customer cases

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Products have been exported to markets in Asia, the Middle East, Africa, Europe, South America, and other regions, serving customers including: fastener importers, hardware wholesalers, building material distributors, engineering contractors, machinery manufacturing enterprises, and industrial equipment customers. We can provide standard fasteners, engineering fasteners, and non-standard customized product solutions according to different market requirements.

Products

Factory-direct supply with large stock on common sizes

Hebei Wangtu focuses on industrial fastener supply. We keep large stock, start standard orders from 1 kg, and run short lead times for custom parts. Send your size list or drawing for a fast RFQ.

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Bolts
01

Bolts

For importers, wholesalers and project buyers sourcing standard or drawing-based bolts. Browse flange, socket, anchor, U-bolt and other bolt types. For a bulk RFQ, send the standard or drawing, size and thread, material or grade, finish, quantity, packing, destination and required inspection documents.

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Anchors Expansion Bolts Sleeve Anchors Wedge Anchors Chemical Anchors
02

Anchors / Expansion Series

For importers, distributors and project buyers sourcing anchors for concrete, masonry and installation work. Browse sleeve, wedge, drop-in, heavy-duty and chemical-anchor components. For a bulk RFQ, provide the base material, application, anchor type and size, material or finish, quantity, packing, destination and any drawing or document requirement.

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Custom special-shaped fasteners, non-standard bolts, nuts, and metal connectors
03

custom-fasteners

Custom non-standard fasteners and special-shaped metal parts can be manufactured according to customer drawings, samples, and technical requirements. We offer customization of bolts, nuts, screws, pins, stampings, and special connectors. Various materials, strength grades, surface treatments, dimensions, and packaging requirements are supported, suitable for machinery, automotive, construction, energy, and industrial projects.

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Hex nuts of different strength grades and industrial nut product display
04

Nuts

For importers, wholesalers and project buyers sourcing standard or drawing-based nuts and locking components. Browse hex, lock, flange, cap, coupling and other nut types. For a bulk RFQ, send the mating bolt or thread, standard or drawing, material or grade, finish, quantity, packing, destination and required inspection documents.

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Testing Equipment

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Featured Products

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U Bolt
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Certifications

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Testing, Certificates, and Reports 3
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Testing, Certificates and Reports

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Experience Advantage

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Production Workshop

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Warehouse

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Product Advantages

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Partner Companies

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Customer Reviews

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News

Latest Updates

All News →
2025-01-15-cost-trade

Challenges and Opportunities: Cost, Trade, and Transformation – How Fastener Manufacturers Can Tackle Rising Raw Material Prices, Trade Barriers, and the Urgent Need for Business Model Transformation

The global fastener industry is at a critical crossroads. Despite growing demand from sectors like new energy vehicles and aerospace, manufacturers face unprecedented headwinds. However, significant opportunities await those who can navigate these challenges.

View Details →
construction-fastener-demand-2026

Infrastructure Projects and Steel Structure Expansion Drive Global Bolt Demand

Global demand for construction fasteners continues to grow in 2026. Infrastructure expansion, steel structure projects, and industrial development are driving strong demand for high-strength bolts and fastening systems.

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Global Fastener Market Trends in Q3 2026: Steel Prices, Construction Demand, and Export Opportunities

Global Fastener Market Trends in Q3 2026: Steel Prices, Construction Demand, and Export Opportunities

In Q3 2026, the global fastener industry continues to grow steadily. Demand for high-strength bolts, structural fasteners, and galvanized construction bolts has increased in infrastructure, steel structures, and industrial projects.

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Quick inquiry

Bulk RFQ / Send Drawing

Large stock on common sizes. MOQ from 1 kg. Short custom lead times. Include product/standard, size, material/grade, finish, quantity, packing and destination — or upload a drawing — and we will reply with quote and lead time.

Flange Bolt