Where to Buy Threaded Inserts in Bulk？
Leading Rivet Nut Manufacturer and Supplier in China
If you’re looking to strengthen threads in metal, plastic, or wood components, threaded inserts are an essential fastening solution. Whether you’re a manufacturer, distributor, or repair specialist, knowing where to buy threaded inserts in bulk can significantly impact your costs, lead times, and product quality. In this guide, we’ll explore the best sources—from specialized manufacturers to global B2B platforms and local distributors—so you can find the right supplier for your volume needs.
Table of Contents
Threaded inserts are fasteners used to create strong, wear-resistant internal threads in a variety of base materials such as metal, plastic, and wood. They are widely used in industrial manufacturing, structural reinforcement, and 3D printing. Based on their structure, installation method, and application environment, threaded inserts are commonly classified into the following types:
- Structure: Made of high-strength stainless steel wire, coiled into a helical shape that forms standard internal threads when installed.
- Installation: Requires a pre-tapped hole. Inserted using a specialized installation tool, and the tang is broken off after insertion.
- Base Materials: Aluminum, magnesium, plastic, steel, and other alloys.
- Advantages:
- Greatly improves thread strength and wear resistance;
- Used to repair stripped or damaged threads;
- Allows repeated screw installation without damaging the base material;
- Self-locking variants offer anti-vibration performance.
- Applications: Aerospace, automotive engines, mold tooling, electronic enclosures, precision instruments, military equipment.
b. Press-In Inserts
- Structure: Features external knurling or ribs to provide grip once pressed into the base material.
- Installation: Installed by applying pressure, often using a press machine.
- Base Materials: Thermoplastics, soft aluminum sheets, and other soft materials.
- Applications: Consumer electronics (laptops, smartphones), small appliances, plastic housings.
c. Heat-Set Inserts
- Structure: Typically made from brass or copper alloy, with external flutes or knurling to enhance retention.
- Installation: Heated and pressed into thermoplastics using a soldering iron or heated tip; fixed in place once the plastic cools.
- Base Materials: Thermoplastics like ABS, PLA, PETG, etc.
- Applications: 3D-printed parts, electronic connectors, plastic enclosures.
d. Self-Tapping Inserts
- Structure: Equipped with external cutting threads that cut into the material as they are installed, eliminating the need for pre-tapping.
- Installation: Screwed directly into the base material using a screwdriver or power tool.
- Base Materials: Aluminum, plastic, composites, etc.
- Applications: Field repairs, reinforcement in non-threaded holes, low-volume assembly.
e. Ultrasonic Inserts
- Structure: Similar to heat-set inserts but designed for ultrasonic welding.
- Installation: Installed using ultrasonic vibration and pressure, which melts the surrounding plastic and embeds the insert.
- Base Materials: Engineering plastics such as ABS, PC, PA.
- Applications: Medical equipment housings, automotive interior components, high-precision plastic assemblies.
- Structure: A tubular body with internal threading that deforms outward to fasten to the material.
- Installation: Inserted from one side using a rivet nut tool or pneumatic riveter—ideal for blind hole applications.
- Base Materials: Thin metal sheets, stainless steel, plastic panels.
- Advantages:
- Enables installation in enclosed or hard-to-reach areas;
- No need for pre-tapped threads;
- Provides strong internal threads on thin materials.
- Applications: Sheet metal fabrication, structural frames, vehicle bodies, elevators, railway equipment.
Summary: How to Choose the Right Type?
| Type | Suitable Base Material | Installation Method | Common Applications |
| Wire Thread Inserts | Metal, Plastic | Pre-tapped + Tool Insertion | High-strength, wear-resistant uses |
| Press-In Inserts | Plastic, Thin Metal | Press Fit | Electronics, appliances |
| Heat-Set Inserts | Thermoplastics | Heat Embedding | 3D-printed parts, enclosures |
| Self-Tapping Inserts | Aluminum, Plastic | Direct Screw-In | Repairs, non-threaded assemblies |
| Ultrasonic Inserts | Engineering Plastics | Ultrasonic Welding | Medical/automotive plastic parts |
| Rivet Nuts | Thin Metal, Plastics | Blind-Side Riveting | Sheet metal, transportation industry |
Why Should You Buy Threaded Inserts in Bulk?
Threaded inserts—also known as thread repair inserts or screw thread inserts—are designed to create high-strength, reusable internal threads in base materials. They are commonly used in:
- Metal structures – such as aluminum or magnesium, to reinforce weak threads
- Plastic components – to prevent thread wear or cracking due to repeated fastening
- Wood applications – to provide secure, long-lasting fastening points and prevent loosening
Why Buy Threaded Inserts in Bulk?
For factories, OEMs, and high-volume assembly lines, buying threaded inserts in bulk offers several key benefits:
1. Lower Unit Cost (Wholesale Pricing)
- Bulk purchases typically come with more competitive pricing than small-lot orders
- Long-term cooperation can lock in discounted rates, helping to reduce procurement budgets
- Per-unit costs related to packaging, shipping, and customs are significantly reduced
2. Stable Supply to Avoid Production Delays
- Bulk orders help establish a stable stock, preventing production interruptions due to sudden shortages
- Consistent inventory ensures the assembly line runs smoothly
- Especially important for time-sensitive OEM projects and mass production schedules
3. Easier Standardization and Quality Control
- Purchasing in bulk allows consistent use of the same specifications (thread size, material type)
- Packaging can be customized to your needs (labeling, cartons, pallets, etc.)
- Reduces the risk of assembly errors or mix-ups caused by batch variations
What Are the Key Factors When Choosing a Supplier?
When selecting a supplier for threaded inserts, buyers should carefully evaluate the following aspects to ensure supply chain stability and product quality:
Support for Bulk Orders and OEM Customization
The supplier’s ability to handle large-volume production and offer customization services such as private labeling is crucial for establishing a long-term partnership.
Production Capacity and Lead Time
Whether the supplier has adequate manufacturing equipment and capacity to meet industrial-grade or high-frequency supply demands, and if their delivery times are stable and aligned with the buyer’s production schedules.
Complete Range of Product Specifications and Models
The supplier should provide a comprehensive range of specifications, including various thread sizes, metric and imperial standards, and a variety of material options to suit diverse application requirements.
Certification Systems
Verification of quality management certifications such as ISO 9001, as well as environmental and compliance certifications like RoHS and REACH, to ensure product quality and regulatory compliance.
Packaging and Logistics Capabilities
Whether the supplier supports customized packaging and has the capacity for global shipping to ensure products arrive safely and promptly.
Technical Support and After-Sales Service
Availability of technical guidance for installation and product selection, as well as responsive after-sales support to address any issues encountered during use.
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Where to Buy Threaded Inserts in Bulk?
When sourcing threaded inserts in bulk, choosing the right supply channel is critical—it impacts not only pricing and product quality but also delivery efficiency and after-sales support. Below are the three main types of procurement channels, each suitable for different business needs. Buyers should evaluate based on their order volume, lead time, customization needs, and budget.
If your priority is consistent product quality, strong customization capability, and a long-term supply partnership, working directly with professional threaded inserts manufacturers is the most reliable option.
Recommended Manufacturers:
- Rivetfix (China) – Offers a full range of products including wire thread inserts, self-locking inserts, and tangless inserts. Supports OEM/ODM customization and has strong export capabilities.
- Böllhoff (Germany) – A global leader in threaded fastening technology and the original developer of Helicoil® products. Ideal for high-end industrial applications.
- PennEngineering (USA) – Owns several brands including Heli-Coil, providing extensive solutions for aerospace, electronics, and precision engineering industries.
- HONSEL (Germany) – Focuses on high-quality inserts and rivet fastening systems, with integrated support for automated installation solutions.
Advantages:
- Full product range and drawing-based customization
- Strict quality control with ISO and global certifications
- Reliable long-term supply with technical assistance
- Best for large-volume industrial users with strict quality and delivery requirements
2. Industrial Fastener Platforms and B2B Marketplaces
If you need to compare multiple suppliers quickly or order small-to-medium quantities, global B2B marketplaces are a great option for flexibility and accessibility.
Recommended Platforms:
- Alibaba – One of the world’s largest B2B trading platforms, connecting buyers with manufacturers mainly in China, India, and Southeast Asia.
- Made-in-China – A Chinese supplier-focused platform for global buyers, ideal for finding OEM-capable factories.
- Thomasnet – Specializes in North American industrial sourcing, listing a wide range of domestic fastener suppliers.
- Fastenal / RS Components – Offer online ordering, local warehousing, and technical support in multiple countries.
Advantages:
- Easy comparison across multiple suppliers
- Supports small orders and sampling
- Supplier reviews and ratings help reduce sourcing risk
- Great for SMEs, repair shops, or trading companies
3. Local Hardware Wholesalers / Authorized Distributors
If you require fast delivery, localized service, or face-to-face technical support, working with local distributors or authorized agents may be the most efficient option.
Best For:
- Urgent orders or frequent replenishment needs
- Projects that require invoices, compliance documents, or import/export assistance
- Buyers with brand-specific needs (e.g., certified Böllhoff or Rivetfix distributors)
- Applications requiring product advice, onsite support, or samples
Suggestions:
- Check the brand’s official website for a list of authorized distributors
- Contact local industrial supply associations for referrals
- Combine online research with local sourcing to validate specifications and build a stable relationship
Pro Tip: How to Evaluate Supplier Reliability
- Check for a professional website and certifications (e.g., ISO, RoHS)
- Ask about samples, contract terms, and payment options
- Look for export experience, customer testimonials, or ratings on third-party platforms
- Inquire about private label services, custom packaging, and volume discounts
Why Is China a Leading Source for Threaded Inserts in Bulk?
In recent years, China has become one of the world’s primary production and export hubs for threaded inserts. Particularly in the industrial fastener sector, Chinese manufacturers offer significant advantages in terms of cost, variety, and supply capability. For global buyers, sourcing in bulk from China not only helps reduce procurement costs but also ensures flexibility, reliability, and customized service.
1. Competitive Pricing and Excellent Cost-Performance
- China has a complete industrial supply chain and well-developed manufacturing systems, enabling strict control over production costs.
- Products with the same specifications are generally more competitively priced compared to those from Europe, the U.S., or Japan.
- Ideal for companies with cost-sensitive procurement strategies or high-volume needs.
2. Wide Range of Product Types to Meet Diverse Needs
- Chinese suppliers can manufacture a full range of threaded inserts including Wire Thread Inserts, Press-In Inserts, Heat-Set Inserts, Self-Tapping Inserts, and Rivet Nuts.
- They support metric/inch standards, standard or custom designs, tanged or tangless variations.
- Suitable for installation in metals, plastics, wood, and composites, covering applications from general industry to high-end precision manufacturing.
3. Extensive Export Experience and Strong Global Service Capabilities
- Most manufacturers have years of experience in international trade and are familiar with certifications, packaging, customs clearance, and logistics processes in different regions.
- Many offer multilingual service, fast quote response, and flexible support for small trial orders.
- They are well-versed in global cooperation models, including B2B platforms like Alibaba and Thomasnet, and actively participate in international trade shows.
Recommended Manufacturers from China
Rivetfix
As one of China’s leading manufacturers of threaded inserts and fastening systems, Rivetfix specializes in OEM/ODM customization. Their product range includes wire thread inserts, rivet nuts, rivet nut tools, and more. With strong export capacity, fast delivery, and stable quality, Rivetfix supports drawing-based production and private labeling, serving clients across Europe, Southeast Asia, and North America.
Rivmate
Focused on high-strength threaded fastening solutions, Rivmate excels in handling medium to large-scale orders. The company provides product optimization recommendations and integrated packaging services, and is known for reliability and professionalism among clients in Europe and the U.S.
FAQs - Buy Threaded Inserts in Bulk
1. What is the Minimum Order Quantity (MOQ)?
- Different manufacturers have varying MOQ requirements, commonly ranging from 1,000 to 5,000 pieces;
- For first-time buyers or sampling, some suppliers support small trial orders as low as 200 to 500 pieces;
- It is recommended to clearly specify your quantity needs during the inquiry stage to receive accurate pricing and lead times.
2. How Do I Confirm Thread Specifications and Material?
- You can provide drawings (2D/3D), samples, or technical parameters, and manufacturers will assist in confirming and recommending suitable models;
- Common thread standards include ISO, UNC, UNF, BSW, M-series, etc. It is best to specify thread form, pitch, and tolerance class;
- Material options typically include stainless steel, carbon steel (zinc-plated), brass, and titanium alloy, to be selected based on the application environment.
3. Are Samples Available?
- Most manufacturers offer free or paid samples (shipping costs are usually borne by the buyer);
- Samples help verify dimensions, tolerances, thread accuracy, and installation compatibility;
- Sample lead time is usually 3 to 7 days, and international express shipping (DHL, FedEx, etc.) is supported.
4. What is the Typical Lead Time?
- Standard stock items usually ship within 7 to 15 working days;
- Custom products (special thread types, tangless inserts, special packaging) may require 20 to 30 working days;
- For bulk orders, it is advisable to plan production in advance and allow for longer lead times during peak seasons (e.g., Q2 and Q4).
5. Can Packaging or Branding be Customized?
- Yes, most manufacturers support OEM/ODM services, including:
- Custom logos, laser marking, packaging labels, and carton designs;
- Use of English instructions, neutral packaging, or exclusive brand styles per customer requirements;
- MOQ for free customized packaging is generally above 5,000 pieces, subject to manufacturer policy.
Conclusion
When purchasing threaded inserts, it is important to choose the right supplier based on your specific application, budget, and delivery timeline requirements. It is recommended to first conduct small-batch sample testing to verify product performance and suitability, ensuring that the inserts meet your design and process standards before proceeding with large-scale bulk orders. Additionally, partnering with manufacturers that offer strong engineering support will help ensure product quality, stable delivery, and reliable after-sales service, ultimately providing greater value and competitive advantage for your business.
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Buy Threaded Inserts from Rivetfix
As a leading fastener manufacturer in China with more than 15 years in the industry, Rivetfix are committed to providing first-class quality fasteners and responsive services to the world.
We supply a wide range of threaded inserts designed to meet the unique demands of your projects. Rivetfix ensures you have the right solution for every application. Choose Rivetfix for versatile, cost-effective, and durable fastening solutions tailored to your specific needs. In addition, we can also provide customized service according to your requirements.
Looking for a reliable way to strengthen your threaded connections or repair damaged threads? Wire thread inserts are the perfect solution. Whether you’re working in aerospace, automotive, electronics, or general manufacturing, these inserts offer exceptional durability, anti-vibration performance, and long-term reliability. Don’t compromise on thread strength—upgrade your fastening systems today with high-quality wire thread inserts.
Contact us now to find the ideal solution for your project!
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