Locking Inserts Technologies Co., Ltd. is a Shenzhen-based manufacturer specializing in thread inserts and comprehensive thread repair solutions, founded in 2009. Our business began with the produce and sales of wire thread inserts (Helicoil), establishing a strong reputation for reliable performance, high quality, and durable solutions.
In 2011, responding to market demand, we expanded into Key Locking Inserts (Keenserts), and began producing standard stock items that comply with international standards such as ISO Metric, UNC, UNF and MS series. Building on our extensive experience and rigorous ISO9001:2015 quality management, we now offer custom manufacturing capabilities, delivering products precisely according to customer specifications and engineering drawings.
Backed by a skilled team of engineers, Locking Inserts Technologies provides a full range of solutions, from standard stock inserts to high-precision custom components, including self-tapping inserts, wire thread inserts, Key Locking Inserts, and specialized thread repair tools. Our mission is to consistently provide global customers with high-quality, reliable thread repair solutions that meet international standards, while continuously enhancing product performance and engineering excellence. We are fully dedicated to specializing exclusively in thread inserts.
Our Factory
Founded in 2009 and headquartered in Shenzhen, China, Locking Inserts Technologies Co., Ltd. is a specialist manufacturer focused exclusively on thread inserts and professional thread repair solutions. With over a decade of experience, we have earned a strong reputation among global industries for precision, reliability, and durability.
Our factory covers approximately 1,500m² and is equipped with 20 production machines, including CNC wire forming machines, high-precision tapping machines, lathes, dedicated key punching machines for Key Locking Inserts (Keenserts), and automated quality inspection systems. The factory produces over 1 million inserts per month, covering wire thread inserts, self-tapping inserts, and Key Locking Inserts.
We follow a strict ISO9001:2015 quality management system, and each batch of products meets high performance and dimensional standards, with an internal defect rate consistently below 0.1%. Our facility also supports custom manufacturing, producing according to precise customer drawings and specifications. The factory is backed by a team of 14 experienced engineers and technicians, ensuring comprehensive solutions from standard stock inserts to high-precision custom components and specialized thread repair tools.
Key Facts
Founded: 2009, Shenzhen, China
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Factory Area: ~1,500 m²
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Production Capacity: Over 1,000,000 inserts per month
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Equipment: 20 production and inspection machines
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Quality Standard: ISO9001:2015
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Internal Defect Rate: <0.1%
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Engineering Team: 14 professionals
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Product Application
Wire Thread Inserts (Helicoil)
Application Scope
- Reinforce threads in low-strength metals
- Repair worn, stripped, or damaged threads
- Withstand high vibration and high-stress conditions
- Extend thread durability and wear resistance
Typical Use Cases
- Aerospace components, engine blocks
- Automotive engines, gearboxes, chassis parts
- Electrical equipment and machine housings
- Molds and fixtures with frequent assembly/disassembly
Key Locking Inserts (Keenserts)
Application Scope
- High-strength threaded connections capable of handling high torque
- Prevent thread stripping, loosening, or breakage
- Distribute load and improve joint durability
- Reinforce or repair threads in metal
Typical Use Cases
- Aerospace engine components
- High-stress automotive parts (suspension systems, cylinder heads)
- Heavy machinery and construction equipment
- Precision machinery and molds requiring reliable connections
Self-Tapping Inserts
Application Scope
- Cut threads directly in metal, plastic, or composite materials
- Improve installation efficiency
- Enable fast on-site thread installation or repair
Typical Use Cases
- Lightweight structural components (electronic housings, instruments)
- Machinery panels or parts for on-site installation
- Maintenance and modification scenarios for quick replacement or thread reinforcement
Thread Repair Tools
Application Scope
- Used with inserts to repair, reinforce, and install threads
- Restore damaged threads to original strength
- Thread machining and maintenance for various materials
Typical Use Cases
- Aerospace, automotive, and marine repair workshops
- Factory production line thread repair
- Maintenance of machinery and instruments
- On-site thread repair for molds and fixtures
Our Certificate
ISO9001:2015, SGS Product Test Report, Material Test Report, RoHS, CE Certification
AS9100 Aerospace Quality Management
CE Certification
ISO 9001 2015 certification
SGS Report
Raw Material Certificate
IATF 16949 2016 Automotive Quality Management System
Production Market
Market Coverage & Sales Performance
Our threaded inserts are supplied to customers in both domestic and international markets, serving industries such as automotive, machinery manufacturing, electronics, and industrial equipment.
International Markets
We export our products to major industrial regions including North America, Europe, and Asia-Pacific, with stable customers in the United States, Germany, the UK, Japan, South Korea, and Southeast Asia. Our products comply with ISO and ANSI standards and are widely accepted by OEMs and distributors. Export sales have maintained steady year-on-year growth, with a high repeat purchase rate from long-term partners.
Domestic Market
In China, we supply threaded inserts to automotive, electronics, industrial machinery, and equipment manufacturers, as well as professional fastener distributors. With reliable quality and consistent delivery, we have established long-term cooperation with numerous domestic OEM customers and maintain stable annual growth in the local market.
Sales & Service Support
Pre-Sales Service
We provide professional technical consultation before order placement, including product selection, size recommendation, material advice, and application evaluation. Samples and technical drawings are available upon request to ensure accurate product matching.
In-Sales Service
During order processing, we ensure clear order confirmation, strict production control, and timely progress updates. Packaging, labeling, and documentation can be customized to meet customer and shipping requirements.
We maintain regular inventory for standard thread insert sizes, enabling fast delivery and immediate shipment without lead time. This helps customers shorten procurement cycles and respond quickly to project or production needs.
After-Sales Service
We provide reliable after-sales support, including installation guidance, technical assistance, and quality feedback handling. In case of any quality issues confirmed by both parties, appropriate solutions such as replacement or compensation will be provided promptly.
Logistics & Support
We support multiple international trade terms (EXW, FOB, CIF, DAP) and assist customers with export documentation and logistics coordination to ensure smooth and efficient delivery.