Anti-Tamper Disposable High Security Container Bolt Seal for truck container door lock 

Our bolt seal is broadly applied in multiple logistics environments, with its primary use being the secure locking of ISO-compliant shipping containers. As a key tool in cargo security, it is designed to meet international standards and provide reliable protection throughout the transportation process.

It is equally effective for securing truck doors, van trucks, tankers, trailers, railway wagons, and freight cars, ensuring goods remain protected from unauthorized access during long-distance transit. This makes it highly suitable for high-value shipments, including electronics, pharmaceuticals, chemicals, and luxury goods.

Additionally, it is widely adopted in customs-bonded cargo operations and C-TPAT compliant logistics systems, supporting stricter security control and compliance requirements. Whether by sea, land, or air, our bolt seal consistently delivers strong, tamper-evident protection for your cargo.

High security structure – Constructed from durable high-tensile steel, the seal delivers strong resistance against prying, drilling, and cutting attempts. Its reinforced locking body ensures reliable protection, making forced removal extremely difficult without heavy-duty professional tools.

Tamper evident – Any unauthorized attempt to break or remove the seal will leave clear, irreversible visual evidence. This allows inspectors, logistics staff, and receivers to quickly confirm whether the cargo has been accessed during transit.

Unique serial number – Each unit is engraved with a permanent laser-printed serial number, enabling accurate identification and traceability. This feature helps prevent duplication while improving tracking efficiency across logistics and inventory systems.

One-time locking – Designed for single-use applications, the seal locks firmly once engaged and cannot be reopened. It must be removed using bolt cutters, ensuring any interference is immediately noticeable.

ISO 17712 certified – Meets international ISO 17712 high-security standards, making it suitable for global shipping and customs clearance processes where certified seals are required.

Weather resistant – Engineered to perform in extreme environments, including moisture, heat, and cold, ensuring long-lasting durability throughout sea, land, and rail transportation.

Easy application – The intuitive design allows users to quickly apply the seal by hand without additional tools, saving time and improving workflow efficiency.

Widely used – Ideal for securing containers, trailers, tanker trucks, and bonded cargo, offering flexible use across multiple transportation and logistics scenarios.

1.Q：What kind of company are we ?
A： Shandong Shengtang Intelligent Technology Co., Ltd. is a leading professional manufacturer of disposable security seals in China. Established in 2012, we have over 14 years of industry experience, supported by a 15,000㎡ modern factory, more than 200 skilled employees, and 450 advanced production machines, ensuring stable capacity and reliable global supply.Our main products include Plastic Seals, Bolt Seals, Cable Seals, Meter Seals, Padlock Seals, and Metal Seals Our products are exported to major global markets including Europe, North America, Southeast Asia, the Middle East, and South America.

2.Q：How can we guarantee products quality?
A: We implement a strict two-stage quality control system to ensure consistent and reliable product quality:
Pre-production samples are always provided for customer approval before mass production;
Final random inspection is conducted prior to shipment;

3.Q:what products can you buy from us?
A: We manufacture a full range of disposable security seals, including:
Plastic Seals, Cable Seals, Bolt Seals, Meter Seals, FRID Seals,Padlock Seals,Metal Strap Seals, Barrier Seals, Animal Ear Tags and others.
We also offer customized solutions, such as LOGO printing, laser serial numbering, barcodes, qrcode and special packaging if needed.

4. Q: Why should you buy from us not from other suppliers？
A：We have 14 years experiences, 300 sets of models with different styles , meet your different demands with fast delivery. All our material is environmental, and we won many honors from government.
We offer strong and flexible customization solutions for customers, helping customers create differentiated and competitive security seal products.
We have a comprehensive pre-sales service , In-Sales Service, and after-sales service system, to provide our customers with end-to-end services.

5.Q:Do you accept custom orders?
A: Yes. We provide comprehensive OEM & ODM customization services, including:
LOGO printing and unique serial numbering
Customized sizes, colors, materials, and packaging

6.Q:What certifications do you have?
A:We maintain a complete and internationally recognized certification system, including:
ISO 9001 – Quality Management System
ISO 14001 – Environmental Management System
ISO 45001 – Occupational Health & Safety Management System
ISO 17712 – High-Security Seal Certification
Third-party test reports from SGS and other authorized institutions