High Security Heavy Duty Anti Tamper Proof Container Lock Metal Steel Bolt Seals With ABS Coating

Bolt seal  is a professional, one-time-use tamper-evident locking device designed to provide maximum security for cargo during transportation and storage.It is strictly compliant to ISO 17712:2013 (H-class) international standard, making it the first choice for global logistics, customs supervision, and high-value cargo protection. 
The bolt seal consists of two key components: a high-tensile carbon steel locking bolt (pin) and a heavy-duty barrel (body). The barrel (body) is made of high quality ABS, it effectively prevents rust and corrosion, allowing the seal to withstand harsh environmental conditions such as humidity, extreme temperatures, and transportation vibration.
Each bolt seal is equipped with a unique laser-etched serial number on both the pin and barrel, ensuring full traceability and accountability throughout the supply chain. Once locked, the seal can only be removed with bolt cutters, and any attempt to tamper with or open it will leave permanent, visible damage—providing clear evidence of unauthorized access.

Widely applied in various logistics scenarios, our bolt seal is primarily used for securing all kinds of ISO compliant shipping containers, which is its main application field.
It is also perfectly suitable for locking truck,van trucks,tank trucks, and trailer cargo doors, railway wagons, and freight cars, ensuring the safety of goods during long-distance transportation. In addition, it is an ideal choice for high-value goods such as electronics, pharmaceuticals, chemicals, and luxury goods, as well as customs-bonded shipments and C-TPAT compliant logistics operations. Whether it is sea, land, or air transportation, our bolt seal provides reliable security protection for your cargo.

1、High security structure – made of high-strength steel, anti-pry, anti-drill, anti-shear,making it extremely difficult to force open without professional tools.
2、Tamper evident – clear visible marks if broken or removed illegally,allows logistics personnel and customers to quickly inspect .
3、Unique serial number – laser printed for tracking and anti-counterfeiting, helping enterprises optimize supply chain management
4、One-time locking – cannot be reopened without bolt cutters.
5、ISO 17712 certified – accepted by customs globally for container security.
6、Weather resistant – durable for long-distance sea, land and rail transport.
7、Easy application – simple to lock, no extra tools needed,improving work efficiency.
8、Widely used – ideal for containers, trucks, tankers, customs cargo.

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