Bolt seals are professional, single-use tamper-evident locking devices engineered to provide maximum security for cargo during transportation, storage, and international shipping. Fully compliant with ISO 17712:2013 (H-class) standards, they are widely recognized as a reliable solution for global logistics, customs inspection, container sealing, and high-value cargo protection where strict security control is required.
Each bolt seal is composed of two main components: a high-tensile carbon steel locking bolt (pin) and a heavy-duty locking barrel (body). The internal steel structure ensures exceptional strength and resistance to cutting or forced removal, while the outer barrel is manufactured from high-quality ABS material to prevent rust, corrosion, and environmental damage. This durable design allows the seal to perform consistently under harsh conditions such as moisture, extreme temperatures, long-distance transportation, and vibration.
For enhanced security and traceability, every bolt seal is marked with a unique laser-etched serial number on both the pin and the barrel, ensuring accurate identification and full tracking throughout the supply chain process. Once securely locked, the seal can only be removed using bolt cutters, and any attempt to tamper with or break the seal will result in permanent and visible damage, providing clear and reliable evidence of unauthorized access or interference.
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Model No |
ST8712 |
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Brand Name |
SHENGTANG |
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Application |
All kinds of ISO compliant shipping containers, truck,van trucks,tank trucks, and trailer cargo doors, railway wagons, and freight cars |
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Material |
High grade Q235A steel (pin & bush) |
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Certification |
with ISO9001, High Security ISO/PAS 17712:2013 certified |
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Height |
100mm |
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Diameter |
8mm |
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Printing type |
Laser printing |
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Printing content |
Serial Number, Letters,logo, barcode，qrcode, etc as customer required |
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MOQ |
1000Pcs |
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Package |
10pcs/box, 25boxes/carton as per customer required |
Widely applied across diverse logistics and supply chain scenarios, our bolt seal is specifically engineered for securing all types of ISO-compliant shipping containers, which remains its primary and most critical application field. Designed to meet the demands of international freight and customs supervision, it ensures reliable sealing performance throughout global transportation processes.
Beyond container security, it is also highly suitable for locking truck doors, van trucks, tankers, trailers, railway wagons, and freight cars, effectively preventing unauthorized access and safeguarding cargo integrity during long-haul transit. The robust construction makes it ideal for protecting high-value and sensitive goods, including electronics, pharmaceuticals, chemicals, and luxury products.
In addition, it is widely used in customs-bonded shipments and C-TPAT compliant logistics operations, helping businesses meet strict international security standards. Whether for sea freight, road transportation, or air cargo, our bolt seal delivers consistent, tamper-evident protection, ensuring your goods remain secure from origin to final destination.
High security structure – Manufactured from premium high-strength steel, this bolt seal features a robust locking mechanism with excellent resistance to prying, drilling, and shearing. Its solid construction significantly increases the difficulty of unauthorized removal, effectively protecting cargo from forced entry without specialized cutting tools.
Tamper evident – Designed with clear tamper-indicating features, the seal will display obvious and irreversible marks if it is broken, cut, or illegally removed. This enables logistics operators, inspectors, and end users to quickly verify the integrity of the shipment at a glance.
Unique serial number – Each seal is marked with a distinct laser-printed serial number that ensures permanent identification. This feature supports efficient tracking, prevents duplication or counterfeiting, and helps businesses enhance visibility and control across the entire supply chain process.
One-time locking – Engineered for single-use security, the seal automatically locks once applied and cannot be reopened or reused. Removal requires bolt cutters, ensuring that any attempt to access the secured goods will leave visible evidence of tampering.
ISO 17712 certified – Fully compliant with ISO 17712 standards for high-security seals, making it widely recognized and accepted by customs authorities and international shipping organizations for securing containers in global trade.
Weather resistant – Built to withstand harsh environmental conditions, including extreme temperatures, humidity, and corrosion. It maintains reliable performance throughout long-distance transportation by sea, land, and rail without degradation.
Easy application – Designed for user-friendly operation, the seal can be quickly and securely locked by hand without the need for additional tools. This simplifies the sealing process and significantly improves operational efficiency in busy logistics environments.
Widely used – Suitable for a broad range of applications, including ISO shipping containers, trucks, tanker vehicles, trailers, and customs-controlled cargo, making it a versatile solution for various transportation and security needs.
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
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