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 |
ST8713 |
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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) +ABS coated |
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Certification |
with ISO9001, High Security ISO/PAS 17712:2013 certified |
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Color |
Red,yellow, blue，green, white and customized color |
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Height |
74mm |
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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 |
Flexible |
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Package |
10pcs/box, 25boxes/carton |
Designed for versatile use in modern logistics systems, our bolt seal is primarily applied to secure ISO-standard shipping containers, making it an essential solution for international cargo transportation. Its high-security structure ensures compliance with global standards while maintaining cargo integrity across complex shipping routes.
It is also widely used for sealing truck doors, vans, tank trucks, trailers, railway wagons, and freight cars, offering strong protection against tampering and theft during transit. This makes it especially suitable for safeguarding valuable goods such as electronic devices, medical supplies, chemicals, and premium consumer products.
Additionally, the seal is ideal for customs-supervised cargo and C-TPAT logistics programs, helping businesses meet strict regulatory requirements. No matter the mode of transport—sea freight, road haulage, or air logistics—it delivers dependable and consistent cargo protection.
High security structure – Made from premium-grade carbon steel, this seal offers exceptional mechanical strength and resistance to tampering methods such as cutting, drilling, or forced twisting, ensuring maximum cargo protection.
Tamper evident – The seal provides visible and permanent signs of tampering once compromised, enabling quick and reliable inspection by logistics personnel and end users at any checkpoint.
Unique serial number – Equipped with a laser-marked identification number, each seal guarantees uniqueness and traceability, helping companies prevent fraud while enhancing supply chain transparency.
One-time locking – Once locked, the mechanism cannot be reversed or reused. Removal requires cutting tools, ensuring that any unauthorized access attempt is clearly detectable.
ISO 17712 certified – Complies with ISO 17712 requirements for high-security seals, widely accepted by customs authorities for international container shipments.
Weather resistant – Designed to withstand harsh climates and environmental exposure, maintaining stable performance during long-distance transport across various conditions.
Easy application – Simple push-and-lock mechanism allows fast installation without tools, reducing labor time and increasing operational efficiency.
Widely used – Commonly applied to containers, trucks, tankers, railcars, and secure cargo systems, providing dependable sealing across diverse industries.
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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