Heavy duty Bolt Seal,Self-locking by finger pressure High grade Q235A steel (pin & bush) and ABS plastic material, The product is a one-time use security lock, featuring high security, anti-counterfeiting and anti-theft functions. It can usually be used as a security lock for handling and transporting containers and goods in logistics. Usually, as anti-theft locks for customs sea transportation, locks for oil fuel transportation trucks, tanker trucks, trailers, etc. The factory direct price is relatively low, and it also supports customization of colors and printing content. High-quality sealing bolt seal supports laser printing. bolt seals can be customized with company logos, barcodes, serial numbers, etc. Factory safety packaging, supports customized packaging, fast delivery, good quality. High-security disposable container seals are crafted with durability and tamper-resistance at their core. Typically forged from hardened steel or a combination of Q235 steel and ABS plastic, they boast exceptional tensile strength, often exceeding 700 kilograms. This formidable construction ensures that the seal can withstand extreme physical force, harsh weather conditions, and the rigors of long-haul transportation, whether by sea, land, or air. High-security disposable container seals have emerged as a cornerstone of cargo protection, offering an unbreachable barrier against tampering, theft, and unauthorized access. These robust devices are engineered to meet the most stringent international standards, making them indispensable for shipping companies, freight forwarders, and customs authorities worldwide.Bolt seals are the gold standard for high-security applications, particularly in international shipping. Resembling heavy-duty bolts, they are inserted into the locking holes of container doors and secured with a pin that cannot be extracted without breaking the seal. Their solid steel construction makes them virtually impossible to tamper with using standard tools, making them ideal for high-value cargo, hazardous materials, and cross-border shipments subject to strict customs inspections.
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Model No |
ST8703 |
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Brand Name |
SHENGTANG |
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Material |
Pin: Carbon Steel (Galvanized), High grade Q235A steel (pin & bush) Cap: Polycarbonate plastic & Carbon Steel inner locking , ABS coated |
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Color |
1.Red,yellow,green,blue,white,black,orange,pink,gray ,purple etc. |
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Height |
80.5mm |
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Pin Diameter |
8mm |
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Width |
21.6mm |
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Printing type |
Laser printing |
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Printing content |
1.Hot stamping or laser printing |
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Certificate |
bolt seal with ISO9001,High Security ISO/PAS 17712:2013 certified |
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Package |
10pcs/box, 250pcs/ctn，carton size:50*32*13cm |
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Application |
Containers,Trucks Doors ,shipping cargo, transport, All kinds of ISO compliant containers,trailers, Trucks ,Van trucks,Tank trucks , Doors,cars,shipping, logistics, Postal services, Courier services, Bags, Airline Luggage,Airline,Liquor, Carts,Food Carts, Trolleys. |
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Usage |
Simple, no tool application, break attached shaft and cap Remove by bolt cutter, and eyes protection is necessary. |
Commonly used across shipping and intermodal container systems, these high-security seals are widely applied in ground transportation and logistics operations. They are suitable for all kinds of ISO-compliant containers, trailers, trucks, van trucks, tank trucks, cargo doors, railway freight cars, and various logistics equipment such as postal bags, courier parcels, airline luggage, food carts, and trolleys. Their versatility makes them an essential security solution across shipping, logistics, postal services, and airline industries.
Applied to cargo trucks, trailers, and railway freight cars, these seals effectively ensure cargo integrity throughout long-distance transportation, even under harsh environmental conditions. Built with high tensile strength and durable materials, they are capable of resisting impact, vibration, and extreme weather.
Advanced high-security seals can integrate RFID chips or QR codes, enabling remote identification and seamless synchronization with GPS tracking systems and digital logistics platforms. This allows real-time monitoring, traceability, and enhanced supply chain transparency.
Manufactured from hardened steel or Q235 steel combined with ABS plastic, these disposable seals deliver superior strength, often exceeding 700 kg of tensile resistance. Each seal features a unique laser-engraved serial number and a tamper-evident locking mechanism, ensuring that any unauthorized access attempt is immediately visible.
Types – Bolt Seals:
Bolt seals represent the highest level of security for container sealing applications. Designed like heavy-duty bolts, they are widely used in international shipping, especially for high-value cargo and customs-controlled shipments. Once locked, they cannot be removed without destruction, providing maximum protection and compliance with strict security standards.
Low cost with durable metal parts & easy use service – The product is designed to balance affordability and strength, using durable metal components that ensure stable performance while remaining simple and convenient for daily use in logistics operations.
Disposable security lock with anti - counterfeiting and tamper-proof features – As a single-use safety seal, it provides strong protection against tampering and duplication, ensuring that any unauthorized access is immediately detectable.
Factory direct sales, customizable samples, strict quality control – Direct manufacturing supply guarantees competitive pricing. We support sample customization and implement strict inspection procedures throughout production to ensure consistent quality.
Rich export experience with multiple transportation options – With years of export expertise and complete documentation support, we provide efficient logistics solutions via sea, air, and land to meet global customer requirements.
Multiple international certifications including ISO17712 – Certified under multiple international standards including ISO17712, ensuring compliance, reliability, and acceptance in global shipping and customs operations.
Exceptional tamper resistance – Built from high-strength steel materials, the seal resists cutting, drilling, and prying, offering dependable protection for high-value cargo.
Compliance with international standards – Meets ISO 17712:2013 requirements and supports C-TPAT compliance, ensuring smooth international logistics and customs procedures.
Cost-effective security solution – Offers high-level security at a reasonable cost, with an easy installation process that helps reduce operational expenses and improve efficiency.
Enhanced traceability and accountability – Each unit features unique identification markings, enabling precise tracking, audit control, and responsibility verification across the supply chain.
Versatile application – Suitable for a wide range of transportation scenarios such as containers, trucks, trailers, and rail freight, making it a flexible security solution.
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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