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High Security Bolt Seals 

Bolt seals are the industry standard for locking down shipping containers, trailers, and rail freight against tampering and theft. At Security Seals Direct, our bolt seals combine a solid steel pin with a reinforced ABS barrel, so every seal you buy is built to stop cargo theft before it starts, not just record it after the fact. 

Every bolt seal in this collection is manufactured to meet the strictest cargo-security benchmarks in the industry, which is why importers, exporters, freight forwarders, and logistics teams across the country rely on us as their supplier of choice for high security bolt seals.

What Is a Bolt Seal? 

A bolt seal is a one-time-use, tamper-evident locking device made of a metal pin (the "bolt") that inserts into a barrel-shaped housing and locks permanently in place. It cannot be opened by hand, only cut with bolt cutters, which means any broken seal is immediate, visible proof that a container, trailer, or railcar was accessed after sealing. This is what separates true bolt security seals from lighter-duty indicative seals: bolt seals are barrier seals, engineered to physically resist and delay forced entry, not just flag it.

Why Choose Our High Security Bolt Seals 

  • ISO 17712:2013 "H" (High Security) Certified

    Independently lab-tested to the international standard for barrier seals used on cargo containers.

  • C-TPAT Compliant

    Meets U.S. Customs-Trade Partnership Against Terrorism requirements for secure international shipping.

  • Laser-Etched Sequential Numbering

    Matching serial numbers on the pin and barrel prevent swap-and-reseal tampering.

  • Custom Branding Available

    Add your company name, logo, or barcode for chain-of-custody tracking.

  • Weather- and Corrosion-Resistant Build

    Reliable performance in ocean freight, cross-border trucking, and extreme climates alike.

Bolt Security Seals Built for USA Compliance 

If your business ships internationally, U.S. Customs and Border Protection expects every full container to carry a certified high-security seal at the point of loading. Our bolt security seals in USA shipping lanes are stocked and shipped from domestic warehouses, so CTPAT-certified importers and exporters can maintain uninterrupted compliance without waiting on overseas lead times.

Common Applications

Bolt seals are the go-to choice for ocean and intermodal shipping containers, over-the-road trailers, rail boxcars and hopper cars, tanker valves, and any high-value cargo movement where a broken seal needs to be unmistakable at a glance.

How to Choose the Right Bolt Seal

Match the pin diameter and length to your container or trailer locking mechanism, confirm you need ISO 17712 “H” (high security) rather than an indicative-only seal, and decide whether you need custom numbering, barcoding, or branding for your tracking system. Not sure which fits your fleet? Browse our full Cable Seals collection for a lighter-weight alternative, or contact our team for a same-day recommendation.

Frequently Asked Questions 1

What is a bolt seal used for?  

Bolt seals are used to lock and tamper-seal shipping containers, trailers, and railcars carrying high-value or import/export cargo. Once locked, they can only be removed by cutting, providing visible proof if a shipment has been opened in transit.

Are bolt seals reusable?  

No. Bolt seals are single-use, tamper-evident devices by design. Once the bolt is cut, the seal cannot be reset or reused, a new seal must be applied for every shipment.

What's the difference between a bolt seal and a cable seal?  

A bolt seal uses a rigid steel pin and barrel, offering maximum resistance to cutting and manipulation, making it the standard for high-value ocean and cross-border cargo. A cable seal uses a flexible steel cable, which is easier to apply to irregular closures like double-door trailers or tankers. Both can meet ISO 17712 high-security standards.

Do your bolt seals meet C-TPAT requirements?  

Yes. Our high security bolt seals are manufactured and lab-tested to ISO 17712:2013 "H" classification and meet C-TPAT requirements for U.S. import and export shipments.

Can bolt seals be customized with our company name or logo?  

Yes. We offer custom laser engraving, sequential numbering, barcoding, and company branding on bolt seal orders, contact our team for minimum order quantities and turnaround times.