In every industry where product integrity and cargo protection are crucial, security seals play a vital role in preventing loss and ensuring accountability. AC&M HS-75 and HS-115 Strap Seals represent the next generation of tamper-evident sealing technology, built for organizations that value reliability, compliance, and performance. Designed to secure everything from freight containers to warehouse assets, these seals demonstrate how thoughtful engineering and American precision can make all the difference in global supply chains.

At American Casting & Manufacturing, innovation has been at the heart of our mission for over a century. Our engineers continually refine how seals perform under stress, exposure, and repeated handling, allowing businesses to trust that their assets remain secure from departure to destination. Our tamper evident seals reflect this commitment, providing visible proof of security while maintaining durability in demanding environments. The HS-series strap seals embody this legacy of excellence by combining proven materials, high-strength locking mechanisms, and features that align with today’s ISO 17712 High Security standards.

Understanding the AC&M HS-75/115 Strap Seals

When organizations search for reliable plastic security seals, the HS-75 and HS-115 consistently emerge as top performers. Both models were designed to cater to a range of operational needs, from small-scale cargo shipments to large-scale transport networks. The numbers in each model name represent their lengths, 7.5 inches and 11.5 inches, allowing flexibility depending on the application’s size and locking requirements.

These strap seals are made from high-grade polypropylene and nylon blends that resist wear, ultraviolet exposure, and temperature extremes. Their unique locking cores and smooth strap designs provide secure closure without damaging the sealed surface. The materials also make them lightweight yet remarkably strong, ensuring that once the seal is applied, it remains intact until it is intentionally removed.

Another key advantage lies in AC&M’s precision molding technology. Each seal is crafted using advanced manufacturing processes that eliminate weak points and maintain dimensional accuracy. This meticulous attention to detail ensures consistent strength across every unit produced, helping companies maintain compliance with high-security shipping and storage regulations.

The HS-75 and HS-115 are not just another set of plastic security seals. They are verification tools that confirm proper handling, deter tampering, and provide visual assurance that no unauthorized access has occurred. From the moment they are locked, they stand as silent guardians protecting valuable goods across the supply chain.

Meeting International Standards: ISO 17712 and Cargo Seal Requirements

To achieve global credibility and ensure shipment integrity, security seals must comply with international standards that verify their performance and reliability. The ISO 17712 standard establishes the requirements for mechanical seals used on freight containers, enabling customs officials and logistics providers to verify that cargo has remained secure throughout transportation. This standard forms the foundation of international shipping security, establishing measurable benchmarks for tamper resistance and structural strength.

Under ISO 17712, seals are classified into three categories: Indicative, Security, and High Security (H). The High Security classification represents the most rigorous level, requiring seals to pass extensive tests for tensile strength, shear resistance, impact durability, and tamper evidence. AC&M’s HS-75 and HS-115 strap seals not only meet, but often exceed these standards. Their multi-layered locking cores prevent unauthorized reopening, while the high-strength polymer construction ensures any attempt at tampering leaves clear, visible signs. Each seal is produced with strict ISO-aligned quality control to guarantee reliability in demanding global operations.

For international transport, cargo seals must meet the ISO 17712:2013 (H) requirement to comply with U.S. Customs and Border Protection (CBP) and Customs-Trade Partnership Against Terrorism (C-TPAT) regulations. These standards protect global trade by ensuring that all containers are secured with verified high-security seals. The AC&M HS-series was engineered to meet these specifications, offering durable, tamper-evident protection for both domestic and international logistics. By choosing ISO-compliant seals, businesses demonstrate their commitment to secure trade, minimize risk, and maintain the highest levels of supply chain integrity.

Redefining the Standards of Plastic Strap Seals

The HS-series doesn’t simply meet existing standards. It raises them. Every feature was purposefully engineered to outperform conventional plastic strap seals and provide confidence under pressure.

Triple-Locking Mechanism for Superior Protection

At the core of each HS-series seal lies a three-stage locking system that functions as the primary defense against tampering.

• Primary Lock Tab: The first lock uses a solid tab that slides precisely over a deep cavity in the seal body. This fit prevents tools or wires from penetrating the lock chamber and maintains a consistent seal even during heavy vibration or movement.
  
  
• Interlocking Ridges: As the strap feeds into the housing, multiple ridges click into corresponding grooves, producing an audible confirmation of engagement. These clicks are not just satisfying feedback; they serve as proof that the seal is fully locked.
  
  
• Dual-Pointed Tabs: Reinforcing the system, two internal tabs anchor the strap from opposite sides, distributing pressure and preventing prying or reverse entry. Together, these components form an unbreakable bond that defies forced manipulation.

To further strengthen this design, AC&M’s model PS360 offers enhanced tensile strength and durability for demanding environments, making it an ideal choice for protecting long-distance cargo. Each element works in harmony with a plastic spring mechanism that absorbs shocks and prevents loosening during handling, ensuring lasting reliability even in the most challenging conditions.

Applications Across Industries

The HS-75 and HS-115 strap seals were initially designed for cargo transportation, but have evolved into trusted solutions across various industries. Their durability, tamper-evident design, and compliance with international standards make them essential wherever security and accountability are priorities. From securing shipments to protecting critical infrastructure, these seals demonstrate unmatched reliability in demanding environments. Their versatility continues to make them a preferred choice for businesses seeking long-term protection and operational confidence.

Transportation and Logistics: Trucking and shipping companies rely on these seals to secure trailers, containers, and cargo holds. The tamper-evident design assures that goods remain untouched from point A to B. For long-haul shipments, the high-pull strength and weather-resistant material make them dependable in all climates and conditions.

Energy and Utilities: In power plants, water facilities, and other utility sectors, HS-series seals protect critical equipment, including valves, control panels, and meters. Their durable construction prevents unauthorized operation and ensures compliance with safety protocols. To enhance accountability and traceability, many facilities incorporate Model PSW97, a plastic security wire seal that combines strength and versatility for applications requiring clear evidence of tampering.

Healthcare and Pharmaceuticals: Medical manufacturers and distributors use strap seals to secure medicine cartons, laboratory equipment, and sensitive materials during storage and transportation. The clear evidence of tampering supports quality assurance and regulatory compliance.

Government and Aerospace: Federal and defense agencies adopt AC&M seals to maintain chain-of-custody protocols. When used for documentation storage or equipment transport, the seals uphold confidentiality and security at every stage.

Each of these applications highlights the adaptability of the HS-series. Wherever accountability and trust are required, these seals perform beyond expectations.

Technology and Traceability in the HS Series

Modern supply chains depend on visibility as much as they do on security. The HS-series offers several advanced customization options that strengthen traceability from origin to destination.

• Laser Marking and Serialization: Each seal can be permanently laser-marked with a unique identification number. This prevents duplication and enables rapid verification through digital records or inspection logs.
  
  
• Barcoding and QR Integration: Optional barcodes or QR codes enable users to instantly scan and record seal data, connecting it to shipment management systems. This feature supports real-time tracking and enhances the accuracy of documentation.
  
  
• Tamper-Evident Indicators: Once applied, any attempt to manipulate or reseal the strap leaves visible signs of damage. These cues discourage tampering and make inspection straightforward even for untrained personnel.

For operations that require both physical strength and traceable verification, cable seals are often used in conjunction with the HS-series to secure larger cargo or high-value freight. By merging mechanical security with digital traceability, AC&M ensures that clients can adapt their sealing processes to modern compliance systems without sacrificing simplicity or performance.

Ease of Use and Field Performance

Despite their sophisticated engineering, HS-series seals were designed for intuitive use. Workers can apply them quickly without special tools, and their smooth locking motion eliminates the frustration commonly associated with lower-quality seals.

In field tests, the seals maintained their integrity despite exposure to vibration, moisture, and extreme temperatures. Their structure prevented cracking under stress, and the locking mechanism remained fully operational after repeated impact testing. These results underscore why the HS-series has become the benchmark for plastic strap seal performance.

Even in high-volume operations, where thousands of seals are applied daily, the consistent quality of AC&M manufacturing ensures uniform performance. This reliability translates directly into reduced waste, fewer re-sealing events, and improved operational safety.

A Century of Excellence in Sealing Solutions

Since 1910, American Casting & Manufacturing has been a trusted leader in security sealing technology, known for precision, integrity, and continuous innovation. For over 110 years, we have invested in advanced research, modern equipment, and superior materials to ensure that every seal meets and exceeds global performance standards. From the earliest lead seals to today’s advanced tamper-evident plastics, our legacy reflects a steadfast dedication to protecting what matters most: the integrity of your goods, your reputation, and your peace of mind. This commitment to quality and reliability has enabled AC&M to become one of the few manufacturers capable of meeting the evolving demands of industrial, commercial, and governmental clients worldwide.

For businesses seeking to enhance supply chain security, our AC&M HS-75/115 Strap Seals offer an exceptional combination of strength, compliance, and versatility. Whether you manage a fleet of trucks, safeguard critical infrastructure, or handle sensitive materials, our sealing solutions offer dependable protection at every stage. To learn more, contact our expert team. We are available Monday through Friday, from 9 a.m. to 5 p.m. EST, ready to assist you in selecting the right seal for your specific needs. Visit our About Page to explore our century-long legacy of innovation and discover why global businesses continue to trust American Casting & Manufacturing for ISO-compliant sealing solutions that stand the test of time.