Cable Seal
What makes a cable seal high security?
High-security cable seals use galvanized or stainless steel cable typically 1.5 mm to 5 mm in diameter and a metal locking body with a one-way mechanism that requires cutting for removal. Qualifying designs meet ISO 17712 high-security requirements, making them acceptable for international cargo sealing in controlled transport workflows.
Where are cable seals preferred over bolt seals?
Cable seals are preferred when closure points vary in spacing or shape, such as trailer doors, railcars, tanker hatches, drums, totes, and mixed industrial equipment, because the seal length is adjustable and spans irregular geometry. Bolt seals remain the better choice for standardized closures where maximum break strength is primary.
What failure does a cable seal actually prevent?
A cable seal does not make a container invulnerable. It creates a physical barrier plus tamper evidence, so unauthorized opening requires visible destructive removal. Its value is preventing silent access and providing a reliable exception signal when custody has been compromised.
A cable seal is a tamper-evident security seal made of a steel cable and a one-way locking body that cannot be reopened without cutting. It is used to secure containers, trailers, trucks, valves, and other closure points in transit or storage, providing visible evidence if a load is opened or altered.
In SupplyGrid-style inventory and material-control workflows, cable seals preserve chain of custody between dispatch, warehouse, and receiving points by physically locking access hardware and providing visible evidence if a load is opened or altered. Their flexible cable adapts to hasps, latch points, container rods, railcar fittings, drum rings, or mixed hardware, making them valuable where closure geometry varies. In a typical manufacturing scenario, seal numbers are recorded on shipping documents or receiving logs and verified at handoff through visual inspection and tug/twist checks before stock is posted. This supports raw-material control for high-value inbound lots, outbound finished goods, hazardous materials, and work in progress moving between plants or yards. At receiving, a broken or mismatched seal can trigger quarantine, discrepancy investigation, or customs and compliance review.
Loose-cable false security: Leaving slack in the cable or not fully enveloping the locking hardware lets a seal appear intact while the closure shifts and defeats tamper detection. Removing slack and performing tug/twist checks prevents this failure.
Wrong seal class: Choosing a cable seal when a bolt seal is required lowers break strength on standard container doors, while a rigid seal on irregular equipment creates bottlenecks and rework. Matching seal type to risk is critical.
Seal-number verification gaps: Failing to capture the seal ID at dispatch or match it to the ASN, BOL, or manifest at receiving causes missed theft, unnoticed short shipments, and delayed exception handling after stock is posted.