Bolt Seal: The ultimate guide you should know

Bolt seal simple description

 Bolt seal also called container seal, trailer seal, high security bolt seal, as the shape looks like a bullet, so the bolt seal also called bullet seal.

Bolt Seal Components

 Bolt Seal Components: The bolt seal consist of metal rod and the head. Metal rod, threaded or unthreaded, flexible or rigid, with a formed head, secured with a separate locking mechanism. 【1】

The bolt seal metal lock body adopts a clip spring structure on the inside. The bolt lock rod is made of cold-forged metal in one go. The lock body surface is galvanized and passivated. The outer surface is injected with ABS plastic. The bolt seal surface can be laser marked, coded, barcoded, etc., and the color can be customized according to the user’s needs. , a transparent cover is added to the lock body to protect the internal markings and prevent modification.

Bolt seal function

It provides a single source of information on mechanical which are acceptable for securing freight containers in international commerce.The purpose of mechanical seals is, as part of a security system, to determine whether a freight container has been tampered with, i.e. whether there has been unauthorized entry into the container through its doors.

Bolt Seal Colors

Bolt Seal Colors include: red, orange, yellow, green, blue, white, etc. Various other special colors can also be produced according to customer requirements.

Bolt Seal Marking

The ABS plastic layer can be laser-printed with company name, company LOGO, serial number, barcode, QR code, etc.


Bolt seal application: High-security seals are mainly used in trucks, vans, oil ships, various containers, container trucks, boxcars, railway transportation seals, supermarket seals, logistics transportation seals, bagged items sealing, and oil tank container sealing


Packaging: High-security seal packaging, 250 pieces per box, gross weight 24kg, net weight 22.5kg. Carton size: 29CM*39CM*13CM

Bolt seal Material

Product material: low carbon steel, the lock body is made of high-quality cold forged steel inside, equipped with O-shaped or diamond-shaped spring coils, and is made of ABS plastic on the outside. The outside is covered with plastic.

Bolt Seal Tensile strength

Tensile strength: F >15000N

Bolt Seal Size:

  • Bolt seal rod material: carbon steel/stainless steel
  • Bolt seal lock body size: 22mm/26mm, the diameter is 15mm/18mm
  • The hole diameter is 7mm/8mm.
  • Bolt seal rod height: 72mm/75mm/78mm/82mm/84mm/85mm.
  • Steel rod diameter: 7mm/8mm

How to remove the high-security seal

The high-security seal is a disposable safety lock tool that is tamper-proof and must be removed with bolt cutters after locking.

Bolt seal standard:

ISO 17712 Classes: H

ISO 17712 defines three types of classes of seal strength or barrier capacity: “I” for Indicative; “S” for Security; and “H” for High Security. C-TPAT requires the use of “H”class seals. Suppliers must use independent third party test laboratories to validate a seal’s classification. Labs must be accredited according to ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories) to perform testing specific to ISO 17712.

Bolt seal New Trend: RFID seal

The RFID bolt seal is equipped with a readable electronic label. The codes of the packaged product and the electronic label in the RFID seal can be set to correspond one to one, so that logistics management can be facilitated.

Compared with the shortcomings of the traditional bolt seal hat can be restored to its original state after being destroyed, the RFID bolt seal can make the radio frequency electronic tag in it unreadable after being destroyed, so that the cargo owner can know at the first time whether the sealed product has been opened.

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