Every container ship, railcar, and flatbed trailer that carries stacked ISO containers relies on one small but critical piece of hardware to keep the load exactly where it belongs: the container hook. Among the many designs on the market, the Grade 80 Container Hook, CTK Type, has become a go-to choice for lashing professionals who need a component that is compact, high-strength, and engineered specifically for the geometry of container corner castings.
The CTK hook is a forged steel fitting designed to engage the corner casting of a shipping container, forming a secure connection point for lashing chains, rods, or wire rope assemblies used in cargo securing systems. Unlike general-purpose lifting hooks, container hooks are shaped to hook directly into the standardized apertures of ISO container corner fittings, giving stevedores and lashing crews a fast, repeatable way to tension a container to a ship's deck, a flat rack, or an adjacent container in a stack.
H-Lift's CTK series is offered in three configurations to match different rigging angles and access directions on deck:
Having left, right, and straight variants matters in practice because lashing rods and turnbuckles approach the corner casting from different angles depending on the stack position and the securing pattern used. A single hook geometry rarely fits every application on a fully loaded vessel or railcar.
The "Grade 80" designation refers to the alloy steel grade used in forging, the same high-tensile grade used throughout H-Lift's chain and chain-fitting product lines. Grade 80 (also written as Grade 8) steel is quenched and tempered to deliver a significantly higher strength-to-weight ratio than older Grade 43 or Grade 70 chain.
Reputable Grade 80 container hooks in this class are forged (not cast), quenched and tempered, and proof-tested at up to twice the rated Working Load Limit before leaving the factory, with 100% magnetic-particle inspection to catch surface or subsurface forging defects. They comply with the EN 1677 series of standards governing forged steel components for slings.
A key operating rule is that the lifting/lashing angle should remain vertical to prevent hook disengagement, with a maximum allowable deviation of 45° from vertical. This is a critical safety detail: as the sling or lashing angle moves further from true vertical, the effective load on the hook throat increases and the risk of the load slipping off the hook tip rises sharply. This 45° figure is a hard limit, not a guideline.
Container hooks like the CTK type are a core component of cargo securing and lashing systems, working alongside turnbuckles, lashing rods, and twist locks to hold stacked containers firmly in place during transit.
While twist locks connect container-to-container or container-to-deck at the corner castings themselves, hooks such as the CTK type are typically paired with a lashing rod or chain-and-turnbuckle assembly to tension the connection diagonally from the corner casting down to a deck-mounted lashing point, resisting the racking and tipping forces containers experience in rough seas.
For international buyers and distributors evaluating a container hook supplier, a few checkpoints are worth confirming:
All three CTK variants share an identical Working Load Limit (12.5 tonnes) and dimensional profile, differing only in hook orientation.
| Item No. | WLL (t) |
Dimensions (mm) | Weight (kg) |
Product Code | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | M | H | E | R | Φ1 | Φ2 | L | ||||
| 8-CTK-S (Straight) |
12.5 | 46 | 75 | 166 | 46 | 60 | 70 | 25 | 265 | 4.125 | 502031001 |
| 8-CTK-L (Left-Hand) |
12.5 | 46 | 75 | 166 | 46 | 60 | 70 | 25 | 265 | 4.125 | 502031002 |
| 8-CTK-R (Right-Hand) |
12.5 | 46 | 75 | 166 | 46 | 60 | 70 | 25 | 265 | 4.125 | 502031003 |
