CL4-20 Bolted Rail Clip (M20)
The CL4-20 is an M20 through-bolt crane rail clip with a bearing-type connection, one of the most widely specified bolted clips across the A-series crane rail range. Adjustable, hot-dip galvanizable, stocked in Brisbane and Cairns and supplied Australia-wide with no minimum order.
CL4-20 Through-Bolt Crane Rail Clip
The CL4-20, also written CL420, is an M20 through-bolt crane rail clip designed as a bearing-type connection for medium duty crane rail and standard rail installations. It uses a circular cam mechanism to lock the clip body against the rail foot, providing secure lateral restraint while allowing future adjustment or rail replacement.
The M20 bolt gives the CL4-20 higher load capacity than the CL4-16, making it one of the most widely used bolted clip configurations across the full range of A-series crane rail profiles and standard rail. The clip body and cam can be hot-dip galvanized without reducing lateral resistance ratings, making it suitable for outdoor and corrosive environments.
The clip top incorporates a vulcanized synthetic pressure block for rail retention and load absorption. Installation uses a standard M20 hex bolt, nut and hardened washer, and the modular pressure block can be replaced without replacing the entire clip top assembly. Inform Rail holds CL4-20 stock in Brisbane and Cairns for fast dispatch to projects across Australia.

CL4-20 at a Glance
Rail Profiles the CL4-20 Suits
The CL4-20 suits a wide range of crane rail profiles from A45 through to A120, as well as 41kg and 47kg standard rail. It is one of the most versatile bolted clip configurations in the range. For applications requiring extended lateral adjustment, the CLX-20 may be more appropriate.
Where the CL4-20 is Used
The CL4-20 suits installations across the full range of A-series crane rail where an M20 through-bolt bearing-type connection is appropriate. Its versatility across crane rail sizes makes it one of the most commonly specified bolted clips for overhead crane runway installations in Australia.
Other Bolted Rail Clips
The full CL and CLX bolted range, stocked alongside the M series welded clips.
CL4-20 Rail Clip, Common Questions
What is the CL4-20 crane rail clip used for?
What bolt size does the CL4-20 use?
What is the difference between the CL4-20 and CLX-20?
Can the CL4-20 be hot-dip galvanized?
How does the modular pressure block work?
Where can I buy CL4-20 rail clips in Australia?
How do I know if the CL4-20 is the right clip for my application?
Need CL4-20 Rail Clips?
Send us your rail profile, application details or project drawings and we'll come back with a practical supply option.