Camlock fittings are one of the most widely used quick-connect couplings in industry, agriculture and water transfer. Also known as cam and groove couplings, they let you join and separate hoses, tanks, pumps and pipework in seconds, without tools. If you have ever wondered why there are so many types and materials to choose from, this guide breaks down the cam and groove system, walks through the standard A to F types plus the DP and DC end caps, and explains how to match the right material and gasket to your application.
How camlock fittings work
A camlock coupling is made up of two halves: a male adapter with a grooved end, and a female coupler with two pivoting arms, known as cams. To connect, you push the adapter into the coupler and pull the arms down. The arms press against the groove on the adapter, pulling the two halves tightly together and compressing a gasket inside the coupler to form a seal. To disconnect, you simply lift the arms.
This simple, reliable design is what makes camlocks so popular. There are no threads to cross, no spanners required, and a single operator can make a secure connection quickly. Because the parts are interchangeable across manufacturers when made to common patterns, they suit transfer applications where hoses are connected and disconnected often.
Cam and groove types: A, B, C, D, E, F and DP/DC
The standard cam and groove range uses letter designations to describe each part. Understanding the system makes specifying the right combination straightforward.
- Type A — male adapter with a female thread on the other end (BSP or NPT). Connects to a Type B, C or D, or onto threaded pipework.
- Type B — female coupler with a male thread on the other end. Pairs with a Type A, E or F.
- Type C — female coupler with a hose tail (hose shank) on the other end, for fitting directly to a hose.
- Type D — female coupler with a female thread on the other end.
- Type E — male adapter with a hose tail, used to terminate a hose with a male end.
- Type F — male adapter with a male thread on the other end.
- Type DP (dust plug) — a male-style plug that fits into a female coupler to seal and protect it when not in use.
- Type DC (dust cap) — a female-style cap with arms that closes over a male adapter to keep it clean and sealed.
In practice, a typical hose assembly might use a Type C coupler on one end and a Type E adapter on the other, with DP plugs and DC caps protecting the open ends during storage and transport.
Choosing the right material for your camlock fittings
Camlock fittings are commonly produced in several materials, each suited to different duties. The right choice depends on the fluid being transferred, the operating pressure and temperature, weight considerations and the working environment.
Aluminium
Aluminium camlocks are light, strong and economical, which makes them a popular general-purpose option. They are well suited to water, fuels, oils and many dry bulk applications. Aluminium is not ideal for highly corrosive chemicals or for prolonged contact with seawater and some acids, so always check compatibility before use.
Nyglass (glass-filled nylon)
Nyglass fittings are made from nylon reinforced with glass fibre, giving good strength while resisting corrosion and many chemicals that would attack metals. They are lighter than metal and a sensible choice where corrosion resistance matters but a full polypropylene fitting is not required. They suit many agricultural, irrigation and light industrial transfer tasks.
Polypropylene
Polypropylene camlocks offer excellent chemical resistance, particularly to acids, alkalis and many aggressive solutions. They are non-corroding and lightweight, which makes them the go-to option for chemical transfer, fertiliser, water treatment and similar duties. Polypropylene generally has lower pressure and temperature ratings than metal, so it is best matched to lower-pressure, ambient-temperature applications.
Gaskets and sealing
The gasket sits inside the female coupler and is what actually creates the seal, so it deserves as much attention as the fitting body. Common gasket materials include nitrile (Buna-N), which is a versatile general-purpose seal suited to water, oils and fuels; EPDM, which performs well with many water-based and chemical solutions; Viton (FKM), which handles a broad range of aggressive chemicals and higher temperatures; and PTFE, which offers very broad chemical resistance. Choosing a gasket that is compatible with both the fluid and the temperature is essential, as the wrong seal can swell, harden or fail prematurely.
Chemical compatibility and safe selection
No single material or gasket suits every fluid. Before specifying camlock fittings, confirm that the body material, the gasket and the hose itself are all compatible with the substance being transferred, at the relevant concentration and temperature. A reputable chemical resistance chart is a good starting point, and for unusual or concentrated chemicals it is worth seeking specific advice. Operating within the fitting's rated pressure and temperature, and inspecting arms, gaskets and grooves regularly for wear, keeps connections safe and leak-free.
At RX Rims, our camlocks and fittings are available in aluminium, nyglass and polypropylene to suit a wide range of duties, and our Australian made products are manufactured to relevant Australian and New Zealand Standards. You can browse our product range to see the options, and about RX Rims for more on our manufacturing background since 1969.
Get the right camlock fittings for the job
Matching the type, material and gasket correctly is the difference between a connection that performs reliably and one that fails. If you are unsure which combination suits your application, our team is happy to help. Contact us with your requirements or request a quote, and we will help you specify the right camlock fittings for safe, dependable transfer.