Camlock couplings or cam & groove couplings are an economical and durable option for quick connect/disconnect coupling for PVC Suction Hoses, Industrial Hoses and PVC Layflat Hoses used in agricultural irrigation, water transfer of construction and industries, and chemical & petroleum delivery.

Common Questions

When specifying a fitting, there are seven fields of information required. The acronym for this is STAMPED, which stands for:

S – Size

T – Temperature

A – Application

M – Material (or media being used)

P – Pressure rating required

E – End fittings & connections (thread type)

D – Delivery (any extras such as material certs)

Between manufacturers, cam & groove couplings are interchangeable with the exception of ½” (12.5mm), 5” and 8”. The A-A-59326A Mil Specification does not apply to 5” and 8” cam & groove couplings due to the presence of two versions of cam & groove couplings in today’s market.

Hose shanks with larger serrations are not designed to be assembled with a ferrule or sleeve. If swaged, this can result in permanent damage to the hose where larger shank serrations will cut into the inner wall of the hose. This results in leakage and/or permanent hose failure.

Note: Cam & Groove couplings must never be used for steam or compressed air applications.

The standard for cam & groove couplings is based on the US military specification Mil-C-27487 now superseded by A-A-59326D. The original specification was replaced by the new standard, but still guaranteed the interchangeability of couplings designed to the same specification. The Mil-C-27487 specified the casting methods, materials, dimensions, tolerances, pressure ratings, and inspection procedures.

European Standard

The European standard EN 14420-7 was approved by CEN in September 2004 and was applied to cam & groove couplings manufactured to the American military standard as outlined above. This American standard does not apply to the hose connection side, but only to the coupling side.

Camlock fittings produced to EN 14420-7 are interchangeable with those produced to the original MIL-C-27487 standard, but differ in terms of hose tail design, thread, and part number. A flat thread seal has been added to the female threaded parts and a smooth hose shank complying with EN 14420-7/DIN 2828 has been added for assembly with safety clamps complying with EN 14420-3/DIN 2817.