How to Order


PT Coupling only sells its products through distributors. Orders should be placed in your local region (see the regional branch warehouse listing). Extensive inventories of quick connect/disconnect couplings and replacement parts are maintained in our warehouses to ensure immediate shipment and delivery to our customers anywhere in the world. If your operations require a product not shown in this catalog or online, we will gladly work with you, our customer, in the custom design and manufacture of a product to meet your fitting specification.

It is the responsibility of the end user to communicate to the distributor the application and operating conditions the parts will be subjected to. It is up to the distributor to supply the right part for the application. PT Coupling is available to help you with a proper recommendation.

In any type of application, care must be taken to insure proper connection and a positive seal. Improperly fitted or applied connections can result in a serious accident and/or downtime. Under no circumstances shall the pressure rating of the couplings be exceeded. Please review our catalog for the pressure rating guidelines.

For prompt, efficient processing of your order, please follow this procedure:

  • Specify Distributor Account #
  • Specify PT Item # or Part Name
  • Specify Size and Material
  • Specify Quantity


All orders are solicited and accepted with the understanding that the purchaser agrees to the following terms and conditions:

Orders are subject to approval and acceptance by PT Coupling at the home office in Enid, OK.
The minimum order is $35.00.

PT Coupling attempts to ship all orders as promptly and efficiently as possible, however, orders are accepted with the express understanding that PT Coupling will not be liable for any losses or damages resulting from any delays in shipment or delivery.
Orders are subject to all government regulations, present and future.

Prices and design of products are subject to change without notice. Billings will be made at prices in effect at the time of shipment.
Shortage of shipments must be reported within 5 days after receipt of goods.
Quotes are valid for 2 weeks.

Custom-made parts are non-returnable. If there is no list price, parts are considered custom-made. Once custom-made parts are in production, there will be a cancelation fee if the order is canceled.


If for any reason, you desire to return goods to PT Coupling:

Products being returned for credits must be new and in resalable condition. A minimum handling charge of 15% is deducted from the price now in effect or purchase price, whichever is lower. This handling charge is necessary because of our practice of individually inspecting and testing every item returned and to cover the usual costs of handling returned goods. Any return goods that have been in use, must have material safety data sheets (MSDS) attached to the packing slip on the exterior of the shipping container. If not present, parts will be returned unopened. All returned goods require a Return Material Authorization (RMA) before credit will be given. Any returns without proper documentation will be returned to the customer at their expense.


Cam & Groove Fittings - Selecting For Your Operating Conditions & Applications

PT Coupling's Quick Connect/Disconnect Couplings provide for quick connecting and disconnecting by means of the "camming action". This camming action allows pipe and hose connections to be made without the need of hand tools or difficult thread connections. Cam and groove fittings are made up of two parts: male (adapter/plug) and female (coupler/socket) that work together. The male adapter is simply inserted into the female coupler until contact is made with the gasket. Both cam arms on the coupler are then pressed down/closed simultaneously, to produce a uniform gasket compression between the seal surfaces. This seal is created because the cam arms of the female coupler fit snugly against the groove of the male adapter. A positive seal requires that the surfaces on the gasket seat, the adapter face, and the gasket are smooth and uncontaminated. Also, cam arms must be in the full "closed" position for proper locking of the coupling. To disconnect, both arms must be lifted/opened simultaneously to release the seal and release the connection.

PT Coupling DOD Commerical Item Description

All PT Quick Connect/Disconnect Couplings (Cam & Groove Fittings) in every metal and size, 1/2" x 3/4" through 4" and 6" are manufactured to interchange with products produced to DOD Commercial Item Description A-A59326E. All "RFQ's" identified as "Government" will be quoted with the required components and castings to meet the A-A-59326E DOD Commerical Item Description (and for use with NATO equipment). Cam and Groove Fittings are interchangable among manufacturers, with the exception of 1/2", 5", 8" through 12" which may not be interchangable. Quality is controlled in every phase of manufacturing as required for compliance to A-A-59326E. PT Coupling's Quality Management System is certified and confirms to the requirements of ISO9001-2015.


Coupler Size (See Diagram Image):

  • For parts with a female (sockets) coupler end, the size is determined by measuring the opening end (X) of the coupler.
  • Understand that coupling size is an industry designation, not the actual measured size.
  • For the male (plug) adapter the size is determined by measuring the adapter plug end (Y). 
  • For threaded, hose barb or flange end, a threaded end can be male or female to match the type and size of your hose end fitting or tool. A barbed end inserts directly into a hose. Certain items are available with tapered or straight British Standard Pipe (BSP) threads. Flanged ends can be either pipe flange or tank car. 
  • Threaded end - Determine the pipe size used. Pipe size is an industry designation, not the actual measured size. Measure the Inside Diameter (ID) or Outside Diameter (OD) as shown in the drawing. Then round up the measurement to the closest ID or OD listed in the size chart and select the corresponding pipe size. 
    • Example: If ID (female) and OD (male) measures 1 3/16", the next highest ID or OD in the chart is 1 3/8" and the corresponding pipe size is 1". 
  • Hose (for use with hose barbed ends): PVC, Rubber Polyurethane, or Polyethylene hose
  • Clamps: Use original Punch-Lok® Center-Punch Clamps or banding, or an interlocked ProGrip® C50 Ferrule or C50 Crimp Sleeve.  

To learn more about the specific Operating Conditions for products, check out our Operating Conditions page.