PT Coupling’s success stems from an uncompromising commitment to our three core values: quality, service and integrity.


PT Coupling makes every effort to maintain customer satisfaction with a quality product, on time and at the lowest possible cost. As an ISO 9001 certified company, our demanding quality control standards help ensure our products are of exceptional quality.



PT Coupling is dedicated to provide unparalleled customer service by taking the time to listen to each of our customer’s needs and then applying our vast wealth of experience to not only meet, but exceed their expectations.



PT Coupling adheres to the highest ethical principles and professional standards in all of its dealings.


PT History

In 1951, R.C. Parrish founded a modest machining and drilling operation and named it Central Machine & Tool Company (CMT). He formed the company as a jobbing machine shop, but later recognized that manufacturing a set product line would be the key to building a strong reputation, and ensuring the company’s long-term success. At that point he started producing the cam and groove style hose couplings.

The Company began manufacturing quick connect/disconnect industrial hose fittings in 1955, and began marketing them worldwide as products of PT Coupling Company, in 1960. PT has long been known as a leader in the production of quick connect/disconnect fittings for the hose industry.

During the early 1960’s, CMT expanded and began to supply suspension parts, drive components, and transmission gears for large off-road trucks.

In the late 1960’s, a foundry for pouring ferrous and non-ferrous metals, including nodular iron, was added.

In 1984, Oklahoma Investment Casting Company (OICC) was acquired in Blackwell, OK, enabling us to produce complex castings with special heat treating and machining requirements.

In 1990, Specialty Plastics Company was added to the team as a plastic injection molding facility.

PUNCH-LOK® Company was purchased in Chicago, IL and moved to Enid in 1992. PUNCH-LOK® manufactures and distributes various hose clamps, fittings, banding and related installation tools.

In June 2000, ProGrip™ Coupling Company was purchased in Gardenia, CA as a manufacturing facility of crimp sleeves and ferrules for hose fittings and related products. Operations were moved to Enid in 2005 and merged with CMT. The ProGrip™ product line is distributed by PT Coupling.

Parrish Enterprises, Ltd. and its subsidiaries strive to serve our customers by providing a quality product, on time, at a competitive price. We could not provide the service that our customers have come to rely on without the efforts of all who are part of our organization.


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