PT Coupling

ptcoupling.com

PT Coupling Company is a family-owned business founded by RC Parrish in 1951. PT is a division of Parrish Enterprises Ltd., aka Parrish Manufacturing Group. Parrish has 340 employees. PT is a US manufacturer of cam and groove hose couplings. Couplings are made from aluminum, brass, stainless steel, ductile iron, polypropylene, and nylon. PT stainless steel cam and groove couplings are produced in two foundries in the USA: Oklahoma Investment Castings in Blackwell, Oklahoma, acquired by Parrish Enterprises Ltd. in 1984, and Mississippi Precision Cast Parts in Columbus, MS, established in 1994 by Parrish Enterprises Ltd. Both investment casting foundries are ISO 9001 certified. Alloys poured are 316, 304, 17-4, carbon steel, alloy 20, and Hastelloy. Material certifications are provided on request. In Enid, OK, PT produces aluminum, brass, and ductile iron sand castings under the ISO 9001 quality system. Materials are all certified. Other capabilities are heat treatment of 356 T6 aluminum.