In 1942, with just 5 employees, Arnold Stock started Stock's Machine Company. On October 1, 1947, Stock's Machine Company incorporated as A. H. Stock Manufacturing Corp. Little did Arnold realize when he first started making aircraft parts for the Navy in 1943 the many changes that would take place over the years -- from having a watch tower for spotting planes during the Korean War to housing the Newton Fire Department from 1947 to 1963. Most of the original equipment for the fire department was manufactured here and, in 1957, when a new fire truck was necessary A. H. Stock Manufacturing met that need. Because of that association with the fire department, the company remains very involved with fire apparatus and equipment today and still has the capacity to empty a 3,500 gallon tanker filled with water in less than 1 minute.

We at A. H. Stock are proud of our many accomplishments over the past 56 years, of the quality products we have produced and the many fine employees who have given us their support. This support has allowed us to continue to grow, to meet changing demands and to explore new areas of interest.

AH Stock Manufacturing is Proud to be an ISO 9001:2015 Certified Manufacturer of Newton Kwik Dump Valves and Original Equipment Manufacturers Products, Including Precision Metal Fabrication, Painting and Assembly.

In March of 2013, A.H. Stock Manufacturing Corp. became certified in meeting the requirements of ISO 9001:2008 as Manufacturers of Newton Kwik Dump Valves and Original Equipment Manufacturers Products, Including Precision Metal Fabrication, Painting and Assembly.  This means that our company maintains a management system to the required standard and to conditions and schedules established by Verisys Registras (IAB Accreditation #7C558984).

ISO (International Organization for Standardization) is the world’s largest developer of voluntary International Standards. International Standards give state of the art specifications for products, services and good practice, helping to make industry more efficient and effective. Developed through global consensus, they help to break down barriers to international trade.