With our variety of machining centers (i. e. precision CNC, manual lathes, and mills) and our commitment to quality, we are focused on providing our customers with quality product and on time deliveries.

CMC produces a variety of complex valve components, such as

  • valve stems
  • seat cages
  • valve seats
  • retainers
  • yokes
  • bonnets
  • blocks

We can manufacture most valve components upon request and to customer drawings. We maintain calibrated thread gauges and typically manufacture internal and external threads up to and including 4” NPT and any standard thread up to 6”. We also specialize in Stub ACME threads.

Our standard dimensional capabilities range from 1/16” to 24” diameter and 1/8” to 24” in length.

Working to our customer supplied drawings, CMC is dedicated to providing quality parts to meet our customers’ needs.


We carry a wide variety of inventory. We stock various shapes and sizes of plate, pipe, flat, round, hex and square bar in both nuclear qualified and commercial grades.

Our inventory includes stainless, carbon and alloy steels, as well as brass and bronze, including but not limited to: 304/L, 316/L, 410, 416, 615, 630, and 660, as well as A36, A108, A105, A193, A434, F11, F22, F91, C93200, and C95400.

What we do not carry in-house, we are capable of providing through our suppliers of specialty metals. Through strategic partnerships that we have created, we are able to provide all chemical, mechanical, NDE, and testing required by our customers.

“Thanks for being a partner for many years… Colonial has provided and advised us of any stub end needs for welding fittings.”

“Great company and great people.”

“We appreciate the relationship we have with Colonial.”

“You have always been very helpful and timely with your responses.”

“Great company and super people. Been doing business with Colonial Machine for over 40 years. Very knowledgeable.”

“Overall the customer service is very good.”

“It is a pleasure to do business with Colonial Machine.”

“Colonial Machine is a preferred partner for us as they are a great company to work with.”

“I have been working with Colonial Machine for the past 13 years and they are a very knowledgeable machine shop that can produce quality parts.”

“Honestly one of the best companies that I’ve dealt with in my 44 years in the business.”

“Colonial is one of our favorite vendors!”

“Customer service responds promptly and very courteous to work with.”