Our Quality Processes

complex and precise close-tolerance machining
bleeder valves, cold headed, threaded, thru hole
ISO 9001:2008 Seward Screw Products

Click the above image to view/download (PDF) our ISO 9001:2015 Certificate.

Certificate No. CERT-02493-2006-AQ-HOU-RvA

Initial Certification Date: November 5, 1999. Our Registrar is DNV-GL.


What distinguishes Seward Screw, LLC from our competition are three things: our ongoing dedication to quality; our unusual breadth of capabilities; and the focus we place on serving and completely satisfying our valued customers.

When we opened our doors in 1954, we did so with a commitment to absolutely delight our customers  . . . to earn their complete trust and confidence with every piece we manufacture and supply. Today, this same philosophy has provided us with an enviable customer roster of world-class OEMs and tier suppliers from diverse industries and markets . . . many who have shortened their supply chain by doing business with our midwestern facility.

Our quality assurance process begins when the order is received. Using our advanced product quality planning (APQP) process, we create a thorough plan to ensure the quality of every piece. 

Quality Policy:

Seward Screw LLC is committed to providing our customers with the highest value by continuously improving our products, processes and people.

Our manufacturing processes include:
■ single-spindle and multiple-spindle lathe machining
■ rotary transfer machining of bar or blanks
■ secondary machining in chucks horizontally or vertically
■ vertical broaching
■ roll forming of features on blanks

We have qualified sources for the following processes:
■ Lapping
■ De-burring
■ Gear Hobbing
■ Thread Adhesive
■ Plating
■ Heat Treating
■ Grinding
■ Broaching
■ Polishing

"It's very refreshing that every person we come into contact with at Seward Screw responds swiftly with the answers and information we need."

— customer response