Mazak machinery

Making the Parts That Move the World Since 1923

You may not have heard of us, but chances are you’ve come across at least a few of our products!

While we’re a family business deeply rooted in St. Louis – we produced brass pieces that help to stabilize the steel structure of our hometown’s famous Arch - the parts and screws that we make have been everywhere: at play in sporting goods; at war in US Army rifle stocks and ammunition, under the oceans in Navy submarines and under the ground in mining equipment.

Because There Are No Unimportant Parts

Technology has changed since 1923, and we’ve changed with it. Parts and components have become increasingly complex, and today’s equipment, appliances and tools contain dozens of them. From our roots as a manufacturer of precision screws, through the decades we’ve become experts at producing the complicated parts that drive our world.

The only thing that hasn’t changed is our unyielding dedication to producing the highest-quality parts and screws. Family-owned and operated, three generations of Hackmanns are committed to upholding the hard-earned reputation for excellence.

Machined parts


machined parts

Whether your business needs simple parts or highly complicated components, Modern Screw has the capability to produce them to your exact specifications.

From Rails to Record Players

Have you ridden on a train or used a product shipped by rail? We’ve produced parts for the railroad industry. Listened to a record? We’ve produced parts used in turntables and record players. Taken a pill? Since 1950 we’ve made portable pill testers used by hospitals and pharmacies.

Equipped for Excellence

Our capabilities allow us to service nearly any industry’s needs. Whether it’s single spindle, screw machine parts, computer numerical controlled (CNC) lathes, Swiss screw machining or multi-tasking with a turn mill machine, we’re equipped to handle it all.

We’re able to do cam-driven for simple parts, faster speed for single parts, and high-tech for complicated parts that other manufacturers may be unable to handle. We’re also equipped with inspection equipment so you can rest assured that everything that we produce is inspected and will meet your exacting standards.

Machined Parts