CUSTOM & PRECISION SHOULDER NUTS MANUFACTURER

Shoulder nuts are essential components in applications that require accurate seating, torque control, and alignment during assembly. Unlike standard nuts, shoulder nuts include an integrated locating surface—typically a machined boss or collar—that interfaces with surrounding components for precise positioning. This shoulder acts as a stop, spacer, or bearing surface, and demands consistent flatness, diameter, and perpendicularity to function as intended.
By machining these nuts instead of forming them, we’re able to achieve better control over thread quality, concentricity, and shoulder-to-thread transitions. The result is a product that installs smoothly, aligns consistently, and remains secure under load and vibration. Triangle’s process ensures not just fit—but repeatable, functional fit—across thousands of pieces, even in high-stress or motion-sensitive assemblies.

Triangle produces shoulder nuts in a variety of configurations, including standard hex profiles, slotted or recessed drive features, and special geometries for proprietary assemblies. We work with your designs to create nuts with exact shoulder heights, diameters, and thread engagement lengths. Whether you need an off-the-shelf design machined to tighter tolerances or a fully custom shoulder nut built from scratch, our CNC machining capabilities allow us to deliver consistent results.
We machine parts from carbon and alloy steels, stainless steel (including 303 and 416), brass, and specialty alloys depending on your mechanical and environmental needs. Finishes such as black oxide, passivation, or oil coating are available for corrosion protection or torque modification. And for customers who require small batches, prototype samples, or scalable long-term supply, we offer responsive lead times and production flexibility.

When precision matters—and it often does with shoulder nuts—mass-production methods can fall short. Triangle Machine Products delivers parts that are fully machined, not formed or stamped, ensuring a level of dimensional consistency that supports real-world reliability. Our in-house equipment and experienced team allow us to machine complex part features while holding tight tolerances on critical surfaces like shoulder diameters, thread concentricity, and bearing faces.
More importantly, we focus on being a partner, not just a supplier. We work closely with customers during the quoting and design process to ensure manufacturability, cost-efficiency, and long-term performance. Whether your shoulder nuts are used in high-speed rotating equipment, static mounting assemblies, or precision locating applications, Triangle brings the experience and equipment to machine them right—every time.