Acme Nuts

Acme nuts mate with Acme-threaded rod, studs, and lead screws — the trapezoidal thread form built for transmitting motion and carrying heavy axial loads in clamps, presses, vises, jacks, valves, and machine slides. Eugene Fastener & Supply stocks finished and heavy Acme hex nuts from 3/8″ through 2″ in standard pitches, in steel, with bronze available to order for lead-screw and high-cycle motion applications where bronze’s low friction and wear resistance matter.

Acme nuts pair directly with our Acme threaded rod, so you can order the rod and nuts as a matched motion assembly. We sell by the piece or in bulk, cross-reference Acme part numbers, and ship same day on orders placed before 2pm Pacific.

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Acme Nuts — for Lead Screws & Motion

Need Acme nuts and matched Acme rod for a lead-screw or motion application — in steel or bronze?

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Tell us the diameter, pitch (e.g., 1-5 Acme), finished or heavy, and material (steel or bronze).

Finished vs. Heavy Acme Hex Nuts

  • Finished Acme hex nut: standard hex dimensions for the diameter — the general choice for most Acme assemblies.
  • Heavy Acme hex nut: larger across the flats and taller, with more thread engagement for higher load and longer wear life.
  • Bronze Acme nut (to order): the traditional lead-screw nut — bronze runs against a steel Acme screw with low friction and excellent wear resistance, the standard pairing for hand-wheel and motion screws.

Sizes & Threads

Stocked from 3/8″ through 2″ in standard Acme pitches (e.g., 3/8-12, 1/2-10, 5/8-8, 3/4-6, 7/8-6, 1-5, 1-1/8-5, 1-1/4, 1-1/2-4, 1-3/4-4, 2-4), in finished and heavy patterns. Need a centralizing (2C/4C) class, a left-hand Acme, or bronze — contact us and we’ll source it.

Acme Nut FAQ

What is an Acme nut?

An Acme nut has an internal Acme (trapezoidal) thread that mates with Acme-threaded rod or a lead screw. The Acme form is designed to transmit motion and carry heavy axial loads efficiently — used in clamps, presses, vises, jacks, valves, and machine slides — rather than for general clamping like a standard 60-degree thread.

What’s the difference between Acme and standard threads?

Standard UN threads have a 60-degree V form optimized for clamping fasteners. Acme threads have a 29-degree trapezoidal form with a flat crest, optimized for transmitting motion and bearing load along the screw axis. Acme nuts and rod are not interchangeable with standard nuts and bolts.

Finished vs. heavy Acme hex nut — which do I need?

Use a finished Acme hex nut for general Acme assemblies. Choose a heavy Acme hex nut when you need more thread engagement and bearing for higher load or longer wear life. Match the diameter and pitch to your Acme rod exactly.

Do you carry bronze Acme nuts for lead screws?

Yes — bronze Acme nuts are available to order. Bronze running against a steel Acme screw gives low friction and excellent wear resistance, which is why it’s the traditional lead-screw and hand-wheel nut. Tell us the diameter and pitch and we’ll quote it.

Can I get matched Acme rod and nuts?

Yes. We stock Acme threaded rod alongside the nuts, so you can order a matched motion assembly — rod, nuts, and any couplers — from one source.

Do you sell by the piece and cross-reference part numbers?

Both by the piece and in bulk. Send any Acme part number, diameter, and pitch and we’ll match it, usually same business day.

Why Buy Acme Nuts from Eugene Fastener

  • Finished and heavy Acme hex nuts, 3/8″–2″, with bronze to order for lead screws.
  • Matched Acme rod from the same source.
  • By the piece or in bulk, with cross-reference help.
  • Since 1969 — serving Pacific Northwest industry for over 55 years.

Build the whole motion assembly: pair Acme nuts with our Acme threaded rod and coupling nuts. Browse all threaded rod and nut types, or contact our sales team for steel or bronze Acme, left-hand, or centralizing classes. Eugene Fastener & Supply — serving the Pacific Northwest since 1969.

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