Lead screw with a standard triangle nut, 12mm diameter, 1mm lead, 254mm length, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With exceptional lead accuracy of 0.003"/ft (76 µm/300 mm) and precision straightening from the only automated CNC lead screw straightening..
$72.57
Lead screw with a standard round nut, 254mm length, 12mm diameter, 1mm lead, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With an exceptional lead accuracy of 0.003"/ft (76 µm/300 mm), the lead screw exceeds industry standards, providing improved straightness, a..
$72.57
Lead Screw with a Round Anti-Backlash Nut featuring a 12mm diameter, 1mm lead, and a length of 254mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Round Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$83.74
Lead screw with a standard triangle nut, 10mm diameter, 5mm lead, 254mm length, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With exceptional lead accuracy of 0.003"/ft (76 µm/300 mm) and precision straightening from the only automated CNC lead screw straightening..
$72.57
Lead screw with a standard round nut, 254mm length, 10mm diameter, 5mm lead, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With an exceptional lead accuracy of 0.003"/ft (76 µm/300 mm), the lead screw exceeds industry standards, providing improved straightness, a..
$72.57
Lead Screw with a Round Anti-Backlash Nut featuring a 10mm diameter, 5mm lead, and a length of 254mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Round Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$83.74
Lead screw with a standard triangle nut, 10mm diameter, 1mm lead, 254mm length, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With exceptional lead accuracy of 0.003"/ft (76 µm/300 mm) and precision straightening from the only automated CNC lead screw straightening..
$72.57
Lead Screw with a Round Anti-Backlash Nut featuring a 10mm diameter, 1mm lead, and a length of 254mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Round Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$83.74
Lead screw with a standard rectangle nut, 6mm diameter, 4mm lead, 254mm length, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With exceptional lead accuracy of 0.003"/ft (76 µm/300 mm) and precision straightening from the only automated CNC lead screw straightening..
$68.83
Lead Screw with a Rectangle Anti-Backlash Nut featuring a 6mm diameter, 4mm lead, and a length of 254mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4 times..
$80.44
Lead screw with a standard rectangle nut, 6mm diameter, 1mm lead, 254mm length, and made of precision-rolled 300 Series stainless steel coated with PTFE to reduce friction and prevent flaking. With exceptional lead accuracy of 0.003"/ft (76 µm/300 mm) and precision straightening from the only automated CNC lead screw straightening..
$68.83
Lead Screw with a Rectangle Anti-Backlash Nut featuring a 6mm diameter, 1mm lead, and a length of 254mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4 times..
$80.44
Lead Screw with a Triangular Anti-Backlash Nut featuring a 12mm diameter, 1mm lead, and a length of 508mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Triangular Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$122.57
Lead Screw with a Triangular Anti-Backlash Nut featuring a 12mm diameter, 5mm lead, and a length of 508mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Triangular Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$122.57
Lead Screw with a Triangular Anti-Backlash Nut featuring a 12mm diameter, 5mm lead, and a length of 254mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Triangular Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$77.52
Lead Screw with a Triangular Anti-Backlash Nut featuring a 12mm diameter, 1mm lead, and a length of 254mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Triangular Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$77.52
Lead Screw with a Triangular Anti-Backlash Nut featuring a 10mm diameter, 1mm lead, and a length of 508mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Triangular Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$122.57
Lead Screw with a Triangular Anti-Backlash Nut featuring a 10mm diameter, 5mm lead, and a length of 508mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Triangular Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$122.57
Lead Screw with a Triangular Anti-Backlash Nut featuring a 10mm diameter, 5mm lead, and a length of 254mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Triangular Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$77.52
Lead Screw with a Triangular Anti-Backlash Nut featuring a 10mm diameter, 1mm lead, and a length of 254mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Triangular Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4..
$77.52
A lead screw, also called a leadscrew, is a precision threaded rod that converts rotary motion into controlled straight-line movement by causing a correspondingly threaded nut to travel along the screw and move a load on a single linear axis in what is called a lead screw assembly. Lead screw nuts are available in different shapes and styles, including the round, triangular, and rectangular nut categories shown below, while screws are offered in multiple diameters, thread profiles, pitches, leads, starts, and lengths for different loads, speeds, travel distances, and positioning requirements. Pitch is the distance between adjacent threads, lead is the distance the nut travels per screw revolution, and a start is one continuous helical thread; pitch and lead are equal on a single-start screw, while lead equals pitch multiplied by the number of starts on a multi-start screw.
PBC Linear lead screw assemblies combine precision-rolled, PTFE-coated 300 Series stainless steel screws with self-lubricating, PTFE-infused Frelon® composite polymer nuts to reduce friction, resist coating flake-off, distribute thread loads, and provide maintenance-free motion. Metric screw diameters range from 6mm to 16mm, with lead options from 1mm to 25mm, along with corresponding inch configurations. Round, triangular, and rectangular nuts are offered in traditional and Constant Force™ Anti-Backlash designs, with the anti-backlash nut using spring pressure to maintain thread engagement and deliver 2–4 times less backlash over its lifespan. PBC Linear precision-rolls and straightens its lead screws in-house using an Italian Galdabini PAS 4 STEP automated straightening machine to maintain lead accuracy of approximately ±0.003 inches per foot (76µm per 300mm), about three times more precise than many published competitor specifications and common industry standards. The gallery below features non-motorized assemblies organized by nut shape; motorized lead screw assemblies are listed separately as screw actuators.
Our Blog Posts About Lead Screws:
- How Are Lead Screws Made
- How to Check Lead Screw Accuracy and Straightness
- Lead Screw Precision in Medical Applications
- Lead Screw Straightener at PBC Linear
- Non-Captive Lead Screw Linear Actuators
- How to Prevent Lead Screw Load Drift
- Components of Lead Screws, Ball Screws and Linear Rails
- 3 Methods of Connecting Lead Screws to Motors
Glossary: What is Lead Screw Efficiency
Frequently Asked Questions
What is thread handedness and how does it relate to screw rotation direction?
Thread handedness describes whether a screw has right-hand or left-hand threads. In a typical lead screw assembly, the screw rotates and drives a matching threaded, non-rotating nut axially. The direction of that axial movement depends on both thread handedness and rotation direction. A right-hand thread and a left-hand thread will move the nut in opposite directions when rotated the same way. For a right-hand thread, turning the screw clockwise moves the nut away from the viewer when the screw is viewed from its end, assuming the nut is prevented from rotating. Reverse the rotation, and the nut moves toward the viewer.
What is the difference between a lead screw and screw lead?
A lead screw is the threaded mechanical component used to create linear motion. Screw lead is a measurement: the distance the nut or screw travels axially in one full rotation. In simple terms, the lead screw is the part, while screw lead describes how far it moves per turn.
What is an anti-backlash nut?
An anti-backlash nut is a lead screw nut designed to reduce axial clearance (axial play) between the screw and nut threads. It uses a spring-loaded section to maintain preload against the screw and keep the mating threads in contact. Backlash is the reversal error caused by this clearance, which allows the screw to turn slightly after changing direction before the nut begins to move. By reducing axial clearance without preventing normal travel along the lead screw, the nut improves repeatability, positioning control, and motion stability.
What is a leadscrew pitch, lead, and start?
Pitch is the distance between adjacent screw threads. Lead is the distance the nut travels during one full screw revolution. A start is one continuous helical thread running along the screw. On a single-start lead screw, pitch and lead are the same. On a multi-start lead screw, lead equals pitch multiplied by the number of starts.
What does PTFE coating do on a lead screw?
PTFE coating helps reduce friction, wear, and flaking between the lead screw and nut. It can also support smoother travel, quieter operation, and improved corrosion resistance, especially when used with stainless steel lead screws.
Can lead screws be motorized?
Yes. Lead screws can be paired with motors, hand cranks, knobs, or customer-supplied drive systems. Motorized lead screw assemblies are commonly used with linear guide components as compact linear actuators in positioning systems, adjustment mechanisms, and automation equipment.
Why are both “lead screw” and “leadscrew” used for the same term?
Both spellings describe the same mechanical component. “Lead screw” is the open compound form, while “leadscrew” developed as the closed engineering term. Merriam-Webster records the first known use of “leadscrew” in 1875, showing that the one-word spelling has been part of technical English since the early era of industrial machinery rather than being a modern variation.
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