Selecting Compatible Lead Screws and Nuts
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Metric Precision Lead Screws and Nuts
Pair with a motor in automated motion and positioning applications. A tight thread fit allows these lead screws and nuts to make accurate, repeatable starts and stops. Also known as single-start and self-locking lead screws and nuts, they have a single thread that runs the length of the screw. The nut travels only when the screw turns, so your system won’t unexpectedly move when the lead screw is at rest. To ensure compatibility, select components that have the same thread direction, size, pitch, and number of thread starts.
Lead screws are 1018 carbon steel for good machinability.
932 bearing bronze nuts have good machinability and wear resistance. Manganese bronze nuts have good strength and wear resistance.
Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
For technical drawings and 3-D models, click on a part number.
| Thread Size  | Thread Pitch, mm | Lg., mm | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Accuracy for Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength, psi | Specifications Met | Each | |
1018 Carbon Steel | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 2 | 250 | 1 | 1:1 | 2 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 000000 |
| M10 | 2 | 500 | 1 | 1:1 | 2 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 00000 |
| M10 | 2 | 750 | 1 | 1:1 | 2 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 00000 |
| M10 | 2 | 1,750 | 1 | 1:1 | 2 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 70,000 | DIN 103 | 000000 | 00000 |
| M12 | 3 | 500 | 1 | 1:1 | 3 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 00000 |
| M12 | 3 | 1,000 | 1 | 1:1 | 3 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 00000 |
| M12 | 3 | 1,750 | 1 | 1:1 | 3 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 70,000 | DIN 103 | 000000 | 00000 |
| M16 | 3 | 500 | 1 | 1:1 | 3 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 00000 |
| M16 | 3 | 1,000 | 1 | 1:1 | 3 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 00000 |
| M16 | 3 | 1,750 | 1 | 1:1 | 3 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 70,000 | DIN 103 | 000000 | 00000 |
| M20 | 4 | 500 | 1 | 1:1 | 4 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 00000 |
| M20 | 4 | 1,000 | 1 | 1:1 | 4 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 00000 |
| M20 | 4 | 1,750 | 1 | 1:1 | 4 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 70,000 | DIN 103 | 000000 | 000000 |
| M24 | 5 | 500 | 1 | 1:1 | 5 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 00000 |
| M24 | 5 | 1,000 | 1 | 1:1 | 5 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 00000 |
| M24 | 5 | 1,750 | 1 | 1:1 | 5 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 70,000 | DIN 103 | 000000 | 000000 |
| M28 | 5 | 1,000 | 1 | 1:1 | 5 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 00000 |
| M28 | 5 | 1,750 | 1 | 1:1 | 5 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 000000 |
| M40 | 7 | 1,000 | 1 | 1:1 | 7 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 000000 |
| M40 | 7 | 1,750 | 1 | 1:1 | 7 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 70,000 | DIN 103 | 0000000 | 000000 |
| Thread Size | Thread Pitch, mm | Lg. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Thread Fit | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lbs. | Specifications Met | Each | |
932 Bearing Bronze | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 2 | 3/4" | 0.75" | 1 | 1:1 | 2 | 7H | Brinell 70 | Not Rated | 670 | DIN 103 | 0000000 | 000000 |
| M12 | 3 | 1" | 0.875" | 1 | 1:1 | 3 | 7H | Brinell 70 | Not Rated | 1,100 | DIN 103 | 0000000 | 00000 |
| M16 | 3 | 1 1/8" | 1.125" | 1 | 1:1 | 3 | 7H | Brinell 70 | Not Rated | 2,000 | DIN 103 | 0000000 | 00000 |
| M20 | 4 | 1 1/2" | 1.25" | 1 | 1:1 | 4 | 7H | Brinell 70 | Not Rated | 3,100 | DIN 103 | 0000000 | 00000 |
| M24 | 5 | 2" | 1.75" | 1 | 1:1 | 5 | 7H | Brinell 70 | Not Rated | 4,500 | DIN 103 | 0000000 | 00000 |
| M28 | 5 | 2" | 1.75" | 1 | 1:1 | 5 | 7H | Brinell 69 | 44,000 | 6,100 | DIN 103 | 0000000 | 00000 |
| M40 | 7 | 3" | 2.5" | 1 | 1:1 | 7 | 7H | Brinell 70 | Not Rated | 12,300 | DIN 103 | 0000000 | 00000 |
External Thread | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Lg. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Size | Lg. | Thread Fit | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lbs. | Specifications Met | Each | |
Manganese Bronze | |||||||||||||||
| M10 | 2 | 5/8" | 0.68" | 1 | 1:1 | 2 | 9/16"-18 | 3/8" | 7H | Brinell 126 | 75,000 | 670 | DIN 103 | 0000000 | 000000 |
| M12 | 3 | 3/4" | 1.125" | 1 | 1:1 | 3 | 15/16"-16 | 1/2" | 7H | Brinell 126 | 75,000 | 1,100 | DIN 103 | 0000000 | 00000 |
| M16 | 3 | 1" | 1.125" | 1 | 1:1 | 3 | 15/16"-16 | 1/2" | 7H | Brinell 126 | 75,000 | 2,000 | DIN 103 | 0000000 | 00000 |
| M20 | 4 | 1 1/4" | 1.125" | 1 | 1:1 | 4 | 1"-18 | 1/2" | 7H | Brinell 126 | 75,000 | 3,100 | DIN 103 | 0000000 | 00000 |
| M24 | 5 | 1 1/2" | 1.5" | 1 | 1:1 | 5 | 1 3/8"-16 | 1/2" | 7H | Brinell 126 | 75,000 | 4,500 | DIN 103 | 0000000 | 000000 |
| M28 | 5 | 1 3/4" | 2.125" | 1 | 1:1 | 5 | 1 31/32"-18 | 13/16" | 7H | Brinell 126 | 75,000 | 6,100 | DIN 103 | 0000000 | 000000 |
| M40 | 7 | 2 19/64" | 2.125" | 1 | 1:1 | 7 | 1 31/32"-18 | 13/16" | 7H | Brinell 126 | 75,000 | 12,300 | DIN 103 | 0000000 | 000000 |
Flange | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Lg. | Dia. | Dia. | Thick. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Bolt Circle Dia. | Thread Fit | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lbs. | Specifications Met | Each | |
Manganese Bronze | ||||||||||||||||
| M10 | 2 | 5/8" | 0.688" | 1 39/64" | 13/32" | 1 | 1:1 | 2 | 1 1/8" | 7H | Brinell 126 | Not Rated | 670 | DIN 103 | 0000000 | 000000 |
| M12 | 3 | 3/4" | 1.125" | 2 39/64" | 17/32" | 1 | 1:1 | 3 | 2 3/32" | 7H | Brinell 126 | Not Rated | 1,100 | DIN 103 | 0000000 | 00000 |
| M16 | 3 | 1" | 1.125" | 2 39/64" | 17/32" | 1 | 1:1 | 3 | 2 3/32" | 7H | Brinell 126 | Not Rated | 2,000 | DIN 103 | 0000000 | 00000 |
| M20 | 4 | 1 1/4" | 1.125" | 2 39/64" | 17/32" | 1 | 1:1 | 4 | 2 3/32" | 7H | Brinell 126 | Not Rated | 3,100 | DIN 103 | 0000000 | 00000 |
| M24 | 5 | 1 1/2" | 1.5" | 2 3/4" | 33/64" | 1 | 1:1 | 5 | 2 17/64" | 7H | Brinell 126 | Not Rated | 4,500 | DIN 103 | 0000000 | 00000 |
| M28 | 5 | 1 3/4" | 2.125" | 4 13/64" | 53/64" | 1 | 1:1 | 5 | 3 7/16" | 7H | Brinell 126 | 75,000 | 6,100 | DIN 103 | 0000000 | 000000 |
| M40 | 7 | 2 19/64" | 2.125" | 4 13/64" | 53/64" | 1 | 1:1 | 7 | 3 7/16" | 7H | Brinell 126 | Not Rated | 12,300 | DIN 103 | 0000000 | 000000 |
Metric Ultra-Precision Lead Screws and Nuts
Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these provide increased nut life and more reliable movement in automated systems. Also known as single-start and self-locking lead screws and nuts, they have a single thread that runs the length of the screw. The nut travels only when the screw turns, so your system won't unexpectedly move when the lead screw is at rest. To ensure compatibility, select components that have the same thread size, thread type, thread size, thread pitch, and number of thread starts.
Lead screws with one machinable end let you create your own custom connection to suit your application.
Lead screws with one coupling end connect directly with your shaft without extra machining. Torque down the locknut once inserted.
Alloy steel lead screws are hard and strong. 303 stainless steel lead screws have good corrosion resistance.
Flange nuts with wear-compensating internal O-ring maintain a tight fit even when their threads begin to wear. They resist backlash to maintain accuracy over time, which is important in positioning applications such as 3D printing and robotics.
Acetal nuts have good wear and corrosion resistance.
Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Thread Pitch, mm | Lg., mm | No. of Thread Starts | Thread Type | Speed Ratio | Travel Distance per Turn, mm | Accuracy for Travel Distance per Turn | Hardness | Tensile Strength, psi | Each | |
4140 Alloy Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| M8 | 1.5 | 100 | 1 | Metric Rounded Trapezoidal | 1:1 | 1.5 | ±0.089 mm per 300 mm | Brinell 200 | 125,000 | 0000000 | 000000 |
| M8 | 1.5 | 200 | 1 | Metric Rounded Trapezoidal | 1:1 | 1.5 | ±0.089 mm per 300 mm | Brinell 200 | 125,000 | 0000000 | 00000 |
| M8 | 1.5 | 300 | 1 | Metric Rounded Trapezoidal | 1:1 | 1.5 | ±0.089 mm per 300 mm | Brinell 200 | 125,000 | 0000000 | 00000 |
303 Stainless Steel | |||||||||||
| M2 | 0.5 | 50 | 1 | Metric Rounded Trapezoidal | 1:1 | 0.5 | ±0.089 mm per 300 mm | Brinell 160 | 90,000 | 0000000 | 00000 |
| M2 | 0.5 | 100 | 1 | Metric Rounded Trapezoidal | 1:1 | 0.5 | ±0.089 mm per 300 mm | Brinell 160 | 90,000 | 0000000 | 00000 |
| M4 | 0.3 | 75 | 1 | Metric Rounded Trapezoidal | 1:1 | 0.3 | ±0.089 mm per 300 mm | Brinell 160 | 90,000 | 0000000 | 00000 |
| M4 | 0.3 | 150 | 1 | Metric Rounded Trapezoidal | 1:1 | 0.3 | ±0.089 mm per 300 mm | Brinell 160 | 90,000 | 0000000 | 00000 |
17-4 PH Stainless Steel | |||||||||||
| M2 | 0.4 | 145 | 1 | Metric Rounded Trapezoidal | 1:1 | 0.375 | ±0.15 mm per 300 mm | Rockwell C35 | 145,000 | 000000000 | 000000 |
| M3 | 0.5 | 145 | 1 | Metric Rounded Trapezoidal | 1:1 | 0.5 | ±0.15 mm per 300 mm | Rockwell C35 | 145,000 | 000000000 | 000000 |
| M4 | 1 | 145 | 1 | Metric Rounded Trapezoidal | 1:1 | 1 | ±0.15 mm per 300 mm | Rockwell C35 | 145,000 | 000000000 | 000000 |
Machinable End | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Lg., mm | No. of Thread Starts | Thread Type | Dia., mm | Lg., mm | Speed Ratio | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Hardness | Tensile Strength, psi | Each | |
17-4 PH Stainless Steel | |||||||||||||
| M2 | 0.4 | 150 | 1 | Metric Rounded Trapezoidal | 7 | 25 | 1:1 | 0.375mm | ±0.15 mm per 300 mm | Rockwell C35 | 145,000 | 000000000 | 0000000 |
| M3 | 0.5 | 150 | 1 | Metric Rounded Trapezoidal | 7 | 25 | 1:1 | 0.5mm | ±0.15 mm per 300 mm | Rockwell C35 | 145,000 | 000000000 | 000000 |
| M4 | 1 | 150 | 1 | Metric Rounded Trapezoidal | 7 | 25 | 1:1 | 1mm | ±0.15 mm per 300 mm | Rockwell C35 | 145,000 | 000000000 | 000000 |
Coupling End | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Lg., mm | No. of Thread Starts | Thread Type | Dia., mm | Lg., mm | For Shaft Dia., mm | Speed Ratio | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Hardness | Tensile Strength, psi | Each | |
17-4 PH Stainless Steel | ||||||||||||||
| M2 | 0.4 | 150 | 1 | Metric Rounded Trapezoidal | 6.5 | 15 | 2 | 1:1 | 0.375mm | ±0.15 mm per 300 mm | Rockwell C35 | 145,000 | 000000000 | 0000000 |
| M3 | 0.5 | 150 | 1 | Metric Rounded Trapezoidal | 7.5 | 15.5 | 3 | 1:1 | 0.5mm | ±0.15 mm per 300 mm | Rockwell C35 | 145,000 | 000000000 | 000000 |
| M4 | 1 | 150 | 1 | Metric Rounded Trapezoidal | 8.5 | 15.5 | 4 | 1:1 | 1mm | ±0.15 mm per 300 mm | Rockwell C35 | 145,000 | 000000000 | 000000 |
| M4 | 1 | 150 | 1 | Metric Rounded Trapezoidal | 9.5 | 15.5 | 5 | 1:1 | 1mm | ±0.15 mm per 300 mm | Rockwell C35 | 145,000 | 000000000 | 000000 |
External Thread | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Lg. | Wd. | Ht. | Dia. | Hex Wd. | No. of Thread Starts | Thread Type | Speed Ratio | Travel Distance per Turn, mm | Size | Pitch | Lg. | Dynamic Thrust Load Cap., lbs. | Each | ||
Acetal Plastic | |||||||||||||||||
| A | M2 | 0.5 | 11/16" | __ | __ | 0.297" | 7/16" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.5 | 3/8"-24 | __ | 3/16" | 10 | 0000000 | 000000 |
| A | M4 | 0.3 | 11/16" | __ | __ | 0.297" | 7/16" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.3 | 3/8"-24 | __ | 3/16" | 25 | 0000000 | 00000 |
| A | M8 | 1.5 | 1" | __ | __ | 0.548" | 11/16" | 1 | Metric Rounded Trapezoidal | 1:1 | 1.5 | 5/8"-18 | __ | 1/4" | 75 | 0000000 | 00000 |
PEEK Plastic | |||||||||||||||||
| B | M2 | 0.4 | 5/16" | 0.22" | 0.197" | __ | __ | 1 | Metric Rounded Trapezoidal | 1:1 | 0.375 | M5 | 0.8mm | 9/64" | 2 | 000000000 | 00000 |
| B | M3 | 0.5 | 13/32" | 0.311" | 0.276" | __ | __ | 1 | Metric Rounded Trapezoidal | 1:1 | 0.5 | M7 | 0.75mm | 5/32" | 5 | 000000000 | 00000 |
| B | M4 | 1 | 1/2" | 0.402" | 0.354" | __ | __ | 1 | Metric Rounded Trapezoidal | 1:1 | 1 | M9 | 1mm | 13/64" | 10 | 000000000 | 00000 |
Flange | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Lg. | Dia. | Dia. | Wd. | Ht. | Thick. | No. of Thread Starts | Thread Type | Speed Ratio | Travel Distance per Turn, mm | Bolt Circle Dia. | Dynamic Thrust Load Cap., lbs. | Each | ||
Acetal Plastic | ||||||||||||||||
| C | M2 | 0.5 | 1/2" | 0.297" | __ | 3/4" | 13/32" | 1/8" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.5 | 39/64" | 10 | 0000000 | 000000 |
| C | M4 | 0.3 | 1/2" | 0.297" | __ | 3/4" | 13/32" | 1/8" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.3 | 39/64" | 25 | 0000000 | 00000 |
| D | M8 | 1.5 | 3/4" | 0.548" | 1 1/8" | __ | __ | 3/16" | 1 | Metric Rounded Trapezoidal | 1:1 | 1.5 | 7/8" | 75 | 0000000 | 00000 |
PEEK Plastic | ||||||||||||||||
| C | M2 | 0.4 | 9/32" | 0.209" | __ | 15/32" | 15/64" | 5/64" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.375 | 11/32" | 2 | 000000000 | 00000 |
| C | M3 | 0.5 | 21/64" | 0.295" | __ | 39/64" | 5/16" | 3/32" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.5 | 15/32" | 5 | 000000000 | 00000 |
| C | M4 | 1 | 13/32" | 0.354" | __ | 3/4" | 13/32" | 1/8" | 1 | Metric Rounded Trapezoidal | 1:1 | 1 | 19/32" | 10 | 000000000 | 00000 |
PEEK Plastic with Wear-Compensating Internal O-Ring | ||||||||||||||||
| C | M2 | 0.4 | 5/16" | 0.228" | __ | 15/32" | 15/64" | 5/64" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.375 | 11/32" | 1 | 000000000 | 000000 |
| C | M3 | 0.5 | 25/64" | 0.315" | __ | 39/64" | 5/16" | 3/32" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.5 | 15/32" | 2 | 000000000 | 000000 |
| C | M4 | 1 | 31/64" | 0.406" | __ | 3/4" | 13/32" | 1/8" | 1 | Metric Rounded Trapezoidal | 1:1 | 1 | 19/32" | 5 | 000000000 | 000000 |