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Nut Type Nut Type |
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| Round | Square |
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Diameter Diameter |
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Hardness Hardness |
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Tensile Strength Tensile Strength |
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Dynamic Thrust Load Capacity Dynamic ThrustLoad Capacity |
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Flange Hardness Flange Hardness |
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Selecting Compatible Lead Screws and Nuts
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Metric Acme Lead Screws and Nuts
Found in hand-powered clamps, vises, grates, doors, and work tables, lead screws and nuts have broad, square threads that are well suited for quick assembly, high clamping forces, and lifting and lowering heavy objects. To ensure compatibility, please select components that have the same thread direction, size, and pitch. Class 7E and 7H components are compatible.
932 bearing bronze components are more wear resistant than brass components. They have good machinability and fair corrosion resistance. 360 brass components have excellent machinability and good 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.
Flange nuts move objects along the length of a lead screw. They have a wide machinable flange for custom mounting.
Flange | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Ht., mm | Dia., mm | Dia., mm | Thick., mm | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Thread Fit | Hardness | Each | |
932 Bearing Bronze | ||||||||||||
| M10 | 2 | 35 | 28 | 48 | 12 | 1 | 1:1 | 2 | Class 7H | Not Rated | 000000000 | 0000000 |
| M12 | 3 | 35 | 28 | 48 | 12 | 1 | 1:1 | 3 | Class 7H | Not Rated | 000000000 | 00000 |
| M16 | 4 | 35 | 28 | 48 | 12 | 1 | 1:1 | 4 | Class 7H | Not Rated | 000000000 | 00000 |
| M20 | 4 | 44 | 32 | 55 | 12 | 1 | 1:1 | 4 | Class 7H | Not Rated | 000000000 | 00000 |
| M26 | 5 | 46 | 38 | 62 | 14 | 1 | 1:1 | 5 | Class 7H | Not Rated | 000000000 | 000000 |
| M40 | 7 | 66 | 63 | 98 | 16 | 1 | 1:1 | 7 | Class 7H | Not Rated | 000000000 | 000000 |
Hex nuts fasten and position lead screw components.
| Thread Size | Thread Pitch, mm | Ht., mm | Wd., mm | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Thread Fit | Fastener Strength Grade/Class | Hardness | Each | |
Carbon Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| M12 | 3 | 12 | 22.2 | 1 | 1:1 | 3 | Class 7H | Grade 2 | Not Rated | 000000000 | 000000 |
| M16 | 4 | 16 | 27 | 1 | 1:1 | 4 | Class 7H | Grade 2 | Not Rated | 000000000 | 00000 |
| M20 | 4 | 20 | 31.75 | 1 | 1:1 | 4 | Class 7H | Grade 2 | Not Rated | 000000000 | 00000 |
| M26 | 5 | 25.4 | 41.3 | 1 | 1:1 | 5 | Class 7H | Grade 2 | Not Rated | 000000000 | 00000 |
| M40 | 7 | 39.9 | 60.33 | 1 | 1:1 | 7 | Class 7H | Grade 2 | Not Rated | 000000000 | 00000 |
Square nuts fasten and position lead screw components. Square nuts have large sides, which make them easier to grip with a wrench than hex nuts and keep them from rotating in channels and square holes.
| Thread Size | Thread Pitch, mm | Ht., mm | Wd., mm | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Thread Fit | Hardness | Each | |
360 Brass | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 2 | 20 | 19 | 1 | 1:1 | 2 | Class 7H | Not Rated | 000000000 | 000000 |
| M12 | 3 | 25 | 25 | 1 | 1:1 | 3 | Class 7H | Not Rated | 000000000 | 00000 |
| M16 | 4 | 35 | 28 | 1 | 1:1 | 4 | Class 7H | Not Rated | 000000000 | 00000 |
| M20 | 4 | 50 | 38 | 1 | 1:1 | 4 | Class 7H | Not Rated | 000000000 | 00000 |
Metric Precision Acme 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 size.
360 brass nuts have excellent 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. | 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 | |
360 Brass | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 2 | 3/4" | 0.75" | 1 | 1:1 | 2 | Class 8E | Brinell 70 | Not Rated | 670 | DIN 103 | 0000000 | 000000 |
| M12 | 3 | 1" | 0.875" | 1 | 1:1 | 3 | Class 8E | Brinell 70 | Not Rated | 1,100 | DIN 103 | 0000000 | 00000 |
| M16 | 3 | 1 1/8" | 1.125" | 1 | 1:1 | 3 | Class 8E | Brinell 70 | Not Rated | 2,000 | DIN 103 | 0000000 | 00000 |
| M20 | 4 | 1 1/2" | 1.25" | 1 | 1:1 | 4 | Class 8E | Brinell 70 | Not Rated | 3,100 | DIN 103 | 0000000 | 00000 |
| M24 | 5 | 2" | 1.75" | 1 | 1:1 | 5 | Class 8E | Brinell 70 | Not Rated | 4,500 | DIN 103 | 0000000 | 00000 |
| M40 | 7 | 3" | 2.5" | 1 | 1:1 | 7 | Class 8E | Brinell 70 | Not Rated | 12,300 | DIN 103 | 0000000 | 00000 |
932 Bearing Bronze | |||||||||||||
| M28 | 5 | 2" | 1.75" | 1 | 1:1 | 5 | Class 8E | Brinell 69 | 44,000 | 6,100 | 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" | Class 8E | Brinell 126 | 75,000 | 670 | DIN 103 | 0000000 | 000000 |
| M12 | 3 | 3/4" | 1.125" | 1 | 1:1 | 3 | 15/16"-16 | 1/2" | Class 8E | Brinell 126 | 75,000 | 1,100 | DIN 103 | 0000000 | 00000 |
| M16 | 3 | 1" | 1.125" | 1 | 1:1 | 3 | 15/16"-16 | 1/2" | Class 8E | 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" | Class 8E | 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" | Class 8E | 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" | Class 8E | 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" | Class 8E | 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 | |
360 Brass | ||||||||||||||||
| M10 | 2 | 5/8" | 0.688" | 1 39/64" | 13/32" | 1 | 1:1 | 2 | 1 1/8" | Class 8E | 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" | Class 8E | 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" | Class 8E | 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" | Class 8E | 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" | Class 8E | Brinell 126 | Not Rated | 4,500 | DIN 103 | 0000000 | 00000 |
| M40 | 7 | 2 19/64" | 2.125" | 4 13/64" | 53/64" | 1 | 1:1 | 7 | 3 7/16" | Class 8E | Brinell 126 | Not Rated | 12,300 | DIN 103 | 0000000 | 000000 |
Manganese Bronze | ||||||||||||||||
| M28 | 5 | 1 3/4" | 2.125" | 4 13/64" | 53/64" | 1 | 1:1 | 5 | 3 7/16" | Class 8E | Brinell 126 | 75,000 | 6,100 | 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.
Nuts are acetal plastic; they 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.
External Thread | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Lg. | Dia. | Hex Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Size | Lg. | Tensile Strength, psi | Dynamic Thrust Load Cap., lbs. | Temperature Range, °F | Each | ||
Acetal Plastic | |||||||||||||||
| A | M2 | 0.5 | 11/16" | 0.297" | 7/16" | 1 | 1:1 | 0.5 | 3/8"-24 | 3/16" | 8,000 | 10 | -40° to 185° | 0000000 | 000000 |
| A | M4 | 0.3 | 11/16" | 0.297" | 7/16" | 1 | 1:1 | 0.3 | 3/8"-24 | 3/16" | 8,000 | 25 | -40° to 185° | 0000000 | 00000 |
| A | M8 | 1.5 | 1" | 0.548" | 11/16" | 1 | 1:1 | 1.5 | 5/8"-18 | 1/4" | 8,000 | 75 | -40° to 185° | 0000000 | 00000 |
Flange | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Lg. | Dia. | Dia. | Wd. | Ht. | Thick. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Mounting Hole Ctr.-to-Ctr. | Bolt Circle Dia. | Tensile Strength, psi | Dynamic Thrust Load Cap., lbs. | Temperature Range, °F | Each | ||
Acetal Plastic | ||||||||||||||||||
| B | M2 | 0.5 | 1/2" | 0.297" | __ | 3/4" | 13/32" | 1/8" | 1 | 1:1 | 0.5 | 39/64" | __ | 8,000 | 10 | -40° to 185° | 0000000 | 000000 |
| B | M4 | 0.3 | 1/2" | 0.297" | __ | 3/4" | 13/32" | 1/8" | 1 | 1:1 | 0.3 | 39/64" | __ | 8,000 | 25 | -40° to 185° | 0000000 | 00000 |
| C | M8 | 1.5 | 3/4" | 0.548" | 1 1/8" | __ | __ | 3/16" | 1 | 1:1 | 1.5 | __ | 7/8" | 8,000 | 75 | -40° to 185° | 0000000 | 00000 |