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.

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.

3D CAD models availableFor technical drawings and 3-D models, click on a part number.

Lead Screws—Right-Hand Threaded

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 7549K71 $11.83

M10 2 500 1 1:1 2 ±0.15 mm per 300 mm 8e Brinell 150 85,000 DIN 103 7549K72 23.67

M10 2 750 1 1:1 2 ±0.15 mm per 300 mm 8e Brinell 150 85,000 DIN 103 7549K73 35.50

M10 2 1,750 1 1:1 2 ±0.15 mm per 300 mm 8e Brinell 150 70,000 DIN 103 7549K1 66.81

M12 3 500 1 1:1 3 ±0.15 mm per 300 mm 8e Brinell 150 85,000 DIN 103 7549K74 26.08

M12 3 1,000 1 1:1 3 ±0.15 mm per 300 mm 8e Brinell 150 85,000 DIN 103 7549K75 52.17

M12 3 1,750 1 1:1 3 ±0.15 mm per 300 mm 8e Brinell 150 70,000 DIN 103 7549K2 78.24

M16 3 500 1 1:1 3 ±0.15 mm per 300 mm 8e Brinell 150 85,000 DIN 103 7549K76 27.44

M16 3 1,000 1 1:1 3 ±0.15 mm per 300 mm 8e Brinell 150 85,000 DIN 103 7549K77 54.90

M16 3 1,750 1 1:1 3 ±0.15 mm per 300 mm 8e Brinell 150 70,000 DIN 103 7549K4 82.33

M20 4 500 1 1:1 4 ±0.15 mm per 300 mm 8e Brinell 150 85,000 DIN 103 7549K78 34.52

M20 4 1,000 1 1:1 4 ±0.15 mm per 300 mm 8e Brinell 150 85,000 DIN 103 7549K79 69.04

M20 4 1,750 1 1:1 4 ±0.15 mm per 300 mm 8e Brinell 150 70,000 DIN 103 7549K6 103.61

M24 5 500 1 1:1 5 ±0.15 mm per 300 mm 8e Brinell 150 85,000 DIN 103 7549K81 43.02

M24 5 1,000 1 1:1 5 ±0.15 mm per 300 mm 8e Brinell 150 85,000 DIN 103 7549K82 86.04

M24 5 1,750 1 1:1 5 ±0.15 mm per 300 mm 8e Brinell 150 70,000 DIN 103 7549K7 129.06

M28 5 1,000 1 1:1 5 ±0.15 mm per 300 mm 8e Brinell 150 85,000 DIN 103 7549K83 95.27

M28 5 1,750 1 1:1 5 ±0.15 mm per 300 mm 8e Brinell 150 85,000 DIN 103 7549K84 142.92

M40 7 1,000 1 1:1 7 ±0.15 mm per 300 mm 8e Brinell 150 85,000 DIN 103 7549K85 171.27

M40 7 1,750 1 1:1 7 ±0.15 mm per 300 mm 8e Brinell 150 70,000 DIN 103 7549K12 256.90

Round Nuts—Right-Hand Threaded

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 7549K32 $29.63

M12 3 1" 0.875" 1 1:1 3 7H Brinell 70 Not Rated 1,100 DIN 103 7549K33 32.90

M16 3 1 1/8" 1.125" 1 1:1 3 7H Brinell 70 Not Rated 2,000 DIN 103 7549K35 35.65

M20 4 1 1/2" 1.25" 1 1:1 4 7H Brinell 70 Not Rated 3,100 DIN 103 7549K37 39.42

M24 5 2" 1.75" 1 1:1 5 7H Brinell 70 Not Rated 4,500 DIN 103 7549K38 53.04

M28 5 2" 1.75" 1 1:1 5 7H Brinell 69 44,000 6,100 DIN 103 7549K87 55.62

M40 7 3" 2.5" 1 1:1 7 7H Brinell 70 Not Rated 12,300 DIN 103 7549K43 99.35

Externally Threaded Nuts—Right-Hand Threaded

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 7549K88 $29.93

M12 3 3/4" 1.125" 1 1:1 3 15/16"-16 1/2" 7H Brinell 126 75,000 1,100 DIN 103 7549K89 32.54

M16 3 1" 1.125" 1 1:1 3 15/16"-16 1/2" 7H Brinell 126 75,000 2,000 DIN 103 7549K91 41.10

M20 4 1 1/4" 1.125" 1 1:1 4 1"-18 1/2" 7H Brinell 126 75,000 3,100 DIN 103 7549K92 52.68

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 7549K93 103.24

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 7549K94 105.32

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 7549K95 158.07

Flange Nuts—Right-Hand Threaded

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 7549K16 $73.36

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 7549K17 86.76

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 7549K19 77.40

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 7549K22 82.27

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 7549K23 99.21

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 7549K86 153.15

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 7549K27 270.10