Filter by
System of Measurement
Thread Size
Component
Nut Type
Thread Direction
Thread Type
Material
Threading
Hardness
Fastener Strength Grade/Class
RoHS
DFARS Specialty Metals
Export Control Classification Number (ECCN)
Finish
About Lead Screws and Nuts
%20--%3e%3csvg%20version='1.1'%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20xmlns:xlink='http://www.w3.org/1999/xlink'%20x='0px'%20y='0px'%20viewBox='0%200%20400%20400'%20style='enable-background:new%200%200%20400%20400;'%20xml:space='preserve'%3e%3cstyle%20type='text/css'%3e%20.st0{fill:%231A70A0;}%20.st1{opacity:0.5;}%20%3c/style%3e%3cg%3e%3cg%3e%3cpath%20class='st0'%20d='M200,56.9c38.35,0,74.4,14.93,101.51,42.05c27.11,27.11,42.05,63.17,42.05,101.51s-14.93,74.4-42.05,101.51%20S238.35,344.02,200,344.02s-74.4-14.93-101.51-42.05c-27.11-27.11-42.05-63.17-42.05-101.51s14.93-74.4,42.05-101.51%20S161.65,56.9,200,56.9%20M200,12.9C96.41,12.9,12.44,96.88,12.44,200.46c0,103.59,83.97,187.56,187.56,187.56%20c103.59,0,187.56-83.97,187.56-187.56C387.56,96.88,303.59,12.9,200,12.9L200,12.9z'/%3e%3c/g%3e%3cg%3e%3cg%20class='st1'%3e%3cpath%20class='st0'%20d='M235.49,152.24h16.15l-27.46,111.87c-1.94,7.8-2.91,12.5-2.91,14.1c0,1.82,0.58,3.29,1.73,4.41%20c1.16,1.12,2.69,1.68,4.61,1.68c5.23,0,11.78-3.85,19.63-11.55l17.22,21.34c-16.95,17.33-34.87,26-53.78,26%20c-8.37,0-15.45-1.47-21.23-4.41c-5.79-2.94-10.44-7.25-13.95-12.92c-3.51-5.67-5.27-11.18-5.27-16.53c0-1.93,0.35-5.24,1.05-9.94%20c1-6.94,2.05-12.54,3.15-16.82l15.22-62.15h-32.69l7.65-30.97C190.89,163.58,214.53,158.88,235.49,152.24z%20M230.44,80.84%20c8.24,0,14.66,2.62,19.26,7.86c4.6,5.24,6.9,11.55,6.9,18.94c0,5.46-1.42,10.7-4.25,15.73c-2.83,5.03-6.88,9.07-12.12,12.12%20c-5.24,3.05-10.33,4.57-15.24,4.57c-4.6,0-9.17-1.23-13.72-3.69c-4.55-2.46-8.02-5.78-10.43-9.95%20c-2.41-4.17-3.61-8.67-3.61-13.48c0-5.35,1.52-10.64,4.57-15.89c3.05-5.24,7.03-9.25,11.96-12.04%20C218.68,82.23,224.24,80.84,230.44,80.84z'/%3e%3c/g%3e%3cg%3e%3cpath%20class='st0'%20d='M214.08,152.24h16.15l-27.46,111.87c-1.94,7.8-2.91,12.5-2.91,14.1c0,1.82,0.58,3.29,1.73,4.41%20c1.16,1.12,2.69,1.68,4.61,1.68c5.23,0,11.78-3.85,19.63-11.55l17.22,21.34c-16.95,17.33-34.87,26-53.78,26%20c-8.37,0-15.45-1.47-21.23-4.41c-5.79-2.94-10.44-7.25-13.95-12.92c-3.51-5.67-5.27-11.18-5.27-16.53c0-1.93,0.35-5.24,1.05-9.94%20c1-6.94,2.05-12.54,3.15-16.82l15.22-62.15h-32.69l7.65-30.97C169.48,163.58,193.11,158.88,214.08,152.24z%20M209.03,80.84%20c8.24,0,14.66,2.62,19.26,7.86c4.6,5.24,6.9,11.55,6.9,18.94c0,5.46-1.42,10.7-4.25,15.73c-2.83,5.03-6.88,9.07-12.12,12.12%20c-5.24,3.05-10.33,4.57-15.24,4.57c-4.6,0-9.17-1.23-13.72-3.69c-4.55-2.46-8.02-5.78-10.43-9.95%20c-2.41-4.17-3.61-8.67-3.61-13.48c0-5.35,1.52-10.64,4.57-15.89c3.05-5.24,7.03-9.25,11.96-12.04%20C197.26,82.23,202.83,80.84,209.03,80.84z'/%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/svg%3e){kind=small}
Compare lead screws and nuts by the size, direction, fit, and starts of their threads.
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, thread size, and number of thread starts.
Lead Screws—Right-Hand Thread
 |
Carbon Steel—Carbon steel components are easier to machine than alloy steel components.
Alloy Steel—Alloy steel components are harder and stronger than carbon steel components.
18-8 Stainless Steel—18-8 stainless steel components have good corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
Thread Size | Thread Type | Lg. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Fastener Strength Grade/Class | Hardness | Tensile Strength | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Carbon Steel | ||||||||||||||
| 5/8"-6 | Acme | 12" | 1 | 1:1 | 0.167" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 64,000 psi | ASTM A108 | 98935A721 | 00000 | ||
| 5/8"-6 | Acme | 3 ft. | 1 | 1:1 | 0.167" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 64,000 psi | ASTM A108 | 98935A827 | 00000 | ||
| 5/8"-6 | Acme | 6 ft. | 1 | 1:1 | 0.167" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 64,000 psi | ASTM A108 | 98935A034 | 00000 | ||
Alloy Steel | ||||||||||||||
| 5/8"-6 | Acme | 12" | 1 | 1:1 | 0.167" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 psi | ASTM A193 | 93410A928 | 00000 | ||
| 5/8"-6 | Acme | 3 ft. | 1 | 1:1 | 0.167" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 psi | ASTM A193 | 93410A617 | 00000 | ||
| 5/8"-6 | Acme | 6 ft. | 1 | 1:1 | 0.167" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 psi | ASTM A193 | 93410A325 | 000000 | ||
18-8 Stainless Steel | ||||||||||||||
| 5/8"-6 | Acme | 12" | 1 | 1:1 | 0.167" | Acme Class 2G | — | Rockwell B96 | Not Rated | — | 95061A618 | 00000 | ||
| 5/8"-6 | Acme | 3 ft. | 1 | 1:1 | 0.167" | Acme Class 2G | — | Rockwell B96 | Not Rated | — | 95061A823 | 00000 | ||
| 5/8"-6 | Acme | 6 ft. | 1 | 1:1 | 0.167" | Acme Class 2G | — | Rockwell B96 | Not Rated | — | 95061A528 | 000000 | ||
Lead Screws—Left-Hand Thread
|
Carbon Steel—Carbon steel components are easier to machine than alloy steel components.
Alloy Steel—Alloy steel components are harder and stronger than carbon steel components.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
Thread Size | Thread Type | Lg., ft. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Fastener Strength Grade/Class | Hardness | Tensile Strength, psi | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Carbon Steel | ||||||||||||||
| 5/8"-6 | Acme | 3 | 1 | 1:1 | 0.167" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 64,000 | ASTM A108 | 98935A426 | 000000 | ||
| 5/8"-6 | Acme | 6 | 1 | 1:1 | 0.167" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 64,000 | ASTM A108 | 98935A427 | 00000 | ||
Alloy Steel | ||||||||||||||
| 5/8"-6 | Acme | 3 | 1 | 1:1 | 0.167" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 | ASTM A193 | 93410A429 | 000000 | ||
| 5/8"-6 | Acme | 6 | 1 | 1:1 | 0.167" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 | ASTM A193 | 93410A430 | 000000 | ||
Hex Nuts—Right-Hand Thread
 |
Hex nuts fasten and position lead screw components.
Carbon Steel—Carbon steel components are easier to machine than alloy steel components.
Zinc-Plated Carbon Steel—Zinc-plated carbon steel components have mild corrosion resistance and are easier to machine than alloy steel components.
18-8 Stainless Steel—18-8 stainless steel components have good corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
Thread Size | Thread Type | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Carbon Steel | |||||||||||||
| 5/8"-6 | Acme | 39/64" | 1 1/16" | 1 | 1:1 | 0.167" | Acme Class 2G | Rockwell B75 | Not Rated | 94815A029 | 00000 | ||
Zinc-Plated Carbon Steel | |||||||||||||
| 5/8"-6 | Acme | 39/64" | 1 1/16" | 1 | 1:1 | 0.167" | Acme Class 2G | Rockwell B75 | Not Rated | 98948A116 | 00000 | ||
18-8 Stainless Steel | |||||||||||||
| 5/8"-6 | Acme | 39/64" | 1 1/16" | 1 | 1:1 | 0.167" | Acme Class 2G | Rockwell B97 | Not Rated | 95066A141 | 00000 | ||
Hex Nuts—Left-Hand Thread
|
Hex nuts fasten and position lead screw components.
Carbon Steel—Carbon steel components are easier to machine than alloy steel components.
18-8 Stainless Steel—18-8 stainless steel components have good corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
Thread Size | Thread Type | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Fastener Strength Grade/Class | Hardness | Tensile Strength | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Carbon Steel | ||||||||||||||
| 5/8"-6 | Acme | 39/64" | 1 1/16" | 1 | 1:1 | 0.167" | Acme Class 2G | SAE Grade 2 | Rockwell B85 | 64,000 psi | 91808A027 | 00000 | ||
18-8 Stainless Steel | ||||||||||||||
| 5/8"-6 | Acme | 39/64" | 1 1/16" | 1 | 1:1 | 0.167" | Acme Class 2G | — | Rockwell B97 | Not Rated | 95066A371 | 00000 | ||
Fast-Travel Ultra-Precision Lead Screws and Nuts
 |  |  |
Style B | Style C |
Lead Screws—Right-Hand Thread
 |
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
Thread Size | Lg., ft. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Hardness | Tensile Strength, psi | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
303 Stainless Steel | ||||||||||||
| 5/8"-6 | 3 | Rounded Acme | 12:1 | 12 | 2" | ±0.0006"/1" | Brinell 160 | 90,000 | 6350K721 | 0000000 | ||
| 5/8"-6 | 6 | Rounded Acme | 12:1 | 12 | 2" | ±0.0006"/1" | Brinell 160 | 90,000 | 6350K102 | 000000 | ||
Flange Nuts—Right-Hand Thread
| |
Style B | Style C |
 |  |
Style B | Style C |
Acetal—Acetal nuts have good wear and corrosion resistance.
Wear-Compensating Spring—Flange nuts with wear-compensating internal O-ring or wear-compensating spring 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.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
Flange | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Style | Thread Size | Lg. | Dia. | Dia. | Thk. | Thread Type | Speed Ratio | Bolt Circle Dia. | No. of Thread Starts | Travel Distance per Turn | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lb. | No. of Mounting Holes | Each | |||
Acetal | ||||||||||||||||||
| B | 5/8"-6 | 1 1/2" | 0.875" | 1 1/2" | 3/16" | Rounded Acme | 12:1 | 1 3/16" | 12 | 2" | Not Rated | 9,700 | 220 | 3 | 6350K139 | 000000 | ||
Acetal with Wear-Compensating Spring | ||||||||||||||||||
| C | 5/8"-6 | 2" | 1.063" | 1 51/64" | 17/64" | Rounded Acme | 12:1 | 1 3/8" | 12 | 2" | Not Rated | 9,700 | 35 | 3 | 6350K177 | 00000 | ||
Self-Stopping Ball Screws and Nuts
 |
Stop Pin Shown Installed |
Keep your ball screw spinning without the ball nut damaging your system—a clutch-like collar inside the ball nut prevents it from travelling past the stop pins. Install the included stop pins anywhere along the length of the ball screw by drilling a hole in the valley of the threads (also known as the root) and pressing in the stop pin. When the collar meets the stop pin, the ball nut disengages from the threads and begins to idle. To start the ball nut travelling again, spin the ball screw in the opposite direction. All components are black-oxide steel and have mild corrosion resistance. To ensure compatibility, select components that have the same thread size. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.
Ball Screws—Right-Hand Threaded
 |  |
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
Root Diameter—Root diameter indicates the diameter the ball screw will be after machining away the threads.
Thread Size | Lg., ft. | No. of Thread Starts | Travel Distance per Turn | Root Dia. | Hardness | Tensile Strength, psi | Temp. Range, ° F | No. of Pins Included | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Black-Oxide Alloy Steel | ||||||||||||
| 5/8"-6 | 1 | 2 | 0.188" | 0.562" | Rockwell C56 | 95,000 | -65 to 300 | 2 | 2385N11 | 0000000 | ||
| 5/8"-6 | 2 | 2 | 0.188" | 0.562" | Rockwell C56 | 95,000 | -65 to 300 | 2 | 2385N12 | 000000 | ||
| 5/8"-6 | 3 | 2 | 0.188" | 0.562" | Rockwell C56 | 95,000 | -65 to 300 | 2 | 2385N13 | 000000 | ||
Externally Threaded Ball Nuts—Right-Hand Threaded
 |
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
Thread Size | Lg. | Dia. | No. of Thread Starts | Travel Distance per Turn | External Thread Size | Hardness | Dynamic Thrust Load Cap., lb. | Max. Backlash | Temp. Range, ° F | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Black-Oxide Alloy Steel | |||||||||||||
| 5/8"-6 | 1 7/8" | 1" | 2 | 0.188" | 15/16"-16 | Rockwell C56 | 300 | 0.006" | -65 to 300 | 2385N14 | 0000000 | ||
Flange Ball Nuts—Right-Hand Threaded
 |  |
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
Flange | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Lg. | Dia. | Dia. | Thk. | No. of Thread Starts | Travel Distance per Turn | Bolt Circle Dia. | Hardness | Dynamic Thrust Load Cap., lb. | Max. Backlash | Temp. Range, ° F | Each | |||
Black-Oxide Alloy Steel | |||||||||||||||
| 5/8"-6 | 1 7/8" | 1" | 2" | 13/32" | 2 | 0.188" | 1 5/8" | Rockwell C56 | 300 | 0.006" | -65 to 300 | 2385N15 | 0000000 | ||
