Selecting Compatible Lead Screws and Nuts
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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, please select components that have the same thread direction, thread size, and number of thread starts.
Carbon steel lead screws and flanges have good machinability. Black-oxide alloy steel lead screws are hard and strong. They have mild corrosion resistance and a dark surface color. 303 and 304 stainless steel lead screws and flanges have 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.
| Thread Size  | Lg. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength, psi | Each | |
1018 Carbon Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1/4"-16 | 18" | 1 | 1:1 | 0.063" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 000000 |
| 1/4"-20 | 18" | 1 | 1:1 | 0.05" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
| 3/8"-10 | 18" | 1 | 1:1 | 0.1" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
| 3/8"-12 | 18" | 1 | 1:1 | 0.083" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
| 3/8"-16 | 18" | 1 | 1:1 | 0.063" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
| 1 1/2"-5 | 18" | 1 | 1:1 | 0.2" | ±0.0003" per in. | Class 2C | Brinell 126 | 53,000 | 000000000 | 00000 |
Black-Oxide 4140 Alloy Steel | ||||||||||
| 1/4"-16 | 18" | 1 | 1:1 | 0.063" | ±0.0003" per in. | Class 2C | Brinell 200 | 60,000 | 000000000 | 00000 |
| 1/4"-20 | 18" | 1 | 1:1 | 0.05" | ±0.0003" per in. | Class 2C | Brinell 200 | 60,000 | 000000000 | 00000 |
| 3/8"-12 | 18" | 1 | 1:1 | 0.083" | ±0.009" per ft. | Class 2C | Brinell 271 | 125,000 | 000000000 | 00000 |
| 1/2"-10 | 18" | 1 | 1:1 | 0.1" | ±0.009" per ft. | Class 2C | Brinell 271 | 125,000 | 000000000 | 00000 |
| 5/8"-8 | 18" | 1 | 1:1 | 0.125" | ±0.009" per ft. | Class 2C | Brinell 271 | 125,000 | 000000000 | 00000 |
| 3/4"-6 | 18" | 1 | 1:1 | 0.167" | ±0.009" per ft. | Class 2C | Brinell 271 | 125,000 | 000000000 | 00000 |
| 3/4"-8 | 18" | 1 | 1:1 | 0.125" | ±0.0003" per in. | Class 2C | Brinell 200 | 60,000 | 000000000 | 00000 |
| 3/4"-16 | 18" | 1 | 1:1 | 0.063" | ±0.0003" per in. | Class 2C | Brinell 200 | 60,000 | 000000000 | 00000 |
| 1"-5 | 18" | 1 | 1:1 | 0.2" | ±0.009" per ft. | Class 2C | Brinell 271 | 125,000 | 000000000 | 00000 |
| 1 1/4"-5 | 18" | 1 | 1:1 | 0.2" | ±0.009" per ft. | Class 2C | Brinell 271 | 125,000 | 000000000 | 00000 |
| 1 1/2"-4 | 18" | 1 | 1:1 | 0.25" | ±0.009" per ft. | Class 2C | Brinell 271 | 125,000 | 000000000 | 00000 |
| 2"-4 | 18" | 1 | 1:1 | 0.25" | ±0.009" per ft. | Class 2C | Brinell 271 | 125,000 | 000000000 | 000000 |
304 Stainless Steel | ||||||||||
| 1/4"-16 | 18" | 1 | 1:1 | 0.063" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
| 1/4"-20 | 18" | 1 | 1:1 | 0.05" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
| 3/8"-12 | 18" | 1 | 1:1 | 0.083" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
| 3/8"-16 | 18" | 1 | 1:1 | 0.063" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
| 5/8"-5 | 18" | 1 | 1:1 | 0.2" | ±0.0003" per in. | Class 2C | Brinell 170 | 31,000 | 000000000 | 00000 |
| 3/4"-8 | 18" | 1 | 1:1 | 0.125" | ±0.0003" per in. | Class 2C | Brinell 170 | 31,000 | 000000000 | 00000 |
| 1"-8 | 18" | 1 | 1:1 | 0.125" | ±0.0003" per in. | Class 2C | Brinell 170 | 31,000 | 000000000 | 000000 |
| 1 1/4"-4 | 18" | 1 | 1:1 | 0.25" | ±0.0003" per in. | Class 2C | Brinell 170 | 31,000 | 000000000 | 000000 |
| 1 1/2"-5 | 18" | 1 | 1:1 | 0.2" | ±0.0003" per in. | Class 2C | Brinell 170 | 31,000 | 000000000 | 000000 |
Fast-Travel Precision Acme Lead Screws and Nuts
Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. The threads have a tight thread fit for accurate, repeatable starts and stops. Pair with a motor in automated motion and positioning applications. To ensure compatibility, please select components that have the same thread direction, thread size, and number of thread starts.
Carbon steel lead screws and flanges have good machinability. 303 and 304 stainless steel lead screws and flanges have 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.
| Thread Size | Lg. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength, psi | Each | |
1018 Carbon Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1/4"-12 | 18" | 4 | 4:1 | 0.333" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 000000 |
| 1/4"-16 | 18" | 4 | 4:1 | 0.25" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
| 3/8"-8 | 18" | 2 | 2:1 | 0.25" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
| 3/8"-8 | 18" | 4 | 4:1 | 0.5" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
| 3/8"-10 | 18" | 2 | 2:1 | 0.2" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 0000 |
| 3/8"-12 | 18" | 2 | 2:1 | 0.167" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
304 Stainless Steel | ||||||||||
| 1/4"-12 | 18" | 4 | 4:1 | 0.333" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
| 3/8"-8 | 18" | 2 | 2:1 | 0.25" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
| 3/8"-8 | 18" | 4 | 4:1 | 0.5" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
| 3/8"-10 | 18" | 2 | 2:1 | 0.2" | ±0.009" per ft. | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
Ultra-Precision Lead Screws and Nuts
Operating with less backlash (play) than 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. All components are corrosion resistant for use in harsh environments. To ensure compatibility, select components that have the same thread type, thread size, and number of thread starts.
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 | Lg. | No. of Thread Starts | Thread Type | Speed Ratio | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Hardness | Tensile Strength, psi | Each | |
303 Stainless Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 9/64"-20.8 | 18" | 1 | Rounded Acme | 1:1 | 0.048" | ±0.0006" per in. | Brinell 160 | 90,000 | 0000000 | 000000 |
| 9/64"-41.7 | 18" | 1 | Rounded Acme | 1:1 | 0.024" | ±0.0006" per in. | Brinell 160 | 90,000 | 0000000 | 00000 |
| 7/32"-20.8 | 18" | 1 | Rounded Acme | 1:1 | 0.048" | ±0.0006" per in. | Brinell 160 | 90,000 | 0000000 | 00000 |
Fast-Travel Ultra-Precision Lead Screws and Nuts
Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. Operating with less backlash (play) than Precision Acme Lead Screws and Nuts, these lead screws and nuts provide increased nut life and more reliable movement in automated systems. All components are corrosion resistant for use in harsh environments. To ensure compatibility, select components that have the same thread type, thread size, and number of thread starts.
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 | Lg. | No. of Thread Starts | Thread Type | Speed Ratio | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Hardness | Tensile Strength, psi | Each | |
303 Stainless Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 9/64"-20.8 | 18" | 2 | Rounded Acme | 2:1 | 0.096" | ±0.0006" per in. | Brinell 160 | 90,000 | 0000000 | 000000 |
| 5/32"-21.3 | 18" | 2 | Acme | 2:1 | 0.094" | ±0.0006" per in. | Brinell 160 | 90,000 | 0000000 | 00000 |
| 3/16"-42.7 | 18" | 16 | Rounded Acme | 16:1 | 0.375" | ±0.0006" per in. | Brinell 160 | 90,000 | 0000000 | 00000 |
| 7/32"-20.8 | 18" | 4 | Rounded Acme | 4:1 | 0.192" | ±0.0006" per in. | Brinell 160 | 90,000 | 0000000 | 00000 |
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.
Carbon steel components are easier to machine than alloy steel components. Zinc-plated carbon steel components have mild corrosion resistance. 18-8 stainless steel components have good corrosion resistance.
Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Lg. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Fastener Strength Grade/Class | Hardness | Tensile Strength, psi | Specifications Met | Each | |
Zinc-Plated Carbon Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 3/4"-5 | 18" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 000000 |
| 3/4"-6 | 18" | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 00000 |
| 1"-5 | 18" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 00000 |
| 1 1/4"-5 | 18" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 00000 |
| 1 1/2"-4 | 18" | 1 | 1:1 | 0.25" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 000000 |
18-8 Stainless Steel | |||||||||||
| 3/4"-6 | 18" | 1 | 1:1 | 0.167" | Class 2G | __ | Rockwell B96 | Not Rated | __ | 000000000 | 00000 |
| 1"-5 | 18" | 1 | 1:1 | 0.2" | Class 2G | __ | Rockwell B96 | Not Rated | __ | 000000000 | 000000 |
| 1 1/4"-5 | 18" | 1 | 1:1 | 0.2" | Class 2G | __ | Rockwell B96 | Not Rated | __ | 000000000 | 000000 |