Selecting Compatible Lead Screws and Nuts
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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.
Cast iron components have good machinability and high strength.
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.
Round nuts move objects along the length of a lead screw.
| Thread Size  | Ht. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Each | |
Cast Iron | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/2"-10 | 1" | 1 15/32" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B96 | 000000000 | 000000 |
| 5/8"-8 | 1 1/4" | 1 55/64" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | 000000000 | 00000 |
| 3/4"-5 | 1 1/2" | 2 15/64" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | 000000000 | 00000 |
| 3/4"-6 | 1 1/2" | 2 15/64" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | 000000000 | 00000 |
| 1"-5 | 2" | 2 63/64" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | 000000000 | 00000 |
| 1"-6 | 2" | 2 63/64" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | 000000000 | 00000 |
| 1"-10 | 2" | 2 63/64" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B96 | 000000000 | 00000 |
| 1 1/4"-5 | 2 1/2" | 3 47/64" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | 000000000 | 000000 |
| 1 1/2"-4 | 3" | 4 15/32" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B96 | 000000000 | 000000 |
Round nuts move objects along the length of a lead screw.
| Thread Size | Ht. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Each | |
Cast Iron | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/2"-10 | 1" | 1 15/32" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B96 | 000000000 | 000000 |
| 5/8"-8 | 1 1/4" | 1 55/64" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | 000000000 | 00000 |
| 3/4"-5 | 1 1/2" | 2 15/64" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | 000000000 | 00000 |
| 3/4"-6 | 1 1/2" | 2 15/64" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | 000000000 | 00000 |
| 1"-5 | 2" | 2 63/64" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | 000000000 | 000000 |
Thumb nuts fasten and position lead screw components. Thumb nuts are easy to grip and tighten by hand for quick assembly and disassembly.
Handles fasten and position lead screw components. Handles are easy to grip and tighten by hand for quick assembly and disassembly.
| Thread Size | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Each | |
Cast Iron | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 3/8"-12 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.083" | Class 2G | Rockwell B72 | 000000000 | 000000 |
| 1/2"-10 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B72 | 000000000 | 00000 |
| 5/8"-8 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B72 | 000000000 | 00000 |
| 3/4"-5 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B72 | 000000000 | 00000 |
| 3/4"-6 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B72 | 000000000 | 00000 |
| 7/8"-6 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B72 | 000000000 | 00000 |
| 1"-4 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B72 | 000000000 | 00000 |
| 1"-5 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B72 | 000000000 | 00000 |
| 1"-6 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B72 | 000000000 | 00000 |
| 1 1/4"-4 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B72 | 000000000 | 00000 |
| 1 1/4"-5 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B72 | 000000000 | 00000 |
| 1 1/2"-4 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B72 | 000000000 | 00000 |
Handles fasten and position lead screw components. Handles are easy to grip and tighten by hand for quick assembly and disassembly.
| Thread Size | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Each | |
Cast Iron | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 3/4"-5 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B72 | 000000000 | 000000 |
| 3/4"-6 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B72 | 000000000 | 00000 |
| 1"-5 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B72 | 000000000 | 00000 |
| 1"-6 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B72 | 000000000 | 00000 |
| 1 1/4"-4 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B72 | 000000000 | 00000 |
| 1 1/4"-5 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B72 | 000000000 | 00000 |
| 1 1/2"-4 | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B72 | 000000000 | 00000 |
Handles fasten and position lead screw components. Handles are easy to grip and tighten by hand for quick assembly and disassembly.
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.
Cast iron nuts have good machinability and high strength.
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. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Dynamic Thrust Load Cap., lbs. | Each | |
Cast Iron | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 3/8"-8 | 3/4" | 1.344" | 1 | 1:1 | 0.125" | Class 2C | Brinell 217 | Not Rated | 000000000 | 000000 |
| 3/8"-10 | 3/4" | 1.344" | 1 | 1:1 | 0.1" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 3/8"-12 | 3/4" | 1.344" | 1 | 1:1 | 0.083" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 3/8"-16 | 3/4" | 1.344" | 1 | 1:1 | 0.063" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 1/2"-10 | 1" | 1.469" | 1 | 1:1 | 0.1" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 5/8"-5 | 1 1/4" | 1.859" | 1 | 1:1 | 0.2" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 5/8"-8 | 1 1/4" | 1.859" | 1 | 1:1 | 0.125" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 5/8"-10 | 1 1/4" | 1.859" | 1 | 1:1 | 0.1" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 3/4"-5 | 1 1/2" | 2.234" | 1 | 1:1 | 0.2" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 3/4"-6 | 1 1/2" | 2.234" | 1 | 1:1 | 0.167" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 3/4"-10 | 1 1/2" | 2.234" | 1 | 1:1 | 0.1" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 7/8"-6 | 2" | 2.985" | 1 | 1:1 | 0.167" | Class 2C | Not Rated | Not Rated | 000000000 | 00000 |
| 1"-4 | 2" | 2.984" | 1 | 1:1 | 0.25" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 1"-5 | 2" | 2.984" | 1 | 1:1 | 0.2" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 1"-6 | 2" | 2.984" | 1 | 1:1 | 0.167" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 1"-10 | 2" | 2.984" | 1 | 1:1 | 0.1" | Class 2C | Brinell 217 | Not Rated | 000000000 | 000000 |
| 1 1/4"-4 | 2 1/2" | 3.734" | 1 | 1:1 | 0.25" | Class 2C | Brinell 217 | Not Rated | 000000000 | 000000 |
| 1 1/4"-5 | 2 1/2" | 3.734" | 1 | 1:1 | 0.2" | Class 2C | Brinell 217 | Not Rated | 000000000 | 000000 |
| 1 1/2"-4 | 3" | 4.469" | 1 | 1:1 | 0.25" | Class 2C | Brinell 217 | Not Rated | 000000000 | 000000 |
| Thread Size | Lg. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Dynamic Thrust Load Cap., lbs. | Each | |
Cast Iron | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 3/8"-8 | 3/4" | 1.344" | 1 | 1:1 | 0.125" | Class 2C | Brinell 217 | Not Rated | 000000000 | 000000 |
| 3/8"-10 | 3/4" | 1.344" | 1 | 1:1 | 0.1" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 3/8"-12 | 3/4" | 1.344" | 1 | 1:1 | 0.083" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 3/8"-16 | 3/4" | 1.344" | 1 | 1:1 | 0.063" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 1/2"-10 | 1" | 1.469" | 1 | 1:1 | 0.1" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 5/8"-5 | 1 1/4" | 1.859" | 1 | 1:1 | 0.2" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 5/8"-8 | 1 1/4" | 1.859" | 1 | 1:1 | 0.125" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 5/8"-10 | 1 1/4" | 1.859" | 1 | 1:1 | 0.1" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 3/4"-5 | 1 1/2" | 2.234" | 1 | 1:1 | 0.2" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 3/4"-6 | 1 1/2" | 2.234" | 1 | 1:1 | 0.167" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 3/4"-10 | 1 1/2" | 2.234" | 1 | 1:1 | 0.1" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 1"-4 | 2" | 2.984" | 1 | 1:1 | 0.25" | Class 2C | Brinell 217 | Not Rated | 000000000 | 000000 |
| 1"-5 | 2" | 2.984" | 1 | 1:1 | 0.2" | Class 2C | Brinell 217 | Not Rated | 000000000 | 000000 |
| 1"-6 | 2" | 2.984" | 1 | 1:1 | 0.167" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 1"-10 | 2" | 2.984" | 1 | 1:1 | 0.1" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 1 1/4"-4 | 2 1/2" | 3.734" | 1 | 1:1 | 0.25" | Class 2C | Brinell 217 | Not Rated | 000000000 | 000000 |
| 1 1/4"-5 | 2 1/2" | 3.734" | 1 | 1:1 | 0.2" | Class 2C | Brinell 217 | Not Rated | 000000000 | 000000 |
| 1 1/2"-4 | 3" | 4.469" | 1 | 1:1 | 0.25" | Class 2C | Brinell 217 | Not Rated | 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.
Cast iron nuts have good machinability and high strength.
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. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Dynamic Thrust Load Cap., lbs. | Each | |
Cast Iron | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1/4"-12 | 3/4" | 1.344" | 4 | 4:1 | 0.333" | Class 2C | Brinell 217 | Not Rated | 000000000 | 000000 |
| 3/8"-8 | 3/4" | 1.344" | 2 | 2:1 | 0.25" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 3/8"-8 | 3/4" | 1.344" | 4 | 4:1 | 0.5" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 3/8"-10 | 3/4" | 1.344" | 2 | 2:1 | 0.2" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 1/2"-8 | 1" | 1.469" | 2 | 2:1 | 0.25" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 1/2"-10 | 1" | 1.469" | 2 | 2:1 | 0.2" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |
| 1/2"-10 | 1" | 1.469" | 5 | 5:1 | 0.5" | Class 2C | Brinell 217 | Not Rated | 000000000 | 00000 |