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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.
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.
Lead Screws—Right-Hand Threaded
| Thread Size  | Lg. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength, psi | Each | |
18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/4"-16 | 12" | 1 | 1:1 | 0.063" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1/4"-16 | 3 ft. | 1 | 1:1 | 0.063" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 1/4"-16 | 6 ft. | 1 | 1:1 | 0.063" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 3/8"-8 | 12" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 3/8"-8 | 3 ft. | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 3/8"-8 | 6 ft. | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 3/8"-10 | 12" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 3/8"-10 | 3 ft. | 1 | 1:1 | 0.1" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 3/8"-10 | 6 ft. | 1 | 1:1 | 0.1" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 3/8"-12 | 12" | 1 | 1:1 | 0.083" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 3/8"-12 | 3 ft. | 1 | 1:1 | 0.083" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 3/8"-12 | 6 ft. | 1 | 1:1 | 0.083" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 3/8"-12 | 12 ft. | 1 | 1:1 | 0.083" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1/2"-8 | 12" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 1/2"-8 | 3 ft. | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 1/2"-8 | 6 ft. | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1/2"-10 | 6" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 1/2"-10 | 12" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 1/2"-10 | 3 ft. | 1 | 1:1 | 0.1" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 1/2"-10 | 6 ft. | 1 | 1:1 | 0.1" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1/2"-10 | 12 ft. | 1 | 1:1 | 0.1" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 5/8"-6 | 12" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 5/8"-6 | 3 ft. | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 5/8"-6 | 6 ft. | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 5/8"-8 | 6" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 5/8"-8 | 12" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 5/8"-8 | 3 ft. | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 5/8"-8 | 6 ft. | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 5/8"-8 | 12 ft. | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 3/4"-5 | 6" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 3/4"-5 | 12" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 3/4"-5 | 3 ft. | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 3/4"-5 | 6 ft. | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 3/4"-5 | 12 ft. | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 3/4"-6 | 6" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 3/4"-6 | 12" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 3/4"-6 | 18" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 3/4"-6 | 3 ft. | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 3/4"-6 | 6 ft. | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 3/4"-6 | 12 ft. | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 3/4"-8 | 12" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 3/4"-8 | 3 ft. | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 3/4"-8 | 6 ft. | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 7/8"-6 | 12" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 7/8"-6 | 3 ft. | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 7/8"-6 | 6 ft. | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 7/8"-6 | 12 ft. | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1"-4 | 12" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 1"-4 | 3 ft. | 1 | 1:1 | 0.25" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1"-4 | 6 ft. | 1 | 1:1 | 0.25" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1"-5 | 6" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 00000 |
| 1"-5 | 12" | 1 | 1:1 | 0.2" | 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"-5 | 3 ft. | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1"-5 | 6 ft. | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1"-5 | 12 ft. | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1"-6 | 3 ft. | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1"-6 | 6 ft. | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1"-6 | 12 ft. | 1 | 1:1 | 0.167" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1"-8 | 3 ft. | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1"-8 | 6 ft. | 1 | 1:1 | 0.125" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1"-10 | 3 ft. | 1 | 1:1 | 0.1" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1"-10 | 6 ft. | 1 | 1:1 | 0.1" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1"-10 | 12 ft. | 1 | 1:1 | 0.1" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1 1/8"-5 | 3 ft. | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1 1/8"-5 | 6 ft. | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1 1/4"-4 | 3 ft. | 1 | 1:1 | 0.25" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1 1/4"-4 | 6 ft. | 1 | 1:1 | 0.25" | 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 |
| 1 1/4"-5 | 3 ft. | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1 1/4"-5 | 6 ft. | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1 1/4"-5 | 12 ft. | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1 1/2"-4 | 3 ft. | 1 | 1:1 | 0.25" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1 1/2"-4 | 6 ft. | 1 | 1:1 | 0.25" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1 1/2"-5 | 3 ft. | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 1 1/2"-5 | 6 ft. | 1 | 1:1 | 0.2" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 2"-4 | 3 ft. | 1 | 1:1 | 0.25" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
| 2"-4 | 6 ft. | 1 | 1:1 | 0.25" | Class 2G | Rockwell B96 | Not Rated | 000000000 | 000000 |
Coupling Nuts—Right-Hand Threaded
Coupling nuts connect two lead screws.
| Thread Size | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Each | |
18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/2"-10 | 1 1/4" | 5/8" | 1 | 1:1 | 0.1" | Class 2G | Not Rated | 000000000 | 000000 |
| 5/8"-8 | 2 1/8" | 7/8" | 1 | 1:1 | 0.125" | Class 2G | Not Rated | 000000000 | 00000 |
| 3/4"-5 | 2 1/4" | 1" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | 000000000 | 00000 |
| 3/4"-6 | 2 1/4" | 1" | 1 | 1:1 | 0.167" | Class 2G | Not Rated | 000000000 | 00000 |
| 7/8"-6 | 2 1/2" | 1 1/4" | 1 | 1:1 | 0.167" | Class 2G | Not Rated | 000000000 | 00000 |
| 1"-5 | 2 3/4" | 1 3/8" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | 000000000 | 00000 |
| 1"-6 | 2 3/4" | 1 3/8" | 1 | 1:1 | 0.167" | Class 2G | Not Rated | 000000000 | 00000 |
| 1"-10 | 2 3/4" | 1 3/8" | 1 | 1:1 | 0.1" | Class 2G | Not Rated | 000000000 | 00000 |
| 1 1/8"-5 | 3" | 1 1/2" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | 000000000 | 000000 |
| 1 1/4"-4 | 3" | 1 5/8" | 1 | 1:1 | 0.25" | Class 2G | Not Rated | 000000000 | 000000 |
| 1 1/4"-5 | 3" | 1 5/8" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | 000000000 | 000000 |
| 1 1/2"-4 | 3 1/2" | 2" | 1 | 1:1 | 0.25" | Class 2G | Not Rated | 000000000 | 000000 |
| 2"-4 | 4" | 3" | 1 | 1:1 | 0.25" | Class 2G | Not Rated | 000000000 | 000000 |
Hex Nuts—Right-Hand Threaded
Hex nuts fasten and position lead screw components.
| Thread Size | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Each | |
18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/4"-16 | 15/64" | 1/2" | 1 | 1:1 | 0.063" | Class 2G | Rockwell B97 | 000000000 | 000000 |
| 3/8"-8 | 23/64" | 11/16" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B97 | 000000000 | 00000 |
| 3/8"-10 | 23/64" | 11/16" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B97 | 000000000 | 00000 |
| 3/8"-12 | 23/64" | 11/16" | 1 | 1:1 | 0.083" | Class 2G | Not Rated | 000000000 | 00000 |
| 1/2"-8 | 31/64" | 7/8" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B97 | 000000000 | 00000 |
| 1/2"-10 | 31/64" | 7/8" | 1 | 1:1 | 0.1" | Class 2G | Not Rated | 000000000 | 00000 |
| 5/8"-6 | 39/64" | 1 1/16" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B97 | 000000000 | 00000 |
| 5/8"-8 | 39/64" | 1 1/16" | 1 | 1:1 | 0.125" | Class 2G | Not Rated | 000000000 | 00000 |
| 3/4"-5 | 47/64" | 1 1/4" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | 000000000 | 00000 |
| 3/4"-6 | 47/64" | 1 1/4" | 1 | 1:1 | 0.167" | Class 2G | Not Rated | 000000000 | 00000 |
| 3/4"-8 | 47/64" | 1 1/4" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B97 | 000000000 | 00000 |
| 7/8"-6 | 55/64" | 1 1/2" | 1 | 1:1 | 0.167" | Class 2G | Not Rated | 000000000 | 00000 |
| 1"-4 | 63/64" | 1 5/8" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B97 | 000000000 | 00000 |
| 1"-5 | 63/64" | 1 5/8" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | 000000000 | 00000 |
| 1"-6 | 63/64" | 1 5/8" | 1 | 1:1 | 0.167" | Class 2G | Not Rated | 000000000 | 00000 |
| 1"-8 | 63/64" | 1 5/8" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B97 | 000000000 | 00000 |
| 1"-10 | 63/64" | 1 5/8" | 1 | 1:1 | 0.1" | Class 2G | Not Rated | 000000000 | 00000 |
| 1 1/8"-5 | 1 7/64" | 1 3/4" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | 000000000 | 00000 |
| 1 1/4"-4 | 1 1/4" | 2" | 1 | 1:1 | 0.25" | Class 2G | Not Rated | 000000000 | 00000 |
| 1 1/4"-5 | 1 7/32" | 2" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | 000000000 | 00000 |
| 1 1/2"-4 | 1 15/32" | 2 1/4" | 1 | 1:1 | 0.25" | Class 2G | Not Rated | 000000000 | 000000 |
| 1 1/2"-5 | 1 1/2" | 2 1/4" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B97 | 000000000 | 000000 |
| 2"-4 | 1 31/32" | 3" | 1 | 1:1 | 0.25" | Class 2G | Not Rated | 000000000 | 000000 |
| 2 1/4"-4 | 2 1/2" | 3 1/2" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B97 | 000000000 | 000000 |
| 2 1/2"-4 | 2 1/2" | 3 1/2" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B97 | 000000000 | 000000 |
Hex Nuts—Left-Hand Threaded
Hex nuts fasten and position lead screw components.
| Thread Size | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Each | |
18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/4"-16 | 15/64" | 1/2" | 1 | 1:1 | 0.063" | Class 2G | Rockwell B97 | 000000000 | 000000 |
| 3/8"-8 | 23/64" | 11/16" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B97 | 000000000 | 00000 |
| 3/8"-10 | 23/64" | 11/16" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B97 | 000000000 | 00000 |
| 3/8"-12 | 23/64" | 11/16" | 1 | 1:1 | 0.083" | Class 2G | Not Rated | 000000000 | 00000 |
| 1/2"-8 | 31/64" | 7/8" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B97 | 000000000 | 00000 |
| 1/2"-10 | 31/64" | 7/8" | 1 | 1:1 | 0.1" | Class 2G | Not Rated | 000000000 | 00000 |
| 5/8"-6 | 39/64" | 1 1/16" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B97 | 000000000 | 00000 |
| 5/8"-8 | 39/64" | 1 1/16" | 1 | 1:1 | 0.125" | Class 2G | Not Rated | 000000000 | 00000 |
| 3/4"-5 | 47/64" | 1 1/4" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | 000000000 | 00000 |
| 3/4"-6 | 47/64" | 1 1/4" | 1 | 1:1 | 0.167" | Class 2G | Not Rated | 000000000 | 00000 |
| 3/4"-8 | 47/64" | 1 1/4" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B97 | 000000000 | 00000 |
| 7/8"-6 | 55/64" | 1 1/2" | 1 | 1:1 | 0.167" | Class 2G | Not Rated | 000000000 | 00000 |
| 1"-4 | 63/64" | 1 5/8" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B97 | 000000000 | 00000 |
| 1"-5 | 63/64" | 1 5/8" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | 000000000 | 00000 |
| 1"-6 | 63/64" | 1 5/8" | 1 | 1:1 | 0.167" | Class 2G | Not Rated | 000000000 | 00000 |