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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.
Carbon steel components are easier to machine than alloy steel components. Zinc-plated carbon steel components have mild 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 | Fastener Strength Grade/Class | Hardness | Tensile Strength, psi | Specifications Met | Each | |
Zinc-Plated Carbon Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 3/8"-8 | 12" | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 000000 |
| 3/8"-8 | 3 ft. | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 3/8"-8 | 6 ft. | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 1/2"-10 | 6" | 1 | 1:1 | 0.1" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 00000 |
| 1/2"-10 | 12" | 1 | 1:1 | 0.1" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 1/2"-10 | 3 ft. | 1 | 1:1 | 0.1" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 1/2"-10 | 6 ft. | 1 | 1:1 | 0.1" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 5/8"-8 | 6" | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 00000 |
| 5/8"-8 | 12" | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 5/8"-8 | 3 ft. | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 5/8"-8 | 6 ft. | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 3/4"-5 | 6" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 00000 |
| 3/4"-5 | 12" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 3/4"-5 | 18" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 00000 |
| 3/4"-5 | 3 ft. | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 3/4"-5 | 6 ft. | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 3/4"-6 | 6" | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 00000 |
| 3/4"-6 | 12" | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 3/4"-6 | 16" | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 00000 |
| 3/4"-6 | 18" | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 00000 |
| 3/4"-6 | 3 ft. | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 3/4"-6 | 6 ft. | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 1"-5 | 6" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 00000 |
| 1"-5 | 10" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 00000 |
| 1"-5 | 12" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | 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"-5 | 3 ft. | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 1"-5 | 6 ft. | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 1"-6 | 12" | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 1"-6 | 3 ft. | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 1"-6 | 6 ft. | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 1 1/4"-5 | 6" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 00000 |
| 1 1/4"-5 | 12" | 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 1/4"-5 | 3 ft. | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 00000 |
| 1 1/4"-5 | 6 ft. | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 000000 |
| 1 1/2"-4 | 6" | 1 | 1:1 | 0.25" | Class 2G | Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 000000000 | 00000 |
| 1 1/2"-4 | 12" | 1 | 1:1 | 0.25" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | 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 |
| 1 1/2"-4 | 3 ft. | 1 | 1:1 | 0.25" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 000000000 | 000000 |
| 1 1/2"-4 | 6 ft. | 1 | 1:1 | 0.25" | Class 2G | Grade 2 | Rockwell B61 | 68,000 | ASTM A108 | 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 | |
Zinc-Plated Carbon Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/4"-16 | 15/64" | 1/2" | 1 | 1:1 | 0.063" | Class 2G | Rockwell B75 | 000000000 | 000000 |
| 3/8"-8 | 23/64" | 11/16" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 3/8"-10 | 23/64" | 11/16" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 3/8"-12 | 23/64" | 11/16" | 1 | 1:1 | 0.083" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1/2"-8 | 31/64" | 7/8" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1/2"-10 | 1/2" | 7/8" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 5/8"-6 | 39/64" | 1 1/16" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 5/8"-8 | 5/8" | 1 1/16" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 3/4"-5 | 47/64" | 1 1/4" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 3/4"-6 | 3/4" | 1 1/4" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 3/4"-8 | 47/64" | 1 1/4" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 7/8"-6 | 55/64" | 1 7/16" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1"-4 | 63/64" | 1 5/8" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1"-5 | 1" | 1 5/8" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1"-6 | 63/64" | 1 5/8" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1"-8 | 63/64" | 1 5/8" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1"-10 | 63/64" | 1 5/8" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1 1/8"-5 | 1 7/64" | 1 13/16" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1 1/4"-4 | 1 7/32" | 2" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1 1/4"-5 | 1 1/4" | 2" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1 3/8"-4 | 1 11/32" | 2 3/16" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1 1/2"-4 | 1 15/32" | 2 3/8" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1 1/2"-5 | 1 15/32" | 2 3/8" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 2"-4 | 1 31/32" | 3" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | 000000000 | 000000 |
| 2 1/4"-4 | 2 1/2" | 3 1/2" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | 000000000 | 000000 |
| 2 1/2"-4 | 2 1/2" | 3 1/2" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | 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 | |
Zinc-Plated Carbon Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/2"-10 | 1/2" | 7/8" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B75 | 000000000 | 000000 |
| 5/8"-8 | 5/8" | 1" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 3/4"-6 | 3/4" | 1 1/4" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1"-5 | 1" | 1 5/8" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1 1/4"-5 | 1 1/4" | 2" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B75 | 000000000 | 00000 |