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.
Hex nuts fasten and position lead screw components.
| Thread Size  | Thread Type | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Each | |
Carbon Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 1/4"-4 | Acme | 1 1/4" | 2" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | 000000000 | 000000 |
| 1 1/4"-5 | Acme | 1 7/32" | 2" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 2"-4 | Acme | 1 31/32" | 3" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | 000000000 | 00000 |
Zinc-Plated Carbon Steel | ||||||||||
| 1 1/4"-4 | Acme | 1 7/32" | 2" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1 1/4"-5 | Acme | 1 1/4" | 2" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 2"-4 | Acme | 1 31/32" | 3" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | 000000000 | 000000 |
Hex nuts fasten and position lead screw components.
| Thread Size | Thread Type | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Fastener Strength Grade/Class | Hardness | Each | |
Carbon Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4"-16 | Stub Acme | 15/64" | 1/2" | 1 | 1:1 | 0.063" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 00000 |
| 3/8"-8 | Stub Acme | 23/64" | 11/16" | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 0000 |
| 3/8"-10 | Acme | 23/64" | 11/16" | 1 | 1:1 | 0.1" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 0000 |
| 3/8"-12 | Acme | 23/64" | 11/16" | 1 | 1:1 | 0.083" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 0000 |
| 1/2"-8 | Acme | 31/64" | 7/8" | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 0000 |
| 1/2"-10 | Acme | 31/64" | 7/8" | 1 | 1:1 | 0.1" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 0000 |
| 5/8"-6 | Acme | 39/64" | 1 1/16" | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 0000 |
| 5/8"-8 | Acme | 39/64" | 1 1/16" | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 0000 |
| 3/4"-5 | Acme | 47/64" | 1 1/4" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 0000 |
| 3/4"-6 | Acme | 47/64" | 1 1/4" | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 0000 |
| 3/4"-8 | Acme | 47/64" | 1 1/4" | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 0000 |
| 7/8"-6 | Acme | 55/64" | 1 7/16" | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 00000 |
| 1"-4 | Acme | 63/64" | 1 5/8" | 1 | 1:1 | 0.25" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 00000 |
| 1"-5 | Acme | 63/64" | 1 5/8" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 0000 |
| 1"-6 | Acme | 63/64" | 1 5/8" | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 0000 |
| 1"-8 | Acme | 63/64" | 1 5/8" | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 00000 |
| 1"-10 | Acme | 63/64" | 1 5/8" | 1 | 1:1 | 0.1" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 0000 |
| 1 1/8"-5 | Acme | 1 7/64" | 1 13/16" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 00000 |
| 1 1/4"-4 | Acme | 1 7/32" | 2" | 1 | 1:1 | 0.25" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 00000 |
| 1 1/4"-5 | Acme | 1 7/32" | 2" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 00000 |
| 1 3/8"-4 | Acme | 1 11/32" | 2 3/16" | 1 | 1:1 | 0.25" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 00000 |
| 1 1/2"-4 | Acme | 1 15/32" | 2 3/8" | 1 | 1:1 | 0.25" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 00000 |
| 1 1/2"-5 | Acme | 1 1/2" | 2 3/8" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 00000 |
| 2"-4 | Acme | 2" | 3" | 1 | 1:1 | 0.25" | Class 2G | Grade 2 | Rockwell B85 | 000000000 | 00000 |
Zinc-Plated Carbon Steel | |||||||||||
| 1 1/4"-5 | Acme | 1 1/4" | 2" | 1 | 1:1 | 0.2" | Class 2G | __ | Rockwell B75 | 000000000 | 00000 |
Metric 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, size, pitch, and number of thread starts. Class 7e and 7H components are compatible.
Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
Hex nuts fasten and position lead screw components.
| Thread Size | Thread Pitch, mm | Ht., mm | Wd., mm | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Thread Fit | Fastener Strength Grade/Class | Hardness | Each | |
Carbon Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| M12 | 3 | 12 | 22.2 | 1 | 1:1 | 3 | 7H | Grade 2 | Not Rated | 000000000 | 000000 |
| M16 | 4 | 16 | 27 | 1 | 1:1 | 4 | 7H | Grade 2 | Not Rated | 000000000 | 00000 |
| M20 | 4 | 20 | 31.75 | 1 | 1:1 | 4 | 7H | Grade 2 | Not Rated | 000000000 | 00000 |
| M26 | 5 | 25.4 | 41.3 | 1 | 1:1 | 5 | 7H | Grade 2 | Not Rated | 000000000 | 00000 |
| M40 | 7 | 39.9 | 60.33 | 1 | 1:1 | 7 | 7H | Grade 2 | Not Rated | 000000000 | 00000 |