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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 and size.
Cast iron components have good machinability and high strength. 360 brass components have excellent machinability and good corrosion resistance. 932 bearing bronze components are more wear resistant than brass components. They have good machinability and fair 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.
Round Nuts—Right-Hand Threaded
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 | Specifications Met | 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 |
360 Brass | ||||||||||
| 3/8"-12 | 3/8" | 3/4" | 1 | 1:1 | 0.083" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 0000 |
| 1/2"-10 | 1/2" | 7/8" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 0000 |
| 5/8"-8 | 5/8" | 1" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 0000 |
| 3/4"-5 | 3/4" | 1 1/4" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 0000 |
| 3/4"-6 | 3/4" | 1 1/4" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 0000 |
| 7/8"-6 | 7/8" | 1 1/2" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 00000 |
| 1"-5 | 1" | 1 5/8" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 00000 |
| 1"-6 | 1" | 1 5/8" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 00000 |
| 1"-10 | 1" | 1 5/8" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 00000 |
| 1 1/4"-5 | 1 1/4" | 2" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 00000 |
| 1 1/2"-4 | 1 1/2" | 2 1/2" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 00000 |
932 Bearing Bronze | ||||||||||
| 1/4"-16 | 17/32" | 25/32" | 1 | 1:1 | 0.063" | Class 2G | Not Rated | ASTM B505 | 000000000 | 00000 |
| 3/8"-12 | 3/4" | 7/8" | 1 | 1:1 | 0.083" | Class 2G | Not Rated | ASTM B505 | 000000000 | 00000 |
| 1/2"-10 | 29/32" | 29/32" | 1 | 1:1 | 0.1" | Class 2G | Not Rated | ASTM B505 | 000000000 | 00000 |
| 5/8"-8 | 1 1/32" | 1 9/32" | 1 | 1:1 | 0.125" | Class 2G | Not Rated | ASTM B505 | 000000000 | 00000 |
| 3/4"-5 | 1 9/32" | 1 13/32" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | ASTM B505 | 000000000 | 00000 |
| 3/4"-6 | 1 17/64" | 1 13/32" | 1 | 1:1 | 0.167" | Class 2G | Not Rated | ASTM B505 | 000000000 | 00000 |
| 7/8"-6 | 1 17/32" | 1 21/32" | 1 | 1:1 | 0.167" | Class 2G | Not Rated | ASTM B505 | 000000000 | 00000 |
| 1"-4 | 1 17/32" | 1 21/32" | 1 | 1:1 | 0.25" | Class 2G | Not Rated | ASTM B505 | 000000000 | 00000 |
| 1"-5 | 1 17/32" | 1 21/32" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | ASTM B505 | 000000000 | 00000 |
| 1"-6 | 1 17/32" | 1 21/32" | 1 | 1:1 | 0.167" | Class 2G | Not Rated | ASTM B505 | 000000000 | 00000 |
| 1"-10 | 1 17/32" | 1 21/32" | 1 | 1:1 | 0.1" | Class 2G | Not Rated | ASTM B505 | 000000000 | 00000 |
| 1 1/4"-4 | 2 1/64" | 2 5/32" | 1 | 1:1 | 0.25" | Class 2G | Not Rated | ASTM B505 | 000000000 | 00000 |
| 1 1/4"-5 | 2 1/64" | 2 5/32" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | ASTM B505 | 000000000 | 00000 |
| 1 1/2"-4 | 3" | 2 25/32" | 1 | 1:1 | 0.25" | Class 2G | Not Rated | ASTM B505 | 000000000 | 000000 |
| 2"-4 | 4 1/64" | 3 9/32" | 1 | 1:1 | 0.25" | Class 2G | Not Rated | ASTM B505 | 000000000 | 000000 |
Round Nuts—Left-Hand Threaded
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 | Specifications Met | 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 |
360 Brass | ||||||||||
| 1/2"-10 | 1/2" | 7/8" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 0000 |
| 5/8"-8 | 5/8" | 1" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 0000 |
| 3/4"-5 | 3/4" | 1 1/4" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 0000 |
| 3/4"-6 | 3/4" | 1 1/4" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 0000 |
| 7/8"-6 | 7/8" | 1 1/2" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 00000 |
| 1"-5 | 1" | 1 5/8" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 00000 |
| 1"-6 | 1" | 1 5/8" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 00000 |
| 1"-10 | 1" | 1 5/8" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 00000 |