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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.
Carbon steel components are easier to machine than alloy steel components. Zinc-plated carbon steel components have mild corrosion resistance. 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. 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.
Coupling Nuts—Left-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 | |
Carbon Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/2"-10 | 1 1/4" | 5/8" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B75 | 000000000 | 000000 |
| 5/8"-8 | 2 1/8" | 7/8" | 1 | 1:1 | 0.125" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 3/4"-5 | 2 1/4" | 1" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 3/4"-6 | 2 1/4" | 1" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 7/8"-6 | 2 1/2" | 1 1/4" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1"-5 | 2 3/4" | 1 3/8" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1"-6 | 2 3/4" | 1 3/8" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1"-10 | 2 3/4" | 1 3/8" | 1 | 1:1 | 0.1" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1 1/8"-5 | 3" | 1 1/2" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1 1/4"-4 | 3" | 1 5/8" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1 1/4"-5 | 3" | 1 5/8" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1 3/8"-4 | 3 1/4" | 1 7/8" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 1 1/2"-4 | 3 1/2" | 2" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | 000000000 | 00000 |
| 2"-4 | 4" | 3" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | 000000000 | 000000 |
Flange Nuts—Left-Hand Threaded
Flange nuts move objects along the length of a lead screw. Flange nuts have a wide machinable flange for custom mounting.
Flange | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Ht. | Dia. | Dia. | Thick. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Each | |
932 Bearing Bronze | |||||||||||
| 1/2"-10 | 1" | 3/4" | 1 1/4" | 1/8" | 1 | 1:1 | 0.1" | Class 2G | Not Rated | 000000000 | 0000000 |
| 5/8"-8 | 1 1/4" | 7/8" | 1 1/2" | 1/4" | 1 | 1:1 | 0.125" | Class 2G | Not Rated | 000000000 | 000000 |
| 3/4"-5 | 1 1/2" | 1" | 2" | 3/8" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | 000000000 | 000000 |
| 3/4"-6 | 1 1/2" | 1" | 2" | 3/8" | 1 | 1:1 | 0.167" | Class 2G | Not Rated | 000000000 | 000000 |
| 7/8"-6 | 1 3/4" | 1 1/4" | 2 1/4" | 1/2" | 1 | 1:1 | 0.167" | Class 2G | Not Rated | 000000000 | 000000 |
| 1"-5 | 2" | 1 1/2" | 2 1/2" | 1/2" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | 000000000 | 000000 |
| 1"-6 | 2" | 1 1/2" | 2 1/2" | 1/2" | 1 | 1:1 | 0.167" | Class 2G | Not Rated | 000000000 | 000000 |
| 1 1/8"-5 | 2 1/4" | 1 3/4" | 2 3/4" | 5/8" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | 000000000 | 000000 |
| 1 1/4"-4 | 2 1/2" | 2" | 3" | 3/4" | 1 | 1:1 | 0.25" | Class 2G | Not Rated | 000000000 | 000000 |
| 1 1/4"-5 | 2 1/2" | 2" | 3" | 3/4" | 1 | 1:1 | 0.2" | Class 2G | Not Rated | 000000000 | 000000 |
| 1 1/2"-4 | 3" | 2 1/2" | 3 1/2" | 3/4" | 1 | 1:1 | 0.25" | Class 2G | Not Rated | 000000000 | 000000 |
| 2"-4 | 4" | 3" | 4" | 1" | 1 | 1:1 | 0.25" | Class 2G | Not Rated | 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 | 00000 |
| 3/4"-6 | 3/4" | 1 1/4" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 00000 |
| 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 |
932 Bearing Bronze | ||||||||||
| 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 |
| 1"-5 | 1 17/32" | 1 21/32" | 1 | 1:1 | 0.2" | 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 | 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 | Fastener Strength Grade/Class | Hardness | Specifications Met | Each | |
Carbon Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4"-16 | 15/64" | 1/2" | 1 | 1:1 | 0.063" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 00000 |
| 3/8"-8 | 23/64" | 11/16" | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 0000 |
| 3/8"-10 | 23/64" | 11/16" | 1 | 1:1 | 0.1" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 0000 |
| 3/8"-12 | 23/64" | 11/16" | 1 | 1:1 | 0.083" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 0000 |
| 1/2"-8 | 31/64" | 7/8" | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 0000 |
| 1/2"-10 | 31/64" | 7/8" | 1 | 1:1 | 0.1" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 0000 |
| 5/8"-6 | 39/64" | 1 1/16" | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 0000 |
| 5/8"-8 | 39/64" | 1 1/16" | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 0000 |
| 3/4"-5 | 47/64" | 1 1/4" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 0000 |
| 3/4"-6 | 47/64" | 1 1/4" | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 0000 |
| 3/4"-8 | 47/64" | 1 1/4" | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 0000 |
| 7/8"-6 | 55/64" | 1 7/16" | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 00000 |
| 1"-4 | 63/64" | 1 5/8" | 1 | 1:1 | 0.25" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 00000 |
| 1"-5 | 63/64" | 1 5/8" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 0000 |
| 1"-6 | 63/64" | 1 5/8" | 1 | 1:1 | 0.167" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 0000 |
| 1"-8 | 63/64" | 1 5/8" | 1 | 1:1 | 0.125" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 0000 |
| 1"-10 | 63/64" | 1 5/8" | 1 | 1:1 | 0.1" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 00000 |
| 1 1/8"-5 | 1 7/64" | 1 13/16" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 0000 |
| 1 1/4"-4 | 1 7/32" | 2" | 1 | 1:1 | 0.25" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 00000 |
| 1 1/4"-5 | 1 7/32" | 2" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 00000 |
| 1 3/8"-4 | 1 11/32" | 2 3/16" | 1 | 1:1 | 0.25" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 00000 |
| 1 1/2"-4 | 1 15/32" | 2 3/8" | 1 | 1:1 | 0.25" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 00000 |
| 1 1/2"-5 | 1 1/2" | 2 3/8" | 1 | 1:1 | 0.2" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 00000 |
| 2"-4 | 2" | 3" | 1 | 1:1 | 0.25" | Class 2G | Grade 2 | Rockwell B85 | __ | 000000000 | 00000 |
Zinc-Plated Carbon Steel | |||||||||||
| 1/2"-10 | 1/2" | 7/8" | 1 | 1:1 | 0.1" | Class 2G | __ | Rockwell B75 | __ | 000000000 | 00000 |
| 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 |
360 Brass | |||||||||||
| 1/2"-10 | 1/2" | 7/8" | 1 | 1:1 | 0.1" | Class 2G | __ | Rockwell B75 | ASTM B16 | 000000000 | 0000 |
| 5/8"-8 | 5/8" | 1" | 1 | 1:1 | 0.125" | Class 2G | __ | Rockwell B75 | ASTM B16 | 000000000 | 00000 |
| 3/4"-5 | 3/4" | 1 1/4" | 1 | 1:1 | 0.2" | Class 2G | __ | Rockwell B75 | ASTM B16 | 000000000 | 00000 |
| 3/4"-6 | 3/4" | 1 1/4" | 1 | 1:1 | 0.167" | Class 2G | __ | Rockwell B75 | ASTM B16 | 000000000 | 00000 |
| 7/8"-6 | 7/8" | 1 1/2" | 1 | 1:1 | 0.167" | Class 2G | __ | Rockwell B75 | ASTM B16 | 000000000 | 00000 |
| 1"-5 | 1" | 1 5/8" | 1 | 1:1 | 0.2" | Class 2G | __ | Rockwell B75 | ASTM B16 | 000000000 | 00000 |
| 1"-6 | 1" | 1 5/8" | 1 | 1:1 | 0.167" | Class 2G | __ | Rockwell B75 | ASTM B16 | 000000000 | 00000 |
| 1"-10 | 1" | 1 5/8" | 1 | 1:1 | 0.1" | Class 2G | __ | Rockwell B75 | ASTM B16 | 000000000 | 00000 |
| 1 1/8"-5 | 1 1/8" | 1 3/4" | 1 | 1:1 | 0.2" | Class 2G | __ | Rockwell B75 | ASTM B16 | 000000000 | 00000 |
| 1 1/4"-5 | 1 1/4" | 2" | 1 | 1:1 | 0.2" | Class 2G | __ | Rockwell B75 | ASTM B16 | 000000000 | 00000 |
| 1 1/2"-4 | 1 1/2" | 2 1/4" | 1 | 1:1 | 0.25" | Class 2G | __ | Rockwell B75 | ASTM B16 | 000000000 | 00000 |
| 2"-4 | 2" | 3" | 1 | 1:1 | 0.25" | Class 2G | __ | Rockwell B75 | ASTM B16 | 000000000 | 000000 |
18-8 Stainless Steel | |||||||||||
| 1/4"-16 | 15/64" | 1/2" | 1 | 1:1 | 0.063" | Class 2G | __ | Rockwell B97 | __ | 000000000 | 00000 |
| 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 |
Square Nuts—Left-Hand Threaded
Square nuts fasten and position lead screw components. Square nuts have large sides, which make them easier to grip with a wrench than hex nuts and keep them from rotating in channels and square holes.
| Thread Size | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Specifications Met | Each | |
360 Brass | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 3/8"-12 | 3/8" | 3/4" | 1 | 1:1 | 0.083" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 00000 |
| 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 | 00000 |
| 3/4"-5 | 3/4" | 1 1/4" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 00000 |
| 3/4"-6 | 3/4" | 1 1/4" | 1 | 1:1 | 0.167" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 00000 |
| 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 1/4" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 00000 |
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 and size.
Cast iron nuts have good machinability and high strength. 360 brass nuts have excellent machinability and good corrosion resistance. 932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance. PET plastic nuts are lightweight and corrosion resistant.
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.
Platform Nuts—Left-Hand Threaded
Platform nuts have wide, machinable surfaces for custom mounting.
| Thread Size | Lg. | Wd. | Ht. | Center Ht. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Dynamic Thrust Load Cap., lbs. | Each | |
932 Bearing Bronze | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2"-10 | 1 3/4" | 2" | 1 1/8" | 5/8" | 1 | 1:1 | 0.1" | Class 2C | Brinell 65 | 1,200 | 0000000 | 0000000 |
| 3/4"-5 | 2 1/4" | 2 5/8" | 1 5/8" | 15/16" | 1 | 1:1 | 0.2" | Class 2C | Brinell 65 | 2,800 | 0000000 | 000000 |
| 3/4"-6 | 2 1/4" | 2 5/8" | 1 5/8" | 15/16" | 1 | 1:1 | 0.167" | Class 2C | Brinell 65 | 2,800 | 0000000 | 000000 |
| 3/4"-10 | 2 1/4" | 2 5/8" | 1 5/8" | 15/16" | 1 | 1:1 | 0.1" | Class 2C | Brinell 65 | 2,800 | 0000000 | 000000 |
| 1"-4 | 3" | 3" | 1 15/16" | 1 1/8" | 1 | 1:1 | 0.25" | Class 2C | Brinell 65 | 5,000 | 0000000 | 000000 |
| 1"-5 | 3" | 3" | 1 15/16" | 1 1/8" | 1 | 1:1 | 0.2" | Class 2C | Brinell 65 | 5,000 | 0000000 | 000000 |
| 1"-6 | 3" | 3" | 1 15/16" | 1 1/8" | 1 | 1:1 | 0.167" | Class 2C | Brinell 65 | 5,000 | 0000000 | 000000 |
| 1"-10 | 3" | 3" | 1 15/16" | 1 1/8" | 1 | 1:1 | 0.1" | Class 2C | Brinell 65 | 5,000 | 0000000 | 000000 |
| 1 1/2"-4 | 4 1/2" | 3 5/8" | 2 9/16" | 1 1/2" | 1 | 1:1 | 0.25" | Class 2C | Brinell 65 | 11,000 | 0000000 | 000000 |
Round Nuts—Left-Hand Threaded
| Thread Size | Lg. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Dynamic Thrust Load Cap., lbs. | Temperature Range, °F | 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 | 000000 |
| 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 |
932 Bearing Bronze | |||||||||||
| 3/8"-8 | 3/4" | 1.344" | 1 | 1:1 | 0.125" | Class 2C | Brinell 65 | 700 | __ | 00000000 | 00000 |
| 3/8"-10 | 3/4" | 1.344" | 1 | 1:1 | 0.1" | Class 2C | Brinell 65 | 700 | __ | 00000000 | 00000 |
| 3/8"-12 | 3/4" | 1.344" | 1 | 1:1 | 0.083" | Class 2C | Brinell 65 | 700 | __ | 00000000 | 00000 |
| 1/2"-10 | 1" | 1.469" | 1 | 1:1 | 0.1" | Class 2C | Brinell 65 | 1,300 | __ | 00000000 | 00000 |
| 5/8"-8 | 1 1/4" | 1.859" | 1 | 1:1 | 0.125" | Class 2C | Brinell 65 | 2,000 | __ | 00000000 | 00000 |
| 5/8"-10 | 1 1/4" | 1.859" | 1 | 1:1 | 0.1" | Class 2C | Brinell 65 | 2,000 | __ | 00000000 | 00000 |
| 3/4"-5 | 1 1/2" | 2.234" | 1 | 1:1 | 0.2" | Class 2C | Brinell 65 | 2,900 | __ | 00000000 | 000000 |
| 3/4"-6 | 1 1/2" | 2.234" | 1 | 1:1 | 0.167" | Class 2C | Brinell 65 | 2,900 | __ | 00000000 | 000000 |
| 3/4"-10 | 1 1/2" | 2.234" | 1 | 1:1 | 0.1" | Class 2C | Brinell 65 | 2,900 | __ | 00000000 | 000000 |
| 1"-4 | 2" | 2.984" | 1 | 1:1 | 0.25" | Class 2C | Brinell 65 | 5,000 | __ | 00000000 | 000000 |
| 1"-5 | 2" | 2.984" | 1 | 1:1 | 0.2" | Class 2C | Brinell 65 | 5,000 | __ | 00000000 | 000000 |
| 1"-6 | 2" | 2.984" | 1 | 1:1 | 0.167" | Class 2C | Brinell 65 | 5,000 | __ | 00000000 | 000000 |
| 1"-10 | 2" | 2.984" | 1 | 1:1 | 0.1" | Class 2C | Brinell 65 | 5,000 | __ | 00000000 | 000000 |
| 1 1/4"-4 | 2 1/2" | 3.734" | 1 | 1:1 | 0.25" | Class 2C | Brinell 65 | 7,850 | __ | 00000000 | 000000 |
| 1 1/4"-5 | 2 1/2" | 3.734" | 1 | 1:1 | 0.2" | Class 2C | Brinell 65 | 7,850 | __ | 00000000 | 000000 |
| 1 1/2"-4 | 3" | 4.469" | 1 | 1:1 | 0.25" | Class 2C | Brinell 65 | 12,000 | __ | 00000000 | 000000 |
PET Plastic | |||||||||||
| 3/8"-8 | 3/4" | 1.344" | 1 | 1:1 | 0.125" | Class 2C | Not Rated | 350 | 15° to 175° | 00000000 | 00000 |
| 3/8"-10 | 3/4" | 1.344" | 1 | 1:1 | 0.1" | Class 2C | Not Rated | 350 | 15° to 175° | 00000000 | 00000 |
| 3/8"-12 | 3/4" | 1.344" | 1 | 1:1 | 0.083" | Class 2C | Not Rated | 350 | 15° to 175° | 00000000 | 00000 |
| 1/2"-10 | 1" | 1.469" | 1 | 1:1 | 0.1" | Class 2C | Not Rated | 650 | 15° to 175° | 00000000 | 00000 |
| 5/8"-8 | 1 1/4" | 1.859" | 1 | 1:1 | 0.125" | Class 2C | Not Rated | 1,000 | 15° to 175° | 00000000 | 00000 |
| 5/8"-10 | 1 1/4" | 1.859" | 1 | 1:1 | 0.1" | Class 2C | Not Rated | 1,000 | 15° to 175° | 00000000 | 00000 |
| 3/4"-5 | 1 1/2" | 2.234" | 1 | 1:1 | 0.2" | Class 2C | Not Rated | 1,450 | 15° to 175° | 00000000 | 000000 |
| 3/4"-6 | 1 1/2" | 2.234" | 1 | 1:1 | 0.167" | Class 2C | Not Rated | 1,450 | 15° to 175° | 00000000 | 000000 |
| 3/4"-10 | 1 1/2" | 2.234" | 1 | 1:1 | 0.1" | Class 2C | Not Rated | 1,450 | 15° to 175° | 00000000 | 000000 |
Externally Threaded Nuts—Left-Hand Threaded
Combine externally threaded nuts with a flange to create a custom flange nut.
External Thread | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Size | Lg. | Thread Fit | Hardness | Dynamic Thrust Load Cap., lbs. | Each | |
360 Brass | ||||||||||||
| 3/4"-8 | 1 1/4" | 1.125" | 1 | 1:1 | 0.125" | 1"-18 | 1/2" | Class 2C | Brinell 70 | 2,800 | 000000000 | 000000 |
| 3/4"-16 | 1 1/4" | 1.125" | 1 | 1:1 | 0.063" | 1"-18 | 1/2" | Class 2C | Brinell 70 | 2,800 | 000000000 | 00000 |
| 1"-8 | 1 1/2" | 1.5" | 1 | 1:1 | 0.125" | 1 3/8"-16 | 1/2" | Class 2C | Brinell 70 | 5,000 | 000000000 | 00000 |
| 1 1/2"-10 | 2 19/64" | 2.125" | 1 | 1:1 | 0.1" | 1 31/32"-18 | 13/16" | Class 2C | Brinell 70 | 11,250 | 000000000 | 000000 |
673 Bronze | ||||||||||||
| 1/4"-16 | 5/8" | 0.688" | 1 | 1:1 | 0.063" | 9/16"-18 | 3/8" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 3/8"-12 | 5/8" | 0.688" | 1 | 1:1 | 0.083" | 9/16"-18 | 3/8" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 1/2"-10 | 3/4" | 1.125" | 1 | 1:1 | 0.1" | 15/16"-16 | 1/2" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 5/8"-5 | 1" | 1.125" | 1 | 1:1 | 0.2" | 15/16"-16 | 1/2" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 5/8"-8 | 1" | 1.125" | 1 | 1:1 | 0.125" | 15/16"-16 | 1/2" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 5/8"-10 | 1" | 1.125" | 1 | 1:1 | 0.1" | 15/16"-16 | 1/2" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 3/4"-5 | 1 1/4" | 1.125" | 1 | 1:1 | 0.2" | 1"-18 | 1/2" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 3/4"-6 | 1 1/4" | 1.125" | 1 | 1:1 | 0.167" | 1"-18 | 1/2" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 3/4"-10 | 1 1/4" | 1.125" | 1 | 1:1 | 0.1" | 1"-18 | 1/2" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 1"-4 | 1 1/2" | 1.5" | 1 | 1:1 | 0.25" | 1 3/8"-16 | 1/2" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 1"-5 | 1 1/2" | 1.5" | 1 | 1:1 | 0.2" | 1 3/8"-16 | 1/2" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 1"-6 | 1 1/2" | 1.5" | 1 | 1:1 | 0.167" | 1 3/8"-16 | 1/2" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 1"-10 | 1 1/2" | 1.5" | 1 | 1:1 | 0.1" | 1 3/8"-16 | 1/2" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 1 1/4"-4 | 1 3/4" | 2.125" | 1 | 1:1 | 0.25" | 1 31/32"-18 | 13/16" | Class 2C | Brinell 70 | Not Rated | 000000000 | 000000 |
| 1 1/4"-5 | 1 3/4" | 2.125" | 1 | 1:1 | 0.2" | 1 31/32"-18 | 13/16" | Class 2C | Brinell 70 | Not Rated | 000000000 | 000000 |
| 1 1/2"-4 | 2 19/64" | 2.125" | 1 | 1:1 | 0.25" | 1 31/32"-18 | 13/16" | Class 2C | Brinell 70 | Not Rated | 000000000 | 000000 |
| 1 1/2"-5 | 2 19/64" | 2.125" | 1 | 1:1 | 0.2" | 1 31/32"-18 | 13/16" | Class 2C | Brinell 70 | Not Rated | 000000000 | 000000 |
| 2"-4 | 2 3/4" | 2.75" | 1 | 1:1 | 0.25" | 2 35/64"-18 | 7/8" | Class 2C | Brinell 70 | Not Rated | 000000000 | 000000 |
Flanges
Thread onto an externally threaded acme nut to create a custom flange nut.
| Flange Thread Size | Flange Dia. | Flange Thick. | Bolt Circle Dia. | Flange Hardness | Each | |
1117 Carbon Steel | ||||||
|---|---|---|---|---|---|---|
| 1 3/8"-16 | 2 49/64" | 33/64" | 2 17/64" | Brinell 156 | 000000000 | 000000 |
| 1 31/32"-18 | 4 13/64" | 53/64" | 3 7/16" | Brinell 156 | 000000000 | 00000 |
| 2 35/64"-18 | 4 15/16" | 29/32" | 4 1/16" | Brinell 156 | 000000000 | 00000 |
1215 Carbon Steel | ||||||
| 9/16"-18 | 1 39/64" | 13/32" | 1 1/8" | Not Rated | 000000000 | 00000 |
| 15/16"-16 | 2 5/8" | 17/32" | 2 3/32" | Not Rated | 000000000 | 00000 |
| 1"-18 | 2 5/8" | 17/32" | 2 3/32" | Not Rated | 000000000 | 00000 |
303 Stainless Steel | ||||||
| 9/16"-18 | 1 39/64" | 13/32" | 1 1/8" | Brinell 140 | 0000000 | 00000 |
| 15/16"-16 | 2 5/8" | 17/32" | 2 3/32" | Brinell 140 | 0000000 | 00000 |
| 1"-18 | 2 5/8" | 17/32" | 2 3/32" | Brinell 140 | 0000000 | 00000 |
| 1 3/8"-16 | 2 49/64" | 33/64" | 2 17/64" | Brinell 140 | 0000000 | 00000 |
| 1 31/32"-18 | 4 13/64" | 53/64" | 3 7/16" | Brinell 140 | 0000000 | 000000 |
| 2 35/64"-18 | 4 15/16" | 29/32" | 4 1/16" | Brinell 140 | 0000000 | 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.
360 brass nuts have excellent machinability and good corrosion resistance. 932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance.
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.
Round Nuts—Left-Hand Threaded
| Thread Size | Lg. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Dynamic Thrust Load Cap., lbs. | Each | |
932 Bearing Bronze | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1/4"-12 | 3/4" | 1.344" | 4 | 4:1 | 0.333" | Class 2C | Brinell 65 | 320 | 00000000 | 000000 |
| 3/8"-8 | 3/4" | 1.344" | 2 | 2:1 | 0.25" | Class 2C | Brinell 65 | 700 | 00000000 | 00000 |
| 3/8"-8 | 3/4" | 1.344" | 4 | 4:1 | 0.5" | Class 2C | Brinell 65 | 700 | 00000000 | 00000 |
| 3/8"-10 | 3/4" | 1.344" | 2 | 2:1 | 0.2" | Class 2C | Brinell 65 | 700 | 00000000 | 00000 |
| 1/2"-10 | 1" | 1.469" | 5 | 5:1 | 0.5" | Class 2C | Brinell 65 | 1,300 | 00000000 | 00000 |
Externally Threaded Nuts—Left-Hand Threaded
Combine externally threaded nuts with a flange to create a custom flange nut.
External Thread | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Size | Lg. | Thread Fit | Hardness | Dynamic Thrust Load Cap., lbs. | Each | |
360 Brass | ||||||||||||
| 5/8"-8 | 1" | 1.125" | 2 | 2:1 | 0.25" | 15/16"-16 | 1/2" | Class 2C | Brinell 70 | 1,900 | 000000000 | 000000 |
| 3/4"-8 | 1 1/4" | 1.125" | 2 | 2:1 | 0.25" | 1"-18 | 1/2" | Class 2C | Brinell 70 | 2,800 | 000000000 | 00000 |
| 1"-4 | 1 1/2" | 1.5" | 2 | 2:1 | 0.5" | 1 3/8"-16 | 1/2" | Class 2C | Brinell 70 | 5,000 | 000000000 | 00000 |
| 1"-6 | 1 1/2" | 1.5" | 2 | 2:1 | 0.333" | 1 3/8"-16 | 1/2" | Class 2C | Brinell 70 | 5,000 | 000000000 | 00000 |
673 Bronze | ||||||||||||
| 3/8"-12 | 5/8" | 0.688" | 2 | 2:1 | 0.167" | 9/16"-18 | 3/8" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 3/4"-6 | 1 1/4" | 1.125" | 2 | 2:1 | 0.333" | 1"-18 | 1/2" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 1"-10 | 1 1/2" | 1.5" | 10 | 10:1 | 1" | 1 3/8"-16 | 1/2" | Class 2C | Brinell 70 | Not Rated | 000000000 | 00000 |
| 1 1/2"-4 | 2 19/64" | 2.125" | 2 | 2:1 | 0.5" | 1 31/32"-18 | 13/16" | Class 2C | Brinell 70 | Not Rated | 000000000 | 000000 |
Flanges
Thread onto an externally threaded acme nut to create a custom flange nut.
| Flange Thread Size | Flange Dia. | Flange Thick. | Bolt Circle Dia. | Flange Hardness | Each | |
1117 Carbon Steel | ||||||
|---|---|---|---|---|---|---|
| 1 3/8"-16 | 2 49/64" | 33/64" | 2 17/64" | Brinell 156 | 000000000 | 000000 |
| 1 31/32"-18 | 4 13/64" | 53/64" | 3 7/16" | Brinell 156 | 000000000 | 00000 |
1215 Carbon Steel | ||||||
| 9/16"-18 | 1 39/64" | 13/32" | 1 1/8" | Not Rated | 000000000 | 00000 |
| 15/16"-16 | 2 5/8" | 17/32" | 2 3/32" | Not Rated | 000000000 | 00000 |
| 1"-18 | 2 5/8" | 17/32" | 2 3/32" | Not Rated | 000000000 | 00000 |
303 Stainless Steel | ||||||
| 9/16"-18 | 1 39/64" | 13/32" | 1 1/8" | Brinell 140 | 0000000 | 00000 |
| 15/16"-16 | 2 5/8" | 17/32" | 2 3/32" | Brinell 140 | 0000000 | 00000 |
| 1"-18 | 2 5/8" | 17/32" | 2 3/32" | Brinell 140 | 0000000 | 00000 |
| 1 3/8"-16 | 2 49/64" | 33/64" | 2 17/64" | Brinell 140 | 0000000 | 00000 |
| 1 31/32"-18 | 4 13/64" | 53/64" | 3 7/16" | Brinell 140 | 0000000 | 000000 |
Flanges for Precision Acme Nuts
Thread onto an externally threaded acme nut to create a custom flange nut.
For technical drawings and 3-D models, click on a part number.
| Flange Thread Size | Flange Dia. | Flange Thick. | Bolt Circle Dia. | Flange Hardness | Each | |
1117 Carbon Steel | ||||||
|---|---|---|---|---|---|---|
| 1 3/8"-16 | 2 49/64" | 33/64" | 2 17/64" | Brinell 156 | 000000000 | 000000 |
| 1 31/32"-18 | 4 13/64" | 53/64" | 3 7/16" | Brinell 156 | 000000000 | 00000 |
| 2 35/64"-18 | 4 15/16" | 29/32" | 4 1/16" | Brinell 156 | 000000000 | 00000 |
| 3 9/64"-12 | 5 3/8" | 1 37/64" | 4 3/8" | Brinell 156 | 000000000 | 000000 |
1215 Carbon Steel | ||||||
| 9/16"-18 | 1 39/64" | 13/32" | 1 1/8" | Not Rated | 000000000 | 00000 |
| 15/16"-16 | 2 5/8" | 17/32" | 2 3/32" | Not Rated | 000000000 | 00000 |
| 1"-18 | 2 5/8" | 17/32" | 2 3/32" | Not Rated | 000000000 | 00000 |
303 Stainless Steel | ||||||
| 9/16"-18 | 1 39/64" | 13/32" | 1 1/8" | Brinell 140 | 0000000 | 00000 |
| 15/16"-16 | 2 5/8" | 17/32" | 2 3/32" | Brinell 140 | 0000000 | 00000 |
| 1"-18 | 2 5/8" | 17/32" | 2 3/32" | Brinell 140 | 0000000 | 00000 |
| 1 3/8"-16 | 2 49/64" | 33/64" | 2 17/64" | Brinell 140 | 0000000 | 00000 |
| 1 31/32"-18 | 4 13/64" | 53/64" | 3 7/16" | Brinell 140 | 0000000 | 000000 |
| 2 35/64"-18 | 4 15/16" | 29/32" | 4 1/16" | Brinell 140 | 0000000 | 000000 |
Clamping Acme Lead Screw Collars
Thread these one-piece collars onto an Acme lead screw to separate and position components, or use them as an end stop to limit travel. Tighten the clamping screw to secure.
To ensure compatibility, please select a collar that has the same thread type, direction, and size as your lead screw.
Black-oxide carbon steel collars have mild corrosion resistance.
For technical drawings and 3-D models, click on a part number.