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About Nuts, Materials, and Finishes
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Selecting Compatible Lead Screws and Nuts
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Plastic Coupling Nuts
These nylon 6/6 coupling nuts are chemical resistant, nonconductive, and lightweight. Also known as extension nuts, use them to connect and extend threaded rods.
For technical drawings and 3-D models, click on a part number.
Temperature Range, °F | Each | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | Threading | Min. Thread Lg. | Min. | Max. | Color | 1-9 | 10-Up | |
Nylon 6/6 Plastic | ||||||||||
| 10-32 | 1 3/4" | 5/8" | Partially Threaded | 1/2" | Not Rated | 250° | Off-White | 0000000 | 000000 | 000000 |
Stainless Steel Extra-Long Coupling Nuts
These coupling nuts have good chemical resistance. Also known as sleeve nuts, they're at least twice the length of standard coupling nuts to provide more room to connect and extend long lengths of threaded rods.
For technical drawings and 3-D models, click on a part number.
Each | |||||||
|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | Threading | Min. Thread Lg. | 1-9 | 10-Up | |
18-8 Stainless Steel | |||||||
| 0-80 | 5/8" | 1/4" | Partially Threaded | 3/16" | 000000000 | 00000 | 00000 |
| 0-80 | 11/16" | 1/4" | Partially Threaded | 3/16" | 000000000 | 0000 | 0000 |
| 2-56 | 5/8" | 1/4" | Partially Threaded | 3/16" | 000000000 | 0000 | 0000 |
| 2-56 | 11/16" | 1/4" | Partially Threaded | 3/16" | 000000000 | 0000 | 0000 |
| 10-24 | 2" | 3/8" | Partially Threaded | 1/2" | 000000000 | 0000 | 0000 |
| 10-32 | 2" | 3/8" | Partially Threaded | 1/2" | 000000000 | 0000 | 0000 |
| 1/4"-20 | 3" | 1/2" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 1/4"-20 | 6" | 1/2" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 1/4"-28 | 3" | 1/2" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 1/4"-28 | 6" | 1/2" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 5/16"-18 | 3" | 5/8" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 5/16"-18 | 6" | 5/8" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 5/16"-24 | 3" | 5/8" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 5/16"-24 | 6" | 5/8" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 3/8"-16 | 4" | 5/8" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 3/8"-16 | 6" | 5/8" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 3/8"-24 | 4" | 5/8" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 3/8"-24 | 6" | 5/8" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 7/16"-14 | 6" | 5/8" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 7/16"-20 | 4" | 5/8" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 7/16"-20 | 6" | 5/8" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 1/2"-13 | 4" | 3/4" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 1/2"-13 | 6" | 3/4" | Partially Threaded | 5/8" | 000000000 | 00000 | 00000 |
| 1/2"-20 | 4" | 3/4" | Partially Threaded | 3/4" | 000000000 | 00000 | 00000 |
| 1/2"-20 | 5" | 3/4" | Partially Threaded | 3/4" | 000000000 | 00000 | 00000 |
| 1/2"-20 | 6" | 3/4" | Partially Threaded | 3/4" | 000000000 | 00000 | 00000 |
| 9/16"-12 | 5" | 7/8" | Partially Threaded | 3/4" | 000000000 | 00000 | 00000 |
| 9/16"-18 | 4" | 7/8" | Partially Threaded | 3/4" | 000000000 | 00000 | 00000 |
| 9/16"-18 | 6" | 7/8" | Partially Threaded | 3/4" | 000000000 | 00000 | 00000 |
| 5/8"-11 | 4" | 7/8" | Partially Threaded | 15/16" | 000000000 | 00000 | 00000 |
| 5/8"-11 | 5" | 7/8" | Partially Threaded | 15/16" | 000000000 | 00000 | 00000 |
| 5/8"-11 | 6" | 7/8" | Partially Threaded | 15/16" | 000000000 | 00000 | 00000 |
| 5/8"-18 | 4" | 7/8" | Partially Threaded | 15/16" | 000000000 | 00000 | 00000 |
| 5/8"-18 | 5" | 7/8" | Partially Threaded | 15/16" | 000000000 | 00000 | 00000 |
| 5/8"-18 | 6" | 7/8" | Partially Threaded | 15/16" | 000000000 | 00000 | 00000 |
| 3/4"-10 | 4" | 1 1/8" | Partially Threaded | 3/4" | 000000000 | 00000 | 00000 |
| 3/4"-10 | 5" | 1 1/8" | Partially Threaded | 3/4" | 000000000 | 00000 | 00000 |
| 3/4"-10 | 8" | 1 1/8" | Partially Threaded | 3/4" | 000000000 | 000000 | 00000 |
| 3/4"-16 | 4" | 1 1/8" | Partially Threaded | 3/4" | 000000000 | 00000 | 00000 |
| 3/4"-16 | 5" | 1 1/8" | Partially Threaded | 3/4" | 000000000 | 00000 | 00000 |
Thread | Each | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Lg., mm | Wd., mm | Threading | Min. Thread Lg., mm | 1-9 | 10-Up | |
18-8 Stainless Steel | ||||||||
| M4 | 0.7 | 24 | 6 | Partially Threaded | 11.1 | 000000000 | 00000 | 00000 |
| M5 | 0.8 | 30 | 8 | Partially Threaded | 12.7 | 000000000 | 00000 | 0000 |
| M6 | 1 | 36 | 10 | Partially Threaded | 16 | 000000000 | 00000 | 00000 |
| M8 | 1.25 | 48 | 13 | Partially Threaded | 16 | 000000000 | 00000 | 00000 |
| M10 | 1.5 | 60 | 16 | Partially Threaded | 16 | 000000000 | 00000 | 00000 |
| M12 | 1.75 | 72 | 19 | Partially Threaded | 16 | 000000000 | 00000 | 00000 |
| M16 | 2 | 96 | 24 | Partially Threaded | 16 | 000000000 | 000000 | 00000 |
| M20 | 2.5 | 120 | 30 | Partially Threaded | 20 | 000000000 | 000000 | 000000 |
| M22 | 2.5 | 132 | 30 | Partially Threaded | 22 | 000000000 | 000000 | 000000 |
| M24 | 3 | 144 | 41 | Partially Threaded | 24 | 000000000 | 000000 | 000000 |
Steel Extra-Long Coupling Nuts
Also known as sleeve nuts, these are at least twice the length of standard coupling nuts to provide more room to connect and extend long lengths of threaded rods.
Zinc-plated steel nuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Each | ||||||
|---|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | Threading | 1-9 | 10-Up | |
Zinc-Plated Steel | ||||||
| 3/8"-16 | 4" | 3/4" | Partially Threaded | 000000000 | 000000 | 000000 |
| 1/2"-13 | 4" | 7/8" | Partially Threaded | 000000000 | 0000 | 0000 |
| 5/8"-11 | 5" | 1 1/8" | Partially Threaded | 000000000 | 00000 | 00000 |
| 3/4"-10 | 5" | 1 1/4" | Partially Threaded | 000000000 | 00000 | 00000 |
| 7/8"-9 | 7" | 1 3/8" | Partially Threaded | 000000000 | 00000 | 00000 |
| 1"-8 | 7" | 1 5/8" | Partially Threaded | 000000000 | 00000 | 00000 |
| 1 1/8"-7 | 7 1/2" | 1 3/4" | Partially Threaded | 000000000 | 00000 | 00000 |
| 1 1/4"-7 | 7 1/2" | 2" | Partially Threaded | 000000000 | 00000 | 00000 |
| 1 1/2"-6 | 8" | 2 3/8" | Partially Threaded | 000000000 | 00000 | 00000 |
Steel | ||||||
| 1 3/8"-6 | 8" | 2 1/4" | Partially Threaded | 000000000 | 00000 | 00000 |
| 1 3/4"-5 | 8 1/2" | 2 3/4" | Partially Threaded | 000000000 | 000000 | 00000 |
| 2"-4 1/2 | 9" | 3 1/4" | Partially Threaded | 000000000 | 000000 | 000000 |
| 2 1/4"-4 1/2 | 9 1/2" | 3 1/2" | Partially Threaded | 000000000 | 000000 | 000000 |
| 2 1/2"-4 | 10" | 4" | Partially Threaded | 000000000 | 000000 | 000000 |
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.
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.
Hex head screws fasten heavy loads. They’re generally shorter than lead screws and can be tightened with a wrench. Length is measured from under the head.
Head | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Lg. | Wd. | Ht. | Thread Fit | Fastener Strength Grade/Class | Hardness | Tensile Strength, psi | Each | |
Carbon Steel | |||||||||||||
| 1/4"-16 | 3" | 1 | 1:1 | 0.063" | 2 1/2" to Full | 7/16" | 5/32" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 000000 |
| 1/4"-16 | 4" | 1 | 1:1 | 0.063" | 3" to Full | 7/16" | 5/32" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1/4"-16 | 6" | 1 | 1:1 | 0.063" | 4" to Full | 7/16" | 5/32" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 3/8"-12 | 3" | 1 | 1:1 | 0.083" | 2 1/2" to Full | 9/16" | 15/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 3/8"-12 | 4" | 1 | 1:1 | 0.083" | 3 1/2" to Full | 9/16" | 15/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 3/8"-12 | 6" | 1 | 1:1 | 0.083" | 5 1/2" to Full | 9/16" | 15/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1/2"-10 | 3" | 1 | 1:1 | 0.1" | 2 1/2" to Full | 3/4" | 5/16" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1/2"-10 | 4" | 1 | 1:1 | 0.1" | 3 1/2" to Full | 3/4" | 5/16" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1/2"-10 | 6" | 1 | 1:1 | 0.1" | 5 1/2" to Full | 3/4" | 5/16" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 5/8"-8 | 3" | 1 | 1:1 | 0.125" | 2 1/2" to Full | 15/16" | 25/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 5/8"-8 | 4" | 1 | 1:1 | 0.125" | 3 1/2" to Full | 15/16" | 25/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 5/8"-8 | 6" | 1 | 1:1 | 0.125" | 5 1/2" to Full | 15/16" | 25/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 3/4"-6 | 3" | 1 | 1:1 | 0.167" | 2 1/2" to Full | 1 1/8" | 15/32" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 3/4"-6 | 4" | 1 | 1:1 | 0.167" | 3 1/2" to Full | 1 1/8" | 15/32" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 3/4"-6 | 6" | 1 | 1:1 | 0.167" | 5 1/2" to Full | 1 1/8" | 15/32" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 7/8"-6 | 3" | 1 | 1:1 | 0.167" | 2 1/2" to Full | 1 5/16" | 35/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 7/8"-6 | 4" | 1 | 1:1 | 0.167" | 3 1/2" to Full | 1 5/16" | 35/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 7/8"-6 | 6" | 1 | 1:1 | 0.167" | 5 1/2" to Full | 1 5/16" | 35/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1"-5 | 3" | 1 | 1:1 | 0.2" | 2 1/2" to Full | 1 1/2" | 39/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1"-5 | 4" | 1 | 1:1 | 0.2" | 3 1/2" to Full | 1 1/2" | 39/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1"-5 | 6" | 1 | 1:1 | 0.2" | 5 1/2" to Full | 1 1/2" | 39/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1 1/4"-5 | 3" | 1 | 1:1 | 0.2" | 2 1/2" to Full | 1 7/8" | 25/32" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1 1/4"-5 | 4" | 1 | 1:1 | 0.2" | 3 1/2" to Full | 1 7/8" | 25/32" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1 1/4"-5 | 6" | 1 | 1:1 | 0.2" | 5 1/2" to Full | 1 7/8" | 25/32" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1 1/2"-4 | 3" | 1 | 1:1 | 0.25" | 2 1/2" to Full | 2 1/4" | 15/16" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1 1/2"-4 | 4" | 1 | 1:1 | 0.25" | 3 1/2" to Full | 2 1/4" | 15/16" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1 1/2"-4 | 6" | 1 | 1:1 | 0.25" | 5 1/2" to Full | 2 1/4" | 15/16" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
Ball Screws and Nuts
Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. Also known as single-start ball screws and nuts, they have a single thread that runs the length of the screw. They operate with more torque than fast-travel ball screws and nuts. To ensure compatibility, select components that have the same thread direction and size. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.
Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
For technical drawings and 3-D models, click on a part number.
Ball screws with one machined end fit into an end support and are ready to connect to a motor. To adjust the length, the non-machined end can be cut to size.
Root diameter indicates the diameter the ball screw will be after machining away the threads.
Machined End | Keyway | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Root Dia. | Lg., ft. | No. of Thread Starts | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Shoulder Lg. | Overall Lg. | Thread Size | Dia. | Lg. | Wd. | Hardness | Tensile Strength, psi | Temperature Range, °F | Each | |
Alloy Steel | ||||||||||||||||
| 5/8"-5 | 0.5" | 2 | 1 | 0.2" | ±0.004" per ft. | 1 63/64" | 3 19/64" | 0.469"-32 | 13/32" | 1 1/4" | 1/8" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 0000000 |
| 5/8"-5 | 0.5" | 4 | 1 | 0.2" | ±0.004" per ft. | 1 63/64" | 3 19/64" | 0.469"-32 | 13/32" | 1 1/4" | 1/8" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
| 5/8"-5 | 0.5" | 6 | 1 | 0.2" | ±0.004" per ft. | 1 63/64" | 3 19/64" | 0.469"-32 | 13/32" | 1 1/4" | 1/8" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
| 3/4"-5 | 0.655" | 2 | 1 | 0.2" | ±0.004" per ft. | 2 3/16" | 3 3/16" | 0.586"-32 | 1/2" | 7/8" | 1/8" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
| 3/4"-5 | 0.655" | 4 | 1 | 0.2" | ±0.004" per ft. | 2 3/16" | 3 3/16" | 0.586"-32 | 1/2" | 7/8" | 1/8" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
| 3/4"-5 | 0.66" | 6 | 1 | 0.2" | ±0.004" per ft. | 2 3/16" | 3 3/16" | 0.586"-32 | 1/2" | 7/8" | 1/8" | Rockwell C56 | 85,000 | -40° to 300° | 0000000 | 000000 |
| 1"-4 | 0.84" | 2 | 1 | 0.25" | ±0.004" per ft. | 2 23/32" | 4 1/32" | 0.781"-32 | 5/8" | 1 1/4" | 3/16" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
| 1"-4 | 0.84" | 4 | 1 | 0.25" | ±0.004" per ft. | 2 23/32" | 4 1/32" | 0.781"-32 | 5/8" | 1 1/4" | 3/16" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
| 1"-4 | 0.84" | 6 | 1 | 0.25" | ±0.004" per ft. | 2 23/32" | 4 1/32" | 0.781"-32 | 5/8" | 1 1/4" | 3/16" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
Self-Reversing Lead Screws and Nuts
A crisscross thread pattern allows you to drive the nut back and forth without changing the lead screw's direction of rotation. When the nut reaches one end of the lead screw, it changes direction and travels back to the other end. Also known as diamond lead screws, they're sometimes used to guide cable and wire as it's spooled on a reel.
Travel distance per turn, also known as screw lead, is the distance the nut moves with one revolution of the lead screw.
For technical drawings and 3-D models, click on a part number.
Lead Screw | Square Nut | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Screw Dia. | Lg. | Travel Lg. | Hardness | Overall Ht. | Center Ht. | Hardness | No. of Thread Starts | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Tensile Strength, psi | Dynamic Thrust Load Cap., lbs. | Temperature Range, °F | Each | |
1144 Carbon Steel Lead Screw with Aluminum Square Nut | ||||||||||||||
| 3/4" | 16 7/8" | 5 13/16" | Rockwell C27 | 1 7/8" | 11/16" | Brinell 60 | 1 | 0.75" | ±0.007" per in. | 130,000 | 100 | -50° to 350° | 000000000 | 000000000 |
| 3/4" | 19 7/8" | 8 13/16" | Rockwell C27 | 1 7/8" | 11/16" | Brinell 60 | 1 | 0.75" | ±0.007" per in. | 130,000 | 100 | -50° to 350° | 000000000 | 00000000 |
| 1" | 23 1/2" | 11 3/4" | Rockwell C27 | 2 3/8" | 7/8" | Brinell 60 | 1 | 1" | ±0.005" per in. | 130,000 | 150 | -50° to 350° | 000000000 | 00000000 |
| 1" | 29 1/2" | 17 3/4" | Rockwell C27 | 2 3/8" | 7/8" | Brinell 60 | 1 | 1" | ±0.005" per in. | 130,000 | 150 | -50° to 350° | 000000000 | 00000000 |