Thread Direction Thread Direction | Show |
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 | Left Hand |
Thread Direction Thread Direction | Hide |
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| Right Hand | Left Hand |
System of Measurement System of Measurement |
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Nut Type Nut Type |
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| Externally Threaded | Flange |
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| Hex | Locknut |
Fastener Strength Grade/Class Fastener StrengthGrade/Class |
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 | Grade 8 |
Finish Finish |
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Material Material |
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Hex Nut Profile Hex Nut Profile |
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 | Standard |
Locking Type Locking Type |
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 | Distorted Thread |
Component Component |
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 | Ball Screw |
| Ball Nut |
Thread Spacing Thread Spacing |
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Distorted Thread Type Distorted Thread Type |
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 | Center Lock |
Drive Style Drive Style |
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 | External Hex |
Thread Fit Thread Fit |
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Number of Thread Starts Number of Thread Starts |
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Maximum Temperature Maximum Temperature |
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Minimum Temperature Minimum Temperature |
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Hardness Hardness |
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Selecting Compatible Lead Screws and Nuts
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About Nuts, Materials, and Finishes
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Left-Hand Threaded High-Strength Steel
Center-Lock Distorted-Thread Locknuts—Grade 8
These locknuts tighten when turned to the left. They have an irregularly shaped thread in the middle of the nut that grips the bolt for a stronger hold than nylon-insert locknuts. Also known as reversible locknuts, they can be threaded on from either end. They're about three times stronger than low-strength steel locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads. They're not reusable. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
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.
Root diameter indicates the diameter the ball screw will be after machining away the threads.
| Thread Size | Lg., ft. | No. of Thread Starts | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Root Dia. | Hardness | Tensile Strength, psi | Temperature Range, °F | Each | |
Alloy Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 5/8"-5 | 1 | 1 | 0.2" | ±0.004" per ft. | 0.503" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
| 5/8"-5 | 2 | 1 | 0.2" | ±0.004" per ft. | 0.503" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 00000 |
| 5/8"-5 | 3 | 1 | 0.2" | ±0.004" per ft. | 0.503" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 00000 |
| 5/8"-5 | 6 | 1 | 0.2" | ±0.004" per ft. | 0.503" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
| 1"-4 | 1 | 1 | 0.25" | ±0.004" per ft. | 0.836" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 00000 |
| 1"-4 | 2 | 1 | 0.25" | ±0.004" per ft. | 0.836" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
| 1"-4 | 3 | 1 | 0.25" | ±0.004" per ft. | 0.836" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
| 1"-4 | 6 | 1 | 0.25" | ±0.004" per ft. | 0.836" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
Secure a way wiper on the end of a ball nut to sweep chips and other contaminants out of the way as it moves across the ball screw.
Ball Nuts | Way Wipers | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | Ht. | No. of Thread Starts | Travel Distance per Turn | External Thread Size | Hardness | Dynamic Thrust Load Cap., lbs. | Max. Backlash | Temperature Range, °F | Each | Each | |||
Black-Oxide Alloy Steel | |||||||||||||||
| A | 1"-4 | 2 11/32" | __ | __ | 1 | 0.25" | 1.563"-18 | Rockwell C56 | 1,600 | 0.015" | -40° to 300° | 00000000 | 0000000 | 0000000 | 000000 |
| B | 5/8"-5 | 1 45/64" | 1" | 1" | 1 | 0.2" | 15/16"-16 | Rockwell C56 | 770 | 0.015" | -40° to 300° | 00000000 | 00000 | 0000000 | 00000 |
Flange | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | Ht. | Dia. | Dia. | Thick. | No. of Thread Starts | Travel Distance per Turn | Bolt Circle Dia. | Hardness | Dynamic Thrust Load Cap., lbs. | Max. Backlash | Temperature Range, °F | Each | ||
Black-Oxide Alloy Steel | ||||||||||||||||
| D | 5/8"-5 | 1 45/64" | 1" | 1" | __ | 2 19/32" | 17/32" | 1 | 0.2" | 2 3/32" | Rockwell C56 | 770 | 0.015" | -40° to 300° | 00000000 | 0000000 |
| D | 1"-4 | 2 11/32" | 1 1/2" | 1 1/2" | 1" | 3 1/4" | 5/8" | 1 | 0.25" | 2 3/4" | Rockwell C56 | 1,600 | 0.015" | -40° to 300° | 00000000 | 000000 |