System of Measurement System of Measurement |
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Thread Size Thread Size |
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Component Component |
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![]() | Nut |
Nut Type Nut Type |
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![]() | Flange |
Length Length |
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Diameter Diameter | Show |
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Diameter Diameter | Hide |
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Material Material |
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Number of Mounting Holes Number of Mounting Holes |
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Thread Direction Thread Direction |
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Hardness Hardness |
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Flange Material Flange Material |
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Flange Hardness Flange Hardness |
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Flange Height Flange Height |
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Flange Width Flange Width |
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Maximum Temperature Maximum Temperature |
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Minimum Temperature Minimum Temperature |
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Mounting Hole Center-to-Center Mounting HoleCenter-to-Center |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Selecting Compatible Lead Screws and Nuts
More
Fast-Travel Ultra-Precision Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. Operating with less backlash (play) than Precision Acme Lead Screws and Nuts, these lead screws and nuts provide increased nut life and more reliable movement in automated systems. All components are corrosion resistant for use in harsh environments. To ensure compatibility, select components that have the same thread type, thread size, and number of thread starts.
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.

Flange nuts with wear-compensating internal O-ring or wear-compensating spring maintain a tight fit even when their threads begin to wear.
Flange | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Lg. | Dia. | Wd. | Ht. | Thick. | No. of Thread Starts | Thread Type | Speed Ratio | Travel Distance per Turn | Mounting Hole Ctr.-to-Ctr. | Tensile Strength, psi | Dynamic Thrust Load Cap., lbs. | Each | ||
Acetal Plastic | |||||||||||||||
A | 9/64"-20.8 | 1/2" | 0.406" | 3/4" | 13/32" | 1/8" | 2 | Rounded Acme | 2:1 | 0.096" | 39/64" | Not Rated | 25 | 0000000 | 000000 |
A | 5/32"-21.3 | 1/2" | 0.406" | 3/4" | 13/32" | 1/8" | 2 | Rounded Acme | 2:1 | 0.094" | 39/64" | Not Rated | 25 | 0000000 | 00000 |
A | 3/16"-42.7 | 1/2" | 0.406" | 3/4" | 13/32" | 1/8" | 16 | Rounded Acme | 16:1 | 0.375" | 39/64" | Not Rated | 25 | 0000000 | 00000 |
A | 7/32"-20.8 | 1/2" | 0.406" | 3/4" | 13/32" | 1/8" | 4 | Rounded Acme | 4:1 | 0.192" | 39/64" | Not Rated | 25 | 0000000 | 00000 |
Acetal Plastic with Wear-Compensating Internal O-Ring | |||||||||||||||
A | 9/64"-20.8 | 1/2" | 0.406" | 3/4" | 13/32" | 1/8" | 2 | Rounded Acme | 2:1 | 0.096" | 39/64" | Not Rated | 5 | 0000000 | 00000 |
A | 5/32"-21.3 | 1/2" | 0.406" | 3/4" | 13/32" | 1/8" | 2 | Rounded Acme | 2:1 | 0.094" | 39/64" | Not Rated | 5 | 0000000 | 00000 |
A | 3/16"-42.7 | 1/2" | 0.406" | 3/4" | 13/32" | 1/8" | 16 | Rounded Acme | 16:1 | 0.375" | 39/64" | Not Rated | 5 | 0000000 | 00000 |
A | 7/32"-20.8 | 1/2" | 0.406" | 3/4" | 13/32" | 1/8" | 4 | Rounded Acme | 4:1 | 0.192" | 39/64" | Not Rated | 5 | 0000000 | 00000 |
Ultra-Precision Lead Screws and Nuts

Operating with less backlash (play) than Precision Acme Lead Screws and Nuts, these provide increased nut life and more reliable movement in automated systems. 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. All components are corrosion resistant for use in harsh environments. To ensure compatibility, select components that have the same thread type and thread size.
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.


Flange nuts with wear-compensating internal O-ring or wear-compensating spring maintain a tight fit even when their threads begin to wear.
Flange | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Lg. | Dia. | Wd. | Ht. | Thick. | No. of Thread Starts | Thread Type | Speed Ratio | Travel Distance per Turn | Mounting Hole Ctr.-to-Ctr. | Tensile Strength, psi | Dynamic Thrust Load Cap., lbs. | Each | ||
Acetal Plastic | |||||||||||||||
A | 9/64"-20.8 | 1/2" | 0.406" | 3/4" | 13/32" | 1/8" | 1 | Rounded Acme | 1:1 | 0.048" | 39/64" | Not Rated | 25 | 0000000 | 000000 |
A | 9/64"-41.7 | 1/2" | 0.406" | 3/4" | 13/32" | 1/8" | 1 | Rounded Acme | 1:1 | 0.024" | 39/64" | Not Rated | 25 | 0000000 | 00000 |
A | 7/32"-20.8 | 1/2" | 0.406" | 3/4" | 13/32" | 1/8" | 1 | Rounded Acme | 1:1 | 0.048" | 39/64" | Not Rated | 25 | 0000000 | 00000 |
Acetal Plastic with Wear-Compensating Internal O-Ring | |||||||||||||||
A | 9/64"-20.8 | 1/2" | 0.406" | 3/4" | 13/32" | 1/8" | 1 | Rounded Acme | 1:1 | 0.048" | 39/64" | Not Rated | 5 | 0000000 | 00000 |
A | 9/64"-41.7 | 1/2" | 0.406" | 3/4" | 13/32" | 1/8" | 1 | Rounded Acme | 1:1 | 0.024" | 39/64" | Not Rated | 5 | 0000000 | 00000 |
A | 7/32"-20.8 | 1/2" | 0.406" | 3/4" | 13/32" | 1/8" | 1 | Rounded Acme | 1:1 | 0.048" | 39/64" | Not Rated | 5 | 0000000 | 00000 |