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Export Control Classification Number (ECCN)
DFARS Specialty Metals
Metric Fast-Travel Ultra-Precision Lead Screws and Nuts
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Style A | Style B | Style E | Style F |
Round Nuts—Right-Hand Thread
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Style A |
Acetal—Acetal nuts have good wear and corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
Style | Thread Size | Lg. | Dia. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn, mm | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap. | Temp., ° F | Each | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Acetal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| A | M8 × 2.5 mm | 15/32" | 0.709" | Metric Rounded Trapezoidal | 4:1 | 4 | 10 | Durometer 74D | 10,000 | Not Rated | -40 to 185 | 0000000 | 000000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Externally Threaded Nuts—Right-Hand Thread
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Style B |
Acetal—Acetal nuts have good wear and corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
External Thread | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Style | Thread Size | Lg. | Dia. | Hex Wd. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn, mm | Size | Lg. | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lb. | Temp., ° F | Each | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Acetal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| B | M8 × 2 mm | 1" | 0.548" | 11/16" | Metric Rounded Trapezoidal | 2:1 | 2 | 4 | 5/8"-18 | 1/4" | Not Rated | 8,000 | 75 | -40 to 185 | 000000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Flange Nuts—Right-Hand Thread
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Style E | Style F |
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Style E |
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Style F |
Acetal—Acetal nuts have good wear and corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
Flange | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Style | Thread Size | Lg. | Dia. | Dia. | Thk. | Thread Type | Speed Ratio | Bolt Circle Dia. | No. of Thread Starts | Travel Distance per Turn, mm | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lb. | No. of Mounting Holes | Temp., ° F | Each | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Acetal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| E | M8 × 2 mm | 3/4" | 0.548" | 1 1/8" | 3/16" | Metric Rounded Trapezoidal | 2:1 | 7/8" | 2 | 4 | Not Rated | 8,000 | 75 | 3 | -40 to 185 | 000000000 | 000000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| F | M8 × 2.5 mm | 25/32" | 0.787" | 1 27/64" | 5/16" | Metric Rounded Trapezoidal | 4:1 | 1 7/64" | 4 | 10 | Durometer 74D | 10,000 | Not Rated | 6 | -40 to 185 | 0000000 | 00000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Metric Ultra-Precision Lead Screws and Nuts
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Style A | Style D |
Operating with less backlash (play) than Metric 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. To ensure compatibility, select components that have the same thread size, thread type, thread size, thread pitch, and number of thread starts.
Externally Threaded Nuts—Right-Hand Thread
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Style A |
Acetal—Acetal nuts have good wear and corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
External Thread | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Style | Thread Size | Lg. | Dia. | Hex Wd. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn, mm | Size | Lg. | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lb. | Temp., ° F | Each | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Acetal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| A | M8 × 1.5 mm | 1" | 0.548" | 11/16" | Metric Rounded Trapezoidal | 1:1 | 1 | 1.5 | 5/8"-18 | 1/4" | Not Rated | 8,000 | 75 | -40 to 185 | 0000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Flange Nuts—Right-Hand Thread
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Style D | Style D |
Acetal—Acetal nuts have good wear and corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
Flange | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Style | Thread Size | Lg. | Dia. | Dia. | Thk. | Thread Type | Speed Ratio | Bolt Circle Dia. | No. of Thread Starts | Travel Distance per Turn, mm | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lb. | No. of Mounting Holes | Temp., ° F | Each | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Acetal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| D | M8 × 1.5 mm | 3/4" | 0.548" | 1 1/8" | 3/16" | Metric Rounded Trapezoidal | 1:1 | 7/8" | 1 | 1.5 | Not Rated | 8,000 | 75 | 3 | -40 to 185 | 0000000 | 000000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Ball Screws and Nuts
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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.
Ball Screws with Flange Ball Nut—Right-Hand Threaded
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Root diameter indicates the diameter the ball screw will be after machining away the threads.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
Ball Screw | Flange Ball Nut, mm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Thread Size | Lg., mm | Root Dia., mm | Tensile Strength, psi | Lg. | Dia. | Lg. Tolerance Type | No. of Thread Starts | Travel Distance per Turn, mm | Accuracy for Travel Distance per Turn | Hardness | Dynamic Thrust Load Cap., lb. | Max. Backlash, mm | Temp. Range, ° F | Each | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Carbon Steel Ball Screw with Alloy Steel Flange Ball Nut | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| M8 | 150 | 6.6 | 21,000 | 28 | 20 | Plus | 1 | 2 | ±0.210 mm/300 mm | Rockwell C58 | 470 | 0.05 | 5 to 175 | 0000000 | 0000000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| M8 | 250 | 6.6 | 21,000 | 28 | 20 | Plus | 1 | 2 | ±0.210 mm/300 mm | Rockwell C58 | 470 | 0.05 | 5 to 175 | 000000 | 000000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
