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DFARS Specialty Metals
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Metric Precision Lead Screws and Nuts
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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, select components that have the same thread direction, size, and number of thread starts.
Round Nuts—Right-Hand Thread
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932 Bearing Bronze—932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair 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.
Thread Size | Lg. | Dia. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn, mm | Thread Fit | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lb. | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
932 Bearing Bronze | |||||||||||||||
| M10 × 2 mm | 3/4" | 0.75" | Metric Trapezoidal | 1:1 | 1 | 2 | Metric Trapezoidal Class 7H | Brinell 70 | Not Rated | 670 | DIN 103 | 7549K32 | 000000 | ||
| M12 × 3 mm | 1" | 0.875" | Metric Trapezoidal | 1:1 | 1 | 3 | Metric Trapezoidal Class 7H | Brinell 70 | Not Rated | 1,100 | DIN 103 | 7549K33 | 00000 | ||
| M16 × 3 mm | 1 1/8" | 1.125" | Metric Trapezoidal | 1:1 | 1 | 3 | Metric Trapezoidal Class 7H | Brinell 70 | Not Rated | 2,000 | DIN 103 | 7549K35 | 00000 | ||
| M20 × 4 mm | 1 1/2" | 1.25" | Metric Trapezoidal | 1:1 | 1 | 4 | Metric Trapezoidal Class 7H | Brinell 70 | Not Rated | 3,100 | DIN 103 | 7549K37 | 00000 | ||
| M24 × 5 mm | 2" | 1.75" | Metric Trapezoidal | 1:1 | 1 | 5 | Metric Trapezoidal Class 7H | Brinell 70 | Not Rated | 4,500 | DIN 103 | 7549K38 | 00000 | ||
| M28 × 5 mm | 2" | 1.75" | Metric Trapezoidal | 1:1 | 1 | 5 | Metric Trapezoidal Class 7H | Brinell 69 | 44,000 | 6,100 | DIN 103 | 7549K87 | 00000 | ||
| M40 × 7 mm | 3" | 2.5" | Metric Trapezoidal | 1:1 | 1 | 7 | Metric Trapezoidal Class 7H | Brinell 70 | Not Rated | 12,300 | DIN 103 | 7549K43 | 00000 | ||
Externally Threaded Nuts—Right-Hand Thread
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Manganese Bronze—Manganese bronze nuts have good strength and wear 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 | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Lg. | Dia. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn, mm | Size | Lg. | Thread Fit | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lb. | Specs. Met | Each | |||
Manganese Bronze | |||||||||||||||||
| M10 × 2 mm | 5/8" | 0.68" | Metric Trapezoidal | 1:1 | 1 | 2 | 9/16"-18 | 3/8" | Metric Trapezoidal Class 7H | Brinell 126 | 75,000 | 670 | DIN 103 | 7549K88 | 000000 | ||
| M12 × 3 mm | 3/4" | 1.125" | Metric Trapezoidal | 1:1 | 1 | 3 | 15/16"-16 | 1/2" | Metric Trapezoidal Class 7H | Brinell 126 | 75,000 | 1,100 | DIN 103 | 7549K89 | 00000 | ||
| M16 × 3 mm | 1" | 1.125" | Metric Trapezoidal | 1:1 | 1 | 3 | 15/16"-16 | 1/2" | Metric Trapezoidal Class 7H | Brinell 126 | 75,000 | 2,000 | DIN 103 | 7549K91 | 00000 | ||
| M20 × 4 mm | 1 1/4" | 1.125" | Metric Trapezoidal | 1:1 | 1 | 4 | 1"-18 | 1/2" | Metric Trapezoidal Class 7H | Brinell 126 | 75,000 | 3,100 | DIN 103 | 7549K92 | 00000 | ||
| M24 × 5 mm | 1 1/2" | 1.5" | Metric Trapezoidal | 1:1 | 1 | 5 | 1 3/8"-16 | 1/2" | Metric Trapezoidal Class 7H | Brinell 126 | 75,000 | 4,500 | DIN 103 | 7549K93 | 000000 | ||
| M28 × 5 mm | 1 3/4" | 2.125" | Metric Trapezoidal | 1:1 | 1 | 5 | 1 31/32"-18 | 13/16" | Metric Trapezoidal Class 7H | Brinell 126 | 75,000 | 6,100 | DIN 103 | 7549K94 | 000000 | ||
| M40 × 7 mm | 2 19/64" | 2.125" | Metric Trapezoidal | 1:1 | 1 | 7 | 1 31/32"-18 | 13/16" | Metric Trapezoidal Class 7H | Brinell 126 | 75,000 | 12,300 | DIN 103 | 7549K95 | 000000 | ||
Flange Nuts—Right-Hand Thread
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Manganese Bronze—Manganese bronze nuts have good strength and wear 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 | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Lg. | Dia. | Dia. | Thk. | Thread Type | Speed Ratio | Bolt Circle Dia. | No. of Thread Starts | Travel Distance per Turn, mm | Thread Fit | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lb. | No. of Mounting Holes | Specs. Met | Each | |||
Manganese Bronze | |||||||||||||||||||
| M10 × 2 mm | 5/8" | 0.688" | 1 39/64" | 13/32" | Metric Trapezoidal | 1:1 | 1 1/8" | 1 | 2 | Metric Trapezoidal Class 7H | Brinell 126 | Not Rated | 670 | 4 | DIN 103 | 7549K16 | 000000 | ||
| M12 × 3 mm | 3/4" | 1.125" | 2 39/64" | 17/32" | Metric Trapezoidal | 1:1 | 2 3/32" | 1 | 3 | Metric Trapezoidal Class 7H | Brinell 126 | Not Rated | 1,100 | 4 | DIN 103 | 7549K17 | 00000 | ||
| M16 × 3 mm | 1" | 1.125" | 2 39/64" | 17/32" | Metric Trapezoidal | 1:1 | 2 3/32" | 1 | 3 | Metric Trapezoidal Class 7H | Brinell 126 | Not Rated | 2,000 | 4 | DIN 103 | 7549K19 | 00000 | ||
| M20 × 4 mm | 1 1/4" | 1.125" | 2 39/64" | 17/32" | Metric Trapezoidal | 1:1 | 2 3/32" | 1 | 4 | Metric Trapezoidal Class 7H | Brinell 126 | Not Rated | 3,100 | 4 | DIN 103 | 7549K22 | 00000 | ||
| M24 × 5 mm | 1 1/2" | 1.5" | 2 3/4" | 33/64" | Metric Trapezoidal | 1:1 | 2 17/64" | 1 | 5 | Metric Trapezoidal Class 7H | Brinell 126 | Not Rated | 4,500 | 4 | DIN 103 | 7549K23 | 00000 | ||
| M28 × 5 mm | 1 3/4" | 2.125" | 4 13/64" | 53/64" | Metric Trapezoidal | 1:1 | 3 7/16" | 1 | 5 | Metric Trapezoidal Class 7H | Brinell 126 | 75,000 | 6,100 | 4 | DIN 103 | 7549K86 | 000000 | ||
| M40 × 7 mm | 2 19/64" | 2.125" | 4 13/64" | 53/64" | Metric Trapezoidal | 1:1 | 3 7/16" | 1 | 7 | Metric Trapezoidal Class 7H | Brinell 126 | Not Rated | 12,300 | 4 | DIN 103 | 7549K27 | 000000 | ||
Metric Lead Screws and Nuts
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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, size, and number of thread starts. Class 7e and 7H components are compatible.
Flange Nuts—Right-Hand Thread
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Flange nuts move objects along the length of a lead screw. They have a wide machinable flange for custom mounting.
932 Bearing Bronze—932 bearing bronze components are more wear resistant than brass components. They have good machinability and fair 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, mm | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Thread Type | Ht., mm | Dia., mm | Dia. | Thk. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Thread Fit | Hardness | Tensile Strength | Each | |||
932 Bearing Bronze | |||||||||||||||
| M10 × 2 mm | Metric Trapezoidal | 35 | 28 | 48 | 12 | 1 | 1:1 | 2 | Metric Trapezoidal Class 7H | Not Rated | Not Rated | 94353A321 | 0000000 | ||
| M12 × 3 mm | Metric Trapezoidal | 35 | 28 | 48 | 12 | 1 | 1:1 | 3 | Metric Trapezoidal Class 7H | Not Rated | Not Rated | 94353A322 | 00000 | ||
| M16 × 4 mm | Metric Trapezoidal | 35 | 28 | 48 | 12 | 1 | 1:1 | 4 | Metric Trapezoidal Class 7H | Not Rated | Not Rated | 94353A323 | 00000 | ||
| M20 × 4 mm | Metric Trapezoidal | 44 | 32 | 55 | 12 | 1 | 1:1 | 4 | Metric Trapezoidal Class 7H | Not Rated | Not Rated | 94353A324 | 00000 | ||
| M26 × 5 mm | Metric Trapezoidal | 46 | 38 | 62 | 14 | 1 | 1:1 | 5 | Metric Trapezoidal Class 7H | Not Rated | Not Rated | 94353A325 | 000000 | ||
| M40 × 7 mm | Metric Trapezoidal | 66 | 63 | 98 | 16 | 1 | 1:1 | 7 | Metric Trapezoidal Class 7H | Not Rated | Not Rated | 94353A326 | 000000 | ||
Hex Nuts—Right-Hand Thread
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Hex nuts fasten and position lead screw components.
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.
Thread Size | Thread Type | Ht., mm | Wd., mm | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Thread Fit | Fastener Strength Grade/Class | Hardness | Tensile Strength | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Carbon Steel | ||||||||||||||
| M12 × 3 mm | Metric Trapezoidal | 12 | 22.2 | 1 | 1:1 | 3 | Metric Trapezoidal Class 7H | SAE Grade 2 | Not Rated | Not Rated | 94353A120 | 000000 | ||
| M16 × 4 mm | Metric Trapezoidal | 16 | 27 | 1 | 1:1 | 4 | Metric Trapezoidal Class 7H | SAE Grade 2 | Not Rated | Not Rated | 94353A160 | 00000 | ||
| M20 × 4 mm | Metric Trapezoidal | 20 | 31.75 | 1 | 1:1 | 4 | Metric Trapezoidal Class 7H | SAE Grade 2 | Not Rated | Not Rated | 94353A200 | 00000 | ||
| M26 × 5 mm | Metric Trapezoidal | 25.4 | 41.3 | 1 | 1:1 | 5 | Metric Trapezoidal Class 7H | SAE Grade 2 | Not Rated | Not Rated | 94353A260 | 00000 | ||
| M40 × 7 mm | Metric Trapezoidal | 39.9 | 60.33 | 1 | 1:1 | 7 | Metric Trapezoidal Class 7H | SAE Grade 2 | Not Rated | Not Rated | 94353A400 | 00000 | ||
Square Nuts—Right-Hand Thread
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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.
360 Brass—360 brass components have excellent machinability and good 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.
Thread Size | Thread Type | Ht., mm | Wd., mm | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Thread Fit | Hardness | Tensile Strength | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
360 Brass | |||||||||||||
| M10 × 2 mm | Metric Trapezoidal | 20 | 19 | 1 | 1:1 | 2 | Metric Trapezoidal Class 7H | Not Rated | Not Rated | 94353A311 | 000000 | ||
| M12 × 3 mm | Metric Trapezoidal | 25 | 25 | 1 | 1:1 | 3 | Metric Trapezoidal Class 7H | Not Rated | Not Rated | 94353A312 | 00000 | ||
| M16 × 4 mm | Metric Trapezoidal | 35 | 28 | 1 | 1:1 | 4 | Metric Trapezoidal Class 7H | Not Rated | Not Rated | 94353A313 | 00000 | ||
| M20 × 4 mm | Metric Trapezoidal | 50 | 38 | 1 | 1:1 | 4 | Metric Trapezoidal Class 7H | Not Rated | Not Rated | 94353A314 | 000000 | ||
