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Export Control Classification Number (ECCN)
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DFARS Specialty Metals
About Lead Screws and Nuts
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Compare lead screws and nuts by the size, direction, fit, and starts of their threads.
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, thread size, and number of thread starts.
Lead Screws—Right-Hand Thread
 |
Carbon Steel—Carbon steel components are easier to machine than alloy steel components.
Alloy Steel—Alloy steel components are harder and stronger than carbon steel components.
18-8 Stainless Steel—18-8 stainless steel components have good corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
Thread Size | Thread Type | Lg. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Fastener Strength Grade/Class | Hardness | Tensile Strength | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Carbon Steel | ||||||||||||||
| 1 1/4"-4 | Acme | 12" | 1 | 1:1 | 0.25" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 64,000 psi | ASTM A108 | 98935A761 | 000000 | ||
| 1 1/4"-4 | Acme | 3 ft. | 1 | 1:1 | 0.25" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 64,000 psi | ASTM A108 | 98935A877 | 00000 | ||
| 1 1/4"-4 | Acme | 6 ft. | 1 | 1:1 | 0.25" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 53,000 psi | ASTM A108 | 98935A112 | 00000 | ||
| 1 1/4"-4 | Acme | 12 ft. | 1 | 1:1 | 0.25" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 64,000 psi | ASTM A108 | 98935A682 | 000000 | ||
Alloy Steel | ||||||||||||||
| 1 1/4"-4 | Acme | 12" | 1 | 1:1 | 0.25" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 psi | ASTM A193 | 93410A976 | 00000 | ||
| 1 1/4"-4 | Acme | 3 ft. | 1 | 1:1 | 0.25" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 psi | ASTM A193 | 93410A650 | 000000 | ||
| 1 1/4"-4 | Acme | 6 ft. | 1 | 1:1 | 0.25" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 psi | ASTM A193 | 93410A220 | 000000 | ||
| 1 1/4"-4 | Acme | 12 ft. | 1 | 1:1 | 0.25" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 psi | ASTM A193 | 93410A871 | 000000 | ||
18-8 Stainless Steel | ||||||||||||||
| 1 1/4"-4 | Acme | 3 ft. | 1 | 1:1 | 0.25" | Acme Class 2G | — | Rockwell B96 | Not Rated | — | 95061A857 | 000000 | ||
| 1 1/4"-4 | Acme | 6 ft. | 1 | 1:1 | 0.25" | Acme Class 2G | — | Rockwell B96 | Not Rated | — | 95061A201 | 000000 | ||
Lead Screws—Left-Hand Thread
|
Carbon Steel—Carbon steel components are easier to machine than alloy steel components.
Alloy Steel—Alloy steel components are harder and stronger than carbon steel components.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
Thread Size | Thread Type | Lg., ft. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Fastener Strength Grade/Class | Hardness | Tensile Strength, psi | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Carbon Steel | ||||||||||||||
| 1 1/4"-4 | Acme | 3 | 1 | 1:1 | 0.25" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 98935A519 | 000000 | ||
| 1 1/4"-4 | Acme | 6 | 1 | 1:1 | 0.25" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 98935A520 | 000000 | ||
Alloy Steel | ||||||||||||||
| 1 1/4"-4 | Acme | 3 | 1 | 1:1 | 0.25" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 | ASTM A193 | 93410A524 | 000000 | ||
| 1 1/4"-4 | Acme | 6 | 1 | 1:1 | 0.25" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 | ASTM A193 | 93410A525 | 000000 | ||
Coupling Nuts—Right-Hand Thread
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Coupling nuts connect two lead screws.
Carbon Steel—Carbon steel components are easier to machine than alloy steel components.
18-8 Stainless Steel—18-8 stainless steel components have good corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
Thread Size | Thread Type | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Carbon Steel | |||||||||||||
| 1 1/4"-4 | Acme | 3" | 1 5/8" | 1 | 1:1 | 0.25" | Acme Class 2G | Rockwell B75 | Not Rated | 93023A671 | 000000 | ||
18-8 Stainless Steel | |||||||||||||
| 1 1/4"-4 | Acme | 3" | 1 5/8" | 1 | 1:1 | 0.25" | Acme Class 2G | Not Rated | Not Rated | 93030A123 | 000000 | ||
Coupling Nuts—Left-Hand Thread
|
Coupling nuts connect two lead screws.
Carbon Steel—Carbon steel components are easier to machine than alloy steel components.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
Thread Size | Thread Type | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Carbon Steel | |||||||||||||
| 1 1/4"-4 | Acme | 3" | 1 5/8" | 1 | 1:1 | 0.25" | Acme Class 2G | Rockwell B75 | Not Rated | 93026A658 | 000000 | ||
Flange Nuts—Right-Hand Thread
 |
Flange nuts move objects along the length of a lead screw. Flange nuts 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 or handle moves with one revolution of the lead screw.
Flange | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Thread Type | Ht. | Dia. | Dia. | Thk. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength | Each | |||
932 Bearing Bronze | |||||||||||||||
| 1 1/4"-4 | Acme | 2 1/2" | 2" | 3" | 3/4" | 1 | 1:1 | 0.25" | Acme Class 2G | Not Rated | Not Rated | 95120A171 | 0000000 | ||
Flange Nuts—Left-Hand Thread
|
Flange nuts move objects along the length of a lead screw. Flange nuts 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 or handle moves with one revolution of the lead screw.
Flange | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Thread Type | Ht. | Dia. | Dia. | Thk. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength | Each | |||
932 Bearing Bronze | |||||||||||||||
| 1 1/4"-4 | Acme | 2 1/2" | 2" | 3" | 3/4" | 1 | 1:1 | 0.25" | Acme Class 2G | Not Rated | Not Rated | 95120A571 | 0000000 | ||
Round Nuts—Right-Hand Thread
 |
Round nuts move objects along the length of a lead screw.
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 or handle moves with one revolution of the lead screw.
Thread Size | Thread Type | Ht. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
932 Bearing Bronze | ||||||||||||||
| 1 1/4"-4 | Acme | 2 1/64" | 2 5/32" | 1 | 1:1 | 0.25" | Acme Class 2G | Not Rated | Not Rated | ASTM B505 | 95090A507 | 000000 | ||
Hex Nuts—Right-Hand Thread
 |
Hex nuts fasten and position lead screw components.
Carbon Steel—Carbon steel components are easier to machine than alloy steel components.
Zinc-Plated Carbon Steel—Zinc-plated carbon steel components have mild corrosion resistance and are easier to machine than alloy steel components.
18-8 Stainless Steel—18-8 stainless steel components have good corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
Thread Size | Thread Type | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Carbon Steel | |||||||||||||
| 1 1/4"-4 | Acme | 1 1/4" | 2" | 1 | 1:1 | 0.25" | Acme Class 2G | Rockwell B75 | Not Rated | 94815A112 | 000000 | ||
Zinc-Plated Carbon Steel | |||||||||||||
| 1 1/4"-4 | Acme | 1 7/32" | 2" | 1 | 1:1 | 0.25" | Acme Class 2G | Rockwell B75 | Not Rated | 98948A126 | 00000 | ||
18-8 Stainless Steel | |||||||||||||
| 1 1/4"-4 | Acme | 1 1/4" | 2" | 1 | 1:1 | 0.25" | Acme Class 2G | Not Rated | Not Rated | 95066A225 | 00000 | ||
Hex Nuts—Left-Hand Thread
|
Hex nuts fasten and position lead screw components.
Carbon Steel—Carbon steel components are easier to machine than alloy steel components.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
Thread Size | Thread Type | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Fastener Strength Grade/Class | Hardness | Tensile Strength, psi | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Carbon Steel | ||||||||||||||
| 1 1/4"-4 | Acme | 1 7/32" | 2" | 1 | 1:1 | 0.25" | Acme Class 2G | SAE Grade 2 | Rockwell B85 | 64,000 | 91808A118 | 000000 | ||
Flat Handles—Right-Hand Thread
 |
Handles fasten and position lead screw components. Handles are easy to grip and tighten by hand for quick assembly and disassembly.
Cast Iron—Cast iron components have good machinability and high strength.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
Thread Size | Thread Type | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Cast Iron | |||||||||||||
| 1 1/4"-4 | Acme | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.25" | Acme Class 2G | Rockwell B72 | Not Rated | 92428A670 | 000000 | ||
Ball Handles—Right-Hand Thread
 |
Handles fasten and position lead screw components. Handles are easy to grip and tighten by hand for quick assembly and disassembly.
Cast Iron—Cast iron components have good machinability and high strength.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
Thread Size | Thread Type | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Cast Iron | |||||||||||||
| 1 1/4"-4 | Acme | 1 1/8" | 9 1/2" | 1 | 1:1 | 0.25" | Acme Class 2G | Rockwell B72 | Not Rated | 92428A150 | 000000 | ||
Precision Acme 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, please select components that have the same thread direction, thread size, and number of thread starts.
Lead Screws—Right-Hand Thread
|  |
Right-Hand Threads |
1018 Low-Carbon Steel—Carbon steel lead screws and flanges have good machinability.
Black-Oxide 4140 Alloy Steel—Black-oxide alloy steel lead screws are hard and strong. They have mild corrosion resistance and a dark surface color.
304 Stainless Steel—304 stainless steel lead screws have 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 | Lg. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength, psi | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1018 Low-Carbon Steel | |||||||||||||
| 1 1/4"-4 | 3 ft. | Acme | 1:1 | 1 | 0.25" | ±0.009"/1 ft. | Acme Class 2C | Brinell 126 | 64,000 | 99030A041 | 000000 | ||
| 1 1/4"-4 | 6 ft. | Acme | 1:1 | 1 | 0.25" | ±0.009"/1 ft. | Acme Class 2C | Brinell 126 | 64,000 | 99030A141 | 000000 | ||
Black-Oxide 4140 Alloy Steel | |||||||||||||
| 1 1/4"-4 | 3 ft. | Acme | 1:1 | 1 | 0.25" | ±0.009"/1 ft. | Acme Class 2C | Brinell 271 | 125,000 | 98940A649 | 000000 | ||
| 1 1/4"-4 | 6 ft. | Acme | 1:1 | 1 | 0.25" | ±0.009"/1 ft. | Acme Class 2C | Brinell 271 | 125,000 | 98940A123 | 000000 | ||
304 Stainless Steel | |||||||||||||
| 1 1/4"-4 | 18" | Acme | 1:1 | 1 | 0.25" | ±0.0003"/1" | Acme Class 2C | Brinell 170 | 31,000 | 90497A140 | 000000 | ||
| 1 1/4"-4 | 3 ft. | Acme | 1:1 | 1 | 0.25" | ±0.0003"/1" | Acme Class 2C | Brinell 170 | 31,000 | 90497A150 | 000000 | ||
| 1 1/4"-4 | 6 ft. | Acme | 1:1 | 1 | 0.25" | ±0.0003"/1" | Acme Class 2C | Brinell 170 | 31,000 | 90497A160 | 000000 | ||
Lead Screws—Left-Hand Thread
|  |
Left-Hand Threads |
1018 Low-Carbon Steel—Carbon steel lead screws and flanges have good machinability.
Black-Oxide 4140 Alloy Steel—Black-oxide alloy steel lead screws are hard and strong. They have mild corrosion resistance and a dark surface color.
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., ft. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength, psi | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1018 Low-Carbon Steel | |||||||||||||
| 1 1/4"-4 | 3 | Acme | 1:1 | 1 | 0.25" | ±0.009"/1 ft. | Acme Class 2C | Brinell 126 | 64,000 | 99030A441 | 000000 | ||
| 1 1/4"-4 | 6 | Acme | 1:1 | 1 | 0.25" | ±0.009"/1 ft. | Acme Class 2C | Brinell 126 | 64,000 | 99030A541 | 000000 | ||
Black-Oxide 4140 Alloy Steel | |||||||||||||
| 1 1/4"-4 | 3 | Acme | 1:1 | 1 | 0.25" | ±0.009"/1 ft. | Acme Class 2C | Brinell 271 | 125,000 | 98940A749 | 000000 | ||
| 1 1/4"-4 | 6 | Acme | 1:1 | 1 | 0.25" | ±0.009"/1 ft. | Acme Class 2C | Brinell 271 | 125,000 | 98940A423 | 000000 | ||
Round Nuts—Right-Hand Thread
 |
Iron—Iron nuts have good machinability and high strength.
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 | Thread Fit | Hardness | Tensile Strength | Dynamic Thrust Load Cap. | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron | ||||||||||||||
| 1 1/4"-4 | 2 1/2" | 3.734" | Acme | 1:1 | 1 | 0.25" | Acme Class 2C | Brinell 217 | Not Rated | Not Rated | 95365A507 | 0000000 | ||
932 Bearing Bronze | ||||||||||||||
| 1 1/4"-4 | 2 1/2" | 3.734" | Acme | 1:1 | 1 | 0.25" | Acme Class 2C | Brinell 65 | Not Rated | 7,850 lb. | 1343K117 | 000000 | ||
Round Nuts—Left-Hand Thread
|
Iron—Iron nuts have good machinability and high strength.
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 | Thread Fit | Hardness | Tensile Strength | Dynamic Thrust Load Cap. | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron | ||||||||||||||
| 1 1/4"-4 | 2 1/2" | 3.734" | Acme | 1:1 | 1 | 0.25" | Acme Class 2C | Brinell 217 | Not Rated | Not Rated | 95365A607 | 0000000 | ||
932 Bearing Bronze | ||||||||||||||
| 1 1/4"-4 | 2 1/2" | 3.734" | Acme | 1:1 | 1 | 0.25" | Acme Class 2C | Brinell 65 | Not Rated | 7,850 lb. | 1343K217 | 000000 | ||
Externally Threaded Nuts—Right-Hand Thread
 |
Combine externally threaded nuts with a flange to create a custom flange nut.
673 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.
External Thread | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Lg. | Dia. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn | Size | Lg. | Thread Fit | Hardness | Tensile Strength | Dynamic Thrust Load Cap. | Each | |||
673 Bronze | ||||||||||||||||
| 1 1/4"-4 | 1 3/4" | 2.125" | Acme | 1:1 | 1 | 0.25" | 1 31/32"-18 | 13/16" | Acme Class 2C | Brinell 70 | Not Rated | Not Rated | 95072A117 | 0000000 | ||
Externally Threaded Nuts—Left-Hand Thread
|
Combine externally threaded nuts with a flange to create a custom flange nut.
673 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.
External Thread | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Lg. | Dia. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn | Size | Lg. | Thread Fit | Hardness | Tensile Strength | Dynamic Thrust Load Cap. | Each | |||
673 Bronze | ||||||||||||||||
| 1 1/4"-4 | 1 3/4" | 2.125" | Acme | 1:1 | 1 | 0.25" | 1 31/32"-18 | 13/16" | Acme Class 2C | Brinell 70 | Not Rated | Not Rated | 95072A217 | 0000000 | ||
Flanges
 |
 |
Flange Thread Size | Flange Dia. | Flange Thk. | Bolt Circle Dia. | Flange Hardness | Each | |||
|---|---|---|---|---|---|---|---|---|
1117 Carbon Steel | ||||||||
| 1 31/32"-18 | 4 13/64" | 53/64" | 3 7/16" | Brinell 156 | 95082A645 | 000000 | ||
Black-Oxide 1117 Carbon Steel | ||||||||
| 1 31/32"-18 | 4 13/64" | 53/64" | 3 7/16" | Brinell 135 | 1329K105 | 00000 | ||
303 Stainless Steel | ||||||||
| 1 31/32"-18 | 4 13/64" | 53/64" | 3 7/16" | Brinell 140 | 1329K15 | 000000 | ||
