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Precision Acme Lead Screws and Nuts
 |
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 | |||||||||||||
| 1/4"-16 | 18" | Acme | 1:1 | 1 | 0.063" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 99030A981 | 000000 | ||
| 1/4"-20 | 18" | Acme | 1:1 | 1 | 0.05" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 99030A984 | 00000 | ||
| 3/8"-10 | 18" | Stub Acme | 1:1 | 1 | 0.1" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 99030A988 | 00000 | ||
| 3/8"-12 | 18" | Acme | 1:1 | 1 | 0.083" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 99030A992 | 00000 | ||
| 3/8"-16 | 18" | Acme | 1:1 | 1 | 0.063" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 99030A996 | 00000 | ||
| 1 1/2"-5 | 18" | Acme | 1:1 | 1 | 0.2" | ±0.0003"/1" | Acme Class 2C | Brinell 126 | 53,000 | 99030A181 | 00000 | ||
Black-Oxide 4140 Alloy Steel | |||||||||||||
| 1/4"-16 | 18" | Acme | 1:1 | 1 | 0.063" | ±0.0003"/1" | Acme Class 2C | Brinell 200 | 60,000 | 98940A191 | 00000 | ||
| 1/4"-20 | 18" | Acme | 1:1 | 1 | 0.05" | ±0.0003"/1" | Acme Class 2C | Brinell 200 | 60,000 | 99030A184 | 00000 | ||
| 3/8"-12 | 18" | Acme | 1:1 | 1 | 0.083" | ±0.009"/1 ft. | Acme Class 2C | Brinell 271 | 125,000 | 98940A303 | 00000 | ||
| 1/2"-10 | 18" | Acme | 1:1 | 1 | 0.1" | ±0.009"/1 ft. | Acme Class 2C | Brinell 271 | 125,000 | 98940A305 | 00000 | ||
| 5/8"-8 | 18" | Acme | 1:1 | 1 | 0.125" | ±0.009"/1 ft. | Acme Class 2C | Brinell 271 | 125,000 | 98940A306 | 00000 | ||
| 3/4"-6 | 18" | Acme | 1:1 | 1 | 0.167" | ±0.009"/1 ft. | Acme Class 2C | Brinell 271 | 125,000 | 98940A307 | 00000 | ||
| 3/4"-8 | 18" | Acme | 1:1 | 1 | 0.125" | ±0.0003"/1" | Acme Class 2C | Brinell 200 | 60,000 | 98940A194 | 00000 | ||
| 3/4"-16 | 18" | Acme | 1:1 | 1 | 0.063" | ±0.0003"/1" | Acme Class 2C | Brinell 200 | 60,000 | 98940A197 | 00000 | ||
| 1"-5 | 18" | Acme | 1:1 | 1 | 0.2" | ±0.009"/1 ft. | Acme Class 2C | Brinell 271 | 125,000 | 98940A308 | 00000 | ||
| 1 1/4"-5 | 18" | Acme | 1:1 | 1 | 0.2" | ±0.009"/1 ft. | Acme Class 2C | Brinell 271 | 125,000 | 98940A309 | 00000 | ||
| 1 1/2"-4 | 18" | Acme | 1:1 | 1 | 0.25" | ±0.009"/1 ft. | Acme Class 2C | Brinell 271 | 125,000 | 98940A401 | 00000 | ||
| 2"-4 | 18" | Acme | 1:1 | 1 | 0.25" | ±0.009"/1 ft. | Acme Class 2C | Brinell 271 | 125,000 | 98940A405 | 000000 | ||
304 Stainless Steel | |||||||||||||
| 1/4"-16 | 18" | Acme | 1:1 | 1 | 0.063" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 98980A965 | 00000 | ||
| 1/4"-20 | 18" | Acme | 1:1 | 1 | 0.05" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 98980A967 | 00000 | ||
| 3/8"-12 | 18" | Acme | 1:1 | 1 | 0.083" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 98980A976 | 00000 | ||
| 3/8"-16 | 18" | Acme | 1:1 | 1 | 0.063" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 98980A977 | 00000 | ||
| 5/8"-5 | 18" | Acme | 1:1 | 1 | 0.2" | ±0.0003"/1" | Acme Class 2C | Brinell 170 | 31,000 | 90497A110 | 00000 | ||
| 3/4"-8 | 18" | Acme | 1:1 | 1 | 0.125" | ±0.0003"/1" | Acme Class 2C | Brinell 170 | 31,000 | 90497A210 | 00000 | ||
| 1"-8 | 18" | Acme | 1:1 | 1 | 0.125" | ±0.0003"/1" | Acme Class 2C | Brinell 170 | 31,000 | 90497A240 | 000000 | ||
| 1 1/4"-4 | 18" | Acme | 1:1 | 1 | 0.25" | ±0.0003"/1" | Acme Class 2C | Brinell 170 | 31,000 | 90497A140 | 000000 | ||
| 1 1/2"-5 | 18" | Acme | 1:1 | 1 | 0.2" | ±0.0003"/1" | Acme Class 2C | Brinell 170 | 31,000 | 90497A170 | 000000 | ||
Fast-Travel Precision Acme Lead Screws and Nuts
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Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. The threads have a tight thread fit for accurate, repeatable starts and stops. Pair with a motor in automated motion and positioning applications. To ensure compatibility, please select components that have the same thread direction, thread size, and number of thread starts.
Lead Screws—Right-Hand Thread
 |
1018 Low-Carbon Steel—Carbon steel lead screws and flanges have good machinability.
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 | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1018 Low-Carbon Steel | |||||||||||||
| 1/4"-12 | 18" | Stub Acme | 4:1 | 4 | 0.333" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 99030A978 | 000000 | ||
| 1/4"-16 | 18" | Acme | 4:1 | 4 | 0.25" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 99030A982 | 00000 | ||
| 3/8"-8 | 18" | Stub Acme | 2:1 | 2 | 0.25" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 99030A986 | 00000 | ||
| 3/8"-8 | 18" | Stub Acme | 4:1 | 4 | 0.5" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 99030A987 | 00000 | ||
| 3/8"-10 | 18" | Stub Acme | 2:1 | 2 | 0.2" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 99030A989 | 0000 | ||
| 3/8"-12 | 18" | Acme | 2:1 | 2 | 0.167" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 99030A995 | 00000 | ||
304 Stainless Steel | |||||||||||||
| 1/4"-12 | 18" | Stub Acme | 4:1 | 4 | 0.333" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 98980A963 | 00000 | ||
| 3/8"-8 | 18" | Stub Acme | 2:1 | 2 | 0.25" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 98980A969 | 00000 | ||
| 3/8"-8 | 18" | Stub Acme | 4:1 | 4 | 0.5" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 98980A972 | 00000 | ||
| 3/8"-10 | 18" | Stub Acme | 2:1 | 2 | 0.2" | ±0.009"/1 ft. | Acme Class 2C | Not Rated | Not Rated | 98980A974 | 00000 | ||
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.
Lead Screws—Right-Hand Thread
 |
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 | Hardness | Tensile Strength, psi | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
303 Stainless Steel | ||||||||||||
| 9/64"-20.8 | 18" | Rounded Acme | 2:1 | 2 | 0.096" | ±0.0006"/1" | Brinell 160 | 90,000 | 6642K13 | 000000 | ||
| 5/32"-21.3 | 18" | Acme | 2:1 | 2 | 0.094" | ±0.0006"/1" | Brinell 160 | 90,000 | 6642K15 | 00000 | ||
| 3/16"-42.7 | 18" | Rounded Acme | 16:1 | 16 | 0.375" | ±0.0006"/1" | Brinell 160 | 90,000 | 6642K47 | 00000 | ||
| 7/32"-20.8 | 18" | Rounded Acme | 4:1 | 4 | 0.192" | ±0.0006"/1" | Brinell 160 | 90,000 | 6642K16 | 00000 | ||
Acme 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, thread size, and number of thread starts.
Lead Screws—Right-Hand Thread
|
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 | Lg. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Fastener Strength Grade/Class | Hardness | Tensile Strength, psi | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Zinc-Plated Carbon Steel | ||||||||||||||
| 3/4"-5 | Acme | 18" | 1 | 1:1 | 0.2" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 93255A233 | 000000 | ||
| 3/4"-6 | Acme | 18" | 1 | 1:1 | 0.167" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 93255A463 | 00000 | ||
| 1"-5 | Acme | 18" | 1 | 1:1 | 0.2" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 93255A505 | 00000 | ||
| 1 1/4"-5 | Acme | 18" | 1 | 1:1 | 0.2" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 93255A493 | 00000 | ||
| 1 1/2"-4 | Acme | 18" | 1 | 1:1 | 0.25" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 53,000 | ASTM A108 | 93255A649 | 000000 | ||
18-8 Stainless Steel | ||||||||||||||
| 3/4"-6 | Acme | 18" | 1 | 1:1 | 0.167" | Acme Class 2G | — | Rockwell B96 | Not Rated | — | 94330A480 | 00000 | ||
| 1"-5 | Acme | 18" | 1 | 1:1 | 0.2" | Acme Class 2G | — | Rockwell B96 | Not Rated | — | 94330A580 | 00000 | ||
| 1 1/4"-5 | Acme | 18" | 1 | 1:1 | 0.2" | Acme Class 2G | — | Rockwell B96 | Not Rated | — | 94330A680 | 000000 | ||
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, thread size, and number of thread starts.
Lead Screws—Right-Hand Thread
 |
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 | Hardness | Tensile Strength, psi | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
303 Stainless Steel | ||||||||||||
| 9/64"-20.8 | 18" | Rounded Acme | 1:1 | 1 | 0.048" | ±0.0006"/1" | Brinell 160 | 90,000 | 6642K12 | 000000 | ||
| 9/64"-41.7 | 18" | Rounded Acme | 1:1 | 1 | 0.024" | ±0.0006"/1" | Brinell 160 | 90,000 | 6642K11 | 00000 | ||
| 7/32"-20.8 | 18" | Rounded Acme | 1:1 | 1 | 0.048" | ±0.0006"/1" | Brinell 160 | 90,000 | 6642K14 | 00000 | ||
