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DFARS Specialty Metals
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.
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., lb. | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron | ||||||||||||||
| 1 1/2"-4 | 3" | 4.469" | Acme | 1:1 | 1 | 0.25" | Acme Class 2C | Brinell 217 | Not Rated | Not Rated | 95365A147 | 0000000 | ||
932 Bearing Bronze | ||||||||||||||
| 1 1/2"-4 | 3" | 4.469" | Acme | 1:1 | 1 | 0.25" | Acme Class 2C | Brinell 65 | Not Rated | 12,000 | 1343K118 | 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., lb. | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron | ||||||||||||||
| 1 1/2"-4 | 3" | 4.469" | Acme | 1:1 | 1 | 0.25" | Acme Class 2C | Brinell 217 | Not Rated | Not Rated | 95365A347 | 0000000 | ||
932 Bearing Bronze | ||||||||||||||
| 1 1/2"-4 | 3" | 4.469" | Acme | 1:1 | 1 | 0.25" | Acme Class 2C | Brinell 65 | Not Rated | 12,000 | 1343K218 | 000000 | ||
Flange Nuts—Right-Hand Thread
 |
Flange nuts have wide, machinable surfaces for custom mounting.
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.
Flange | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Lg. | Dia. | Dia. | Thk. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lb. | Each | |||
932 Bearing Bronze | ||||||||||||||||
| 1"-4 | 3" | 1.625" | 3" | 5/8" | Acme | 1:1 | 1 | 0.25" | Acme Class 2C | Brinell 65 | 35,000 | 5,000 | 97790A150 | 0000000 | ||
| 1"-5 | 3" | 1.625" | 3" | 5/8" | Acme | 1:1 | 1 | 0.2" | Acme Class 2C | Brinell 65 | 35,000 | 5,000 | 97790A160 | 000000 | ||
| 1"-10 | 3" | 1.625" | 3" | 5/8" | Acme | 1:1 | 1 | 0.1" | Acme Class 2C | Brinell 65 | 35,000 | 5,000 | 97790A170 | 000000 | ||
Platform Nuts—Left-Hand Thread
 |
Platform nuts have wide, machinable surfaces for custom mounting.
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. | Wd. | Ht. | Ctr. Ht. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength | Dynamic Thrust Load Cap., lb. | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
932 Bearing Bronze | ||||||||||||||||
| 1"-4 | 3" | 3" | 1 15/16" | 1 1/8" | Acme | 1:1 | 1 | 0.25" | Acme Class 2C | Brinell 65 | Not Rated | 5,000 | 1710K41 | 0000000 | ||
| 1"-5 | 3" | 3" | 1 15/16" | 1 1/8" | Acme | 1:1 | 1 | 0.2" | Acme Class 2C | Brinell 65 | Not Rated | 5,000 | 1710K45 | 000000 | ||
| 1"-6 | 3" | 3" | 1 15/16" | 1 1/8" | Acme | 1:1 | 1 | 0.167" | Acme Class 2C | Brinell 65 | Not Rated | 5,000 | 1710K48 | 000000 | ||
| 1"-10 | 3" | 3" | 1 15/16" | 1 1/8" | Acme | 1:1 | 1 | 0.1" | Acme Class 2C | Brinell 65 | Not Rated | 5,000 | 1710K52 | 000000 | ||
Platform Nuts—Right-Hand Thread
|
Platform nuts have wide, machinable surfaces for custom mounting.
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. | Wd. | Ht. | Ctr. Ht. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength | Dynamic Thrust Load Cap., lb. | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
932 Bearing Bronze | ||||||||||||||||
| 1"-4 | 3" | 3" | 1 15/16" | 1 1/8" | Acme | 1:1 | 1 | 0.25" | Acme Class 2C | Brinell 65 | Not Rated | 5,000 | 1710K1 | 0000000 | ||
| 1"-5 | 3" | 3" | 1 15/16" | 1 1/8" | Acme | 1:1 | 1 | 0.2" | Acme Class 2C | Brinell 65 | Not Rated | 5,000 | 1710K5 | 000000 | ||
| 1"-6 | 3" | 3" | 1 15/16" | 1 1/8" | Acme | 1:1 | 1 | 0.167" | Acme Class 2C | Brinell 65 | Not Rated | 5,000 | 1710K8 | 000000 | ||
| 1"-10 | 3" | 3" | 1 15/16" | 1 1/8" | Acme | 1:1 | 1 | 0.1" | Acme Class 2C | Brinell 65 | Not Rated | 5,000 | 1710K12 | 000000 | ||
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.
Hex-Head Screws—Right-Hand Thread
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Hex head screws fasten heavy loads. They’re generally shorter than lead screws and can be tightened with a wrench. Length is measured from under the head.
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.
Head | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Thread Type | Lg. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Lg. | Wd. | Ht. | Thread Fit | Fastener Strength Grade/Class | Hardness | Tensile Strength, psi | Each | |||
Carbon Steel | ||||||||||||||||
| 1/4"-16 | Acme | 3" | 1 | 1:1 | 0.063" | 2 1/2" to 3" | 7/16" | 5/32" | Acme Class 2G | SAE Grade 5 | Rockwell C19 | 105,000 | 93097A110 | 000000 | ||
| 3/8"-12 | Acme | 3" | 1 | 1:1 | 0.083" | 2 1/2" to 3" | 9/16" | 15/64" | Acme Class 2G | SAE Grade 5 | Rockwell C19 | 105,000 | 93097A140 | 00000 | ||
| 1/2"-10 | Acme | 3" | 1 | 1:1 | 0.1" | 2 1/2" to 3" | 3/4" | 5/16" | Acme Class 2G | SAE Grade 5 | Rockwell C19 | 105,000 | 93097A170 | 00000 | ||
| 5/8"-8 | Acme | 3" | 1 | 1:1 | 0.125" | 2 1/2" to 3" | 15/16" | 25/64" | Acme Class 2G | SAE Grade 5 | Rockwell C19 | 105,000 | 93097A210 | 00000 | ||
| 3/4"-6 | Acme | 3" | 1 | 1:1 | 0.167" | 2 1/2" to 3" | 1 1/8" | 15/32" | Acme Class 2G | SAE Grade 5 | Rockwell C19 | 105,000 | 93097A240 | 00000 | ||
| 7/8"-6 | Acme | 3" | 1 | 1:1 | 0.167" | 2 1/2" to 3" | 1 5/16" | 35/64" | Acme Class 2G | SAE Grade 5 | Rockwell C19 | 105,000 | 93097A270 | 00000 | ||
| 1"-5 | Acme | 3" | 1 | 1:1 | 0.2" | 2 1/2" to 3" | 1 1/2" | 39/64" | Acme Class 2G | SAE Grade 5 | Rockwell C19 | 105,000 | 93097A310 | 00000 | ||
| 1 1/4"-5 | Acme | 3" | 1 | 1:1 | 0.2" | 2 1/2" to 3" | 1 7/8" | 25/32" | Acme Class 2G | SAE Grade 5 | Rockwell C19 | 105,000 | 93097A340 | 00000 | ||
| 1 1/2"-4 | Acme | 3" | 1 | 1:1 | 0.25" | 2 1/2" to 3" | 2 1/4" | 15/16" | Acme Class 2G | SAE Grade 5 | Rockwell C19 | 105,000 | 93097A370 | 00000 | ||
Metric Precision 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, select components that have the same thread direction, size, and number of thread starts.
Round Nuts—Right-Hand Thread
 |
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 | Dynamic Thrust Load Cap., lb. | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
932 Bearing Bronze | |||||||||||||||
| 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 | 000000 | ||
Fast-Travel Ball Screws and Nuts
 |  |  |
Ball Nuts, Externally Threaded Nut, Style D | Flange Nut Ball Nuts Style G |
Externally Threaded Ball Nuts—Right-Hand Threaded
|
Style D |
Black-Oxide Alloy Steel—Black-oxide alloy steel ball nuts have mild corrosion resistance.
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.
Style | Thread Size | Lg. | Wd. | Ht. | No. of Thread Starts | Travel Distance per Turn | External Thread Size | Hardness | Dynamic Thrust Load Cap., lb. | Max. Backlash | Temp. Range, ° F | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Black-Oxide Alloy Steel | |||||||||||||||
| D | 1"-4 | 3" | 1 1/2" | 1 1/2" | 4 | 1" | 1 9/16"-18 | Rockwell C56 | 2,300 | 0.015" | -65 to 300 | 3405N468 | 0000000 | ||
Flange Ball Nuts—Right-Hand Threaded
|
Style G |
 |
 |
Black-Oxide Alloy Steel—Black-oxide alloy steel ball nuts have mild corrosion resistance.
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.
Flange | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Style | Thread Size | Lg. | Wd. | Ht. | Dia. | Thk. | No. of Thread Starts | Travel Distance per Turn | Bolt Circle Dia. | Hardness | Dynamic Thrust Load Cap., lb. | Max. Backlash | Temp. Range, ° F | Each | |||
Black-Oxide Alloy Steel | |||||||||||||||||
| G | 1"-4 | 3" | 1 1/2" | 1 1/2" | 3 15/64" | 5/8" | 4 | 1" | 2 3/4" | Rockwell C56 | 2,300 | 0.015" | -65 to 300 | 3405N406 | 0000000 | ||
Ball Screws and Nuts
 |  |
A |
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.
Externally Threaded Ball Nuts—Right-Hand Threaded
|
A |
Black-Oxide Alloy Steel—Black-oxide alloy steel ball nuts have mild corrosion resistance.
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.
Style | Thread Size | Lg. | Dia. | No. of Thread Starts | Travel Distance per Turn | External Thread Size | Hardness | Dynamic Thrust Load Cap., lb. | Max. Backlash | Temp. Range, ° F | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Black-Oxide Alloy Steel | ||||||||||||||
| A | 1 1/2"-4 | 3" | 2 3/32" | 1 | 0.25" | 1 31/32"-18 | Rockwell C56 | 4,250 | 0.015" | -65 to 300 | 3405N462 | 0000000 | ||
