Selecting Compatible Lead Screws and Nuts
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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.
360 brass components have excellent machinability and good corrosion resistance. 18-8 stainless steel components have good corrosion resistance.
Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
For technical drawings and 3-D models, click on a part number.
Hex nuts fasten and position lead screw components.
| Thread Size  | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Specifications Met | Each | |
360 Brass | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 1/2"-4 | 1 1/2" | 2 1/4" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | ASTM B16 | 000000000 | 000000 |
18-8 Stainless Steel | ||||||||||
| 1 1/2"-4 | 1 15/32" | 2 1/4" | 1 | 1:1 | 0.25" | Class 2G | Not Rated | __ | 000000000 | 000000 |
| 1 1/2"-5 | 1 1/2" | 2 1/4" | 1 | 1:1 | 0.2" | Class 2G | Rockwell B97 | __ | 000000000 | 000000 |
Hex nuts fasten and position lead screw components.
| Thread Size | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Specifications Met | Each | |
360 Brass | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 1/2"-4 | 1 1/2" | 2 1/4" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B75 | ASTM B16 | 000000000 | 000000 |
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.
| Thread Size | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Specifications Met | Each | |
360 Brass | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 1/2"-4 | 1 1/2" | 2 1/4" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 000000 |
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.
| Thread Size | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Specifications Met | Each | |
360 Brass | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 1/2"-4 | 1 1/2" | 2 1/4" | 1 | 1:1 | 0.25" | Class 2G | Rockwell B55 | ASTM B16 | 000000000 | 000000 |
Color-Coded Horseshoe Shims
These shims are color-coded by thickness for easy identification. The horseshoe design fits around screws. Use them to align cabinets, doors, and windows. Shims are made of plastic to resist moisture and prevent rot.
For technical drawings and 3-D models, click on a part number.
Slot | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Wd. | Dp. | For Max. Screw Size | Material | Temperature Range | Pkg. Qty. | Pkg. | |
0.063" Thick. (-0.032" to 0.032" Tolerance)—Blue | |||||||||
| 3" | 2 1/4" | 13/16" | 2 1/4" | 3/4" | Polypropylene Plastic | Not Rated | 100 | 0000000 | 000000 |
1/8" Thick. (-0.032" to 0.032" Tolerance)—Red | |||||||||
| 3" | 2 1/4" | 13/16" | 2 1/4" | 3/4" | Polypropylene Plastic | Not Rated | 100 | 0000000 | 00000 |
1/4" Thick. (-0.032" to 0.032" Tolerance)—Black | |||||||||
| 3" | 2 1/4" | 13/16" | 2 1/4" | 3/4" | Polypropylene Plastic | Not Rated | 50 | 0000000 | 00000 |
Horseshoe Shims
Align cabinets, doors, and windows with these shims. The horseshoe design fits around screws. Shims are made of stainless steel to resist corrosion.
For technical drawings and 3-D models, click on a part number.
Slot | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Wd. | Dp. | For Max. Screw Size | Material | Minimum Hardness | Magnetic Properties | Each | |
0.063" Thick. (-0.01" to 0.01" Tolerance) | |||||||||
| 3" | 2 1/4" | 13/16" | 2 1/4" | 3/4" | 316 Stainless Steel | Rockwell B83 | May Be Mildly Magnetic | 0000000 | 000000 |
1/8" Thick. (-0.01" to 0.01" Tolerance) | |||||||||
| 3" | 2 1/4" | 13/16" | 2 1/4" | 3/4" | 316 Stainless Steel | Rockwell B83 | May Be Mildly Magnetic | 0000000 | 00000 |
1/4" Thick. (-0.01" to 0.01" Tolerance) | |||||||||
| 3" | 2 1/4" | 13/16" | 2 1/4" | 3/4" | 316 Stainless Steel | Rockwell B83 | May Be Mildly Magnetic | 0000000 | 00000 |