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About Set Screws
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Ultra-Fine-Thread Ball-Point Set Screws
Fine threads give you precise control. A rolling ball swivels 360° to minimize surface damage and allow for slight adjustments without loosening the screw. Made from 18-8 stainless steel, these set screws are chemical resistant and may be mildly magnetic. To install screws in unthreaded holes, use an optional threaded insert (sold separately). Length listed is the overall length.
For technical drawings and 3-D models, click on a part number.
18-8 Stainless Steel Set Screws
Tip | ||||||
|---|---|---|---|---|---|---|
| Lg. | Dia. | Material | Drive Size | Hardness | Each | |
6-80 | ||||||
| 3/8" | 0.094" | Alloy Steel | 5/64" | Not Rated | 000000000 | 000000 |
| 7/16" | 0.094" | Alloy Steel | 5/64" | Not Rated | 000000000 | 00000 |
| 1/2" | 0.094" | Alloy Steel | 5/64" | Not Rated | 000000000 | 00000 |
| 37/64" | 0.094" | Alloy Steel | 5/64" | Not Rated | 000000000 | 00000 |
| 3/4" | 0.094" | Alloy Steel | 5/64" | Not Rated | 000000000 | 00000 |
| 7/8" | 0.094" | Alloy Steel | 5/64" | Not Rated | 000000000 | 00000 |
| 1" | 0.094" | Alloy Steel | 5/64" | Not Rated | 000000000 | 00000 |
| 1 1/8" | 0.094" | Alloy Steel | 5/64" | Not Rated | 000000000 | 00000 |
| 1 1/4" | 0.094" | Alloy Steel | 5/64" | Not Rated | 000000000 | 00000 |
| 1 1/2" | 0.094" | Alloy Steel | 5/64" | Not Rated | 000000000 | 00000 |
3/16"-100 | ||||||
| 3/8" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 0000 |
| 1/2" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 0000 |
| 3/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 0000 |
| 1" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 0000 |
| 1 1/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 0000 |
| 1 1/2" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 0000 |
| 1 3/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 0000 |
| 2" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 0000 |
1/4"-80 | ||||||
| 3/8" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 0000 |
| 1/2" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 0000 |
| 3/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 0000 |
| 1" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 0000 |
| 1 1/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 0000 |
| 1 1/2" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 0000 |
| 1 3/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 0000 |
| 2" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 2 1/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 2 1/2" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 2 3/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 3" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 3 1/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 3 1/2" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 3 3/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
1/4"-100 | ||||||
| 3/8" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 1/2" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 3/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 1" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 1 1/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 1 1/2" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 1 3/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 2" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 2 1/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 2 1/2" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 2 3/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 3" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 3 1/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 3 1/2" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 3 3/4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
| 4" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
Metric 18-8 Stainless Steel Set Screws
Tip | ||||||
|---|---|---|---|---|---|---|
| Lg., mm | Dia., mm | Material | Drive Size, mm | Hardness | Each | |
M2.5 × 0.2 mm | ||||||
| 8 | 1.5 | Alloy Steel | 1.5 | Not Rated | 000000000 | 000000 |
| 10 | 1.5 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 12 | 1.5 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 15 | 1.5 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 20 | 1.5 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 25 | 1.5 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
M3 × 0.2 mm | ||||||
| 8 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 10 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 12 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 15 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 20 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 25 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 30 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 33 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 36 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 39 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
M3 × 0.25 mm | ||||||
| 8 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 10 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 12 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 15 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 20 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 25 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 30 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 33 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 36 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
| 39 | 1.6 | Alloy Steel | 1.5 | Not Rated | 000000000 | 00000 |
Brass Optional Threaded Inserts
Flange | ||||||
|---|---|---|---|---|---|---|
| Installed Lg. | Dia. | Thick. | For Max. Hole Dia. | Drill Bit Size | Each | |
6-80 | ||||||
| 0.25" | 1/4" | 0.03" | 7/32" | 7/32" | 000000000 | 00000 |
| 0.375" | 1/4" | 0.03" | 7/32" | 7/32" | 000000000 | 0000 |
3/16"-100 | ||||||
| 0.313" | 0.29" | 0.01" | 1/4" | 1/4" | 000000000 | 0000 |
| 0.438" | 0.29" | 0.01" | 1/4" | 1/4" | 000000000 | 0000 |
| 0.625" | 0.29" | 0.01" | 1/4" | 1/4" | 000000000 | 0000 |
| 0.75" | 0.29" | 0.01" | 1/4" | 1/4" | 000000000 | 0000 |
1/4"-80 | ||||||
| 0.313" | 0.352" | 0.01" | 5/16" | 5/16" | 000000000 | 0000 |
| 0.438" | 0.352" | 0.01" | 5/16" | 5/16" | 000000000 | 0000 |
| 0.625" | 0.352" | 0.01" | 5/16" | 5/16" | 000000000 | 0000 |
| 0.75" | 0.352" | 0.01" | 5/16" | 5/16" | 000000000 | 0000 |
1/4"-100 | ||||||
| 0.313" | 0.352" | 0.01" | 5/16" | 5/16" | 000000000 | 0000 |
| 0.438" | 0.352" | 0.01" | 5/16" | 5/16" | 000000000 | 0000 |
| 0.625" | 0.352" | 0.01" | 5/16" | 5/16" | 000000000 | 0000 |
| 0.75" | 0.352" | 0.01" | 5/16" | 5/16" | 000000000 | 0000 |
Metric Brass Optional Threaded Inserts
Flange | ||||||
|---|---|---|---|---|---|---|
| Installed Lg., mm | Dia., mm | Thick., mm | For Max. Hole Dia., mm | Drill Bit Size, mm | Each | |
M2.5 × 0.2 mm | ||||||
| 7 | 4.5 | 0.5 | 4 | 4 | 000000000 | 00000 |
M3 × 0.2 mm | ||||||
| 5 | 4.95 | 0.25 | 4.5 | 4.5 | 000000000 | 0000 |
| 7 | 4.95 | 0.25 | 4.5 | 4.5 | 000000000 | 0000 |
| 9 | 4.95 | 0.25 | 4.5 | 4.5 | 000000000 | 0000 |
M3 × 0.25 mm | ||||||
| 5 | 4.95 | 0.25 | 4.5 | 4.5 | 000000000 | 0000 |
| 7 | 4.95 | 0.25 | 4.5 | 4.5 | 000000000 | 0000 |
| 9 | 4.95 | 0.25 | 4.5 | 4.5 | 000000000 | 0000 |