System of Measurement System of Measurement |
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Thread Size Thread Size | Show |
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Thread Size Thread Size | Hide |
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Thread Type Thread Type |
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Thread Spacing Thread Spacing |
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Material Material |
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Tip Type Tip Type |
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![]() | Ball |
RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Thread Direction Thread Direction |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Tensile Strength Tensile Strength |
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Hardness Hardness |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Round-Head Thumb Screw Profile Round-Head ThumbScrew Profile |
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Thumb Screw Head Shape Thumb Screw Head Shape |
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![]() | Round |
Drive Size Drive Size |
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Drive Style Drive Style |
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Head Material Head Material |
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About Set Screws
More
About Thumb Screw and Binding Post Materials
More
Ultra-Fine-Thread Ball-Point Set Screws

Fine threads give you precise control. Made from 303 stainless steel, these set screws have good corrosion resistance. 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.
Tip | ||||||
---|---|---|---|---|---|---|
Lg. | Dia. | Material | Drive Size | Hardness | Each | |
1/4"-80 | ||||||
3/8" | 0.156" | Alloy Steel | 3/32" | Not Rated | 000000000 | 00000 |
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 | 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 |
Ultra-Fine-Thread Plastic-Head Thumb Screws
Fine threads give you precise control. They have a ball bearing tip that adjusts to angled surfaces and minimizes damage from surface contact. They have a lightweight and nonconductive plastic head and chemical-resistant 18-8 stainless steel threads. The head is knurled for slip-resistant controlled adjustment. Length is measured from under the head.
Optional threaded inserts can be used to install these thumb screws into existing holes.
For technical drawings and 3-D models, click on a part number.

Head | ||||||||
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Lg. | Tip Dia. | Dia. | Ht. | Max. Temperature, °F | Color | Tensile Strength, psi | Each | |
18-8 Stainless Steel | ||||||||
1/4"-80 | ||||||||
3/4" | 3/16" | 1/2" | 3/4" | 180° | Black | 60,000 | 000000000 | 000000 |
1" | 3/16" | 1/2" | 3/4" | 180° | Black | 60,000 | 000000000 | 0000 |
1 1/4" | 3/16" | 1/2" | 3/4" | 180° | Black | 60,000 | 000000000 | 0000 |
1 1/2" | 3/16" | 1/2" | 3/4" | 180° | Black | 60,000 | 000000000 | 0000 |
2" | 3/16" | 1/2" | 3/4" | 180° | Black | 60,000 | 000000000 | 00000 |
3" | 3/16" | 1/2" | 3/4" | 180° | Black | 60,000 | 000000000 | 00000 |
3 1/2" | 3/16" | 1/2" | 3/4" | 180° | Black | 60,000 | 000000000 | 00000 |
Ultra-Fine-Threaded Inserts for Plastic

Use these inserts to install fine-threaded screws in existing holes. Made from brass, they’re corrosion resistant, electrically conductive, and nonmagnetic. Press them into a drilled hole.
For technical drawings and 3-D models, click on a part number.