Mount Type Mount Type |
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| Threaded Stud | Clamp On |
Thread Direction Thread Direction |
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| Right Hand | Left Hand |
Threading Threading |
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 | Fully Threaded |
 | Partially Threaded |
Tensile Strength Tensile Strength |
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For Screw Head Type For Screw Head Type |
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Hardness Hardness |
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About Thumb Screw and Binding Post Materials
More
Threaded-Stud Knobs
Mount these knobs into a threaded hole. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.
Aluminum knobs have mild corrosion resistance, are lightweight, and are nonmagnetic.
For technical drawings and 3-D models, click on a part number.
Head | Hub | Each | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch | Stud Lg. | Dia. | Ht. | Dia. | Ht. | Stud Material | 1-9 | 10-Up | |
Style 14—Four Arm Grip | ||||||||||
Aluminum | ||||||||||
| 1/4"-20 | __ | 1 3/4" | 1 1/2" | 3/8" | 5/8" | 1/2" | Steel | 0000000 | 00000 | 00000 |
| 1/4"-20 | __ | 1 3/4" | 1 1/2" | 1/2" | 5/8" | 3/8" | Steel | 00000000 | 0000 | 0000 |
| 1/4"-20 | __ | 3" | 1 1/2" | 3/8" | 5/8" | 1/2" | Steel | 0000000 | 0000 | 0000 |
| 1/4"-20 | __ | 3" | 1 1/2" | 1/2" | 5/8" | 3/8" | Steel | 00000000 | 0000 | 0000 |
| 5/16"-18 | __ | 1 3/4" | 2" | 3/8" | 3/4" | 5/8" | Steel | 0000000 | 0000 | 0000 |
| 5/16"-18 | __ | 1 3/4" | 2" | 1/2" | 13/16" | 1/2" | Steel | 00000000 | 0000 | 0000 |
| 5/16"-18 | __ | 3" | 2" | 3/8" | 3/4" | 5/8" | Steel | 0000000 | 0000 | 0000 |
| 5/16"-18 | __ | 3" | 2" | 1/2" | 13/16" | 1/2" | Steel | 00000000 | 00000 | 0000 |
| 3/8"-16 | __ | 1 3/4" | 2" | 3/8" | 3/4" | 5/8" | Steel | 0000000 | 0000 | 0000 |
| 3/8"-16 | __ | 1 3/4" | 2 1/2" | 9/16" | 1" | 9/16" | Steel | 000000000 | 00000 | 00000 |
| 3/8"-16 | __ | 3" | 2" | 3/8" | 3/4" | 5/8" | Steel | 0000000 | 0000 | 0000 |
| 3/8"-16 | __ | 3" | 2 1/2" | 9/16" | 1" | 9/16" | Steel | 000000000 | 00000 | 00000 |
| 1/2"-13 | __ | 1 3/4" | 2 1/2" | 1/2" | 1 1/8" | 1" | Steel | 0000000 | 00000 | 0000 |
| 1/2"-13 | __ | 1 3/4" | 2 1/2" | 9/16" | 1" | 9/16" | Steel | 000000000 | 00000 | 00000 |
| 1/2"-13 | __ | 3" | 2 1/2" | 1/2" | 1 1/8" | 1" | Steel | 0000000 | 00000 | 00000 |
| 1/2"-13 | __ | 3" | 2 1/2" | 9/16" | 1" | 9/16" | Steel | 000000000 | 00000 | 00000 |
| 5/8"-11 | __ | 1 3/4" | 2 1/2" | 1/2" | 1 1/8" | 1" | Steel | 0000000 | 00000 | 00000 |
| 5/8"-11 | __ | 1 3/4" | 3" | 5/8" | 1 1/4" | 5/8" | Steel | 00000000 | 00000 | 00000 |
| 5/8"-11 | __ | 3" | 2 1/2" | 1/2" | 1 1/8" | 1" | Steel | 0000000 | 00000 | 00000 |
| 5/8"-11 | __ | 3" | 3" | 5/8" | 1 1/4" | 5/8" | Steel | 00000000 | 00000 | 00000 |
| M6 | 1mm | 45mm | 38mm | 12mm | 16mm | 10mm | Steel | 00000000 | 0000 | 0000 |
| M6 | 1mm | 76mm | 38mm | 12mm | 16mm | 10mm | Steel | 00000000 | 0000 | 0000 |
| M8 | 1.25mm | 45mm | 51mm | 12mm | 21mm | 13mm | Steel | 00000000 | 00000 | 0000 |
| M8 | 1.25mm | 76mm | 51mm | 12mm | 21mm | 13mm | Steel | 00000000 | 00000 | 0000 |
| M10 | 1.5mm | 45mm | 64mm | 15mm | 25mm | 14mm | Steel | 00000000 | 00000 | 00000 |
| M10 | 1.5mm | 76mm | 64mm | 15mm | 25mm | 14mm | Steel | 00000000 | 00000 | 00000 |
| M12 | 1.75mm | 45mm | 64mm | 15mm | 25mm | 14mm | Steel | 00000000 | 00000 | 00000 |
| M12 | 1.75mm | 76mm | 64mm | 15mm | 25mm | 14mm | Steel | 00000000 | 00000 | 00000 |
Palm-Grip Threaded-Stud Knobs
The domed top allows you to firmly hold these knobs in the palm of your hand to position, tighten, and hold fixtures, equipment, and machinery. Mount them into a threaded hole. Made of aluminum, all have mild corrosion resistance, are lightweight, and are nonmagnetic.
For technical drawings and 3-D models, click on a part number.
Left-Hand Threaded-Stud Knobs
Knobs have left-hand threads; they're used in applications where counterclockwise motion can loosen common right-hand threads. Mount them into a threaded hole to position, tighten, and hold fixtures, equipment, and machinery.
Aluminum knobs have mild corrosion resistance, are lightweight, and are nonmagnetic.
For technical drawings and 3-D models, click on a part number.
Oversized-Grip Screw-Head Mount Knobs
Convert screws into knobs so large you can grip them with heavy work gloves. Slip these knobs onto a hex or socket head screw and tighten the set screw to secure. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery. Made of aluminum, all have mild corrosion resistance, are lightweight, and are nonmagnetic.
For technical drawings and 3-D models, click on a part number.
Head | For Hex Head Screws | For Socket Head Screws | ||||
|---|---|---|---|---|---|---|
| For Screw Size | Dia. | Ht. | Each | Each | ||
Knurled Grip | ||||||
Aluminum | ||||||
| 1/4" | 2 3/4" | 3/8" | 000000000 | 000000 | 000000000 | 000000 |
| 3/8" | 2 3/4" | 3/8" | 000000000 | 00000 | 000000000 | 00000 |
| 1/2" | 2 3/4" | 3/8" | 000000000 | 00000 | 000000000 | 00000 |
| 5/8" | 2 3/4" | 3/8" | 000000000 | 00000 | 000000000 | 00000 |
| 3/4" | 2 3/4" | 3/8" | 000000000 | 00000 | 000000000 | 00000 |
| 1" | 2 3/4" | 3/8" | 000000000 | 00000 | 000000000 | 00000 |
Aluminum Flared-Collar Knurled-Head Thumb Screws
These thumb screws are lightweight, corrosion resistant in wet environments, and nonmagnetic. They have a slightly raised head and a decorative flared collar. The head is knurled for slip-resistant controlled adjustment. Length is measured from under the flange.
For technical drawings and 3-D models, click on a part number.
Head | Collar | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | Dia. | Ht. | Tensile Strength, psi | Hardness | Pkg. Qty. | Pkg. | |
6061 Aluminum | |||||||||
4-40 | |||||||||
| 5/16" | 3/8" | 3/16" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 00000 |
| 3/8" | 3/8" | 3/16" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 0000 |
| 7/16" | 3/8" | 3/16" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 0000 |
6-32 | |||||||||
| 3/8" | 3/8" | 3/16" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 0000 |
| 7/16" | 3/8" | 3/16" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 0000 |
| 1/2" | 3/8" | 3/16" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 0000 |
8-32 | |||||||||
| 3/8" | 7/16" | 3/16" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 0000 |
| 1/2" | 7/16" | 3/16" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 0000 |
| 5/8" | 7/16" | 3/16" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 0000 |
10-32 | |||||||||
| 3/8" | 7/16" | 3/16" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 0000 |
| 1/2" | 7/16" | 3/16" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 0000 |
| 5/8" | 7/16" | 3/16" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 0000 |
1/4"-20 | |||||||||
| 3/8" | 1/2" | 1/4" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 0000 |
| 1/2" | 1/2" | 1/4" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 0000 |
| 5/8" | 1/2" | 1/4" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 0000 |
| 3/4" | 1/2" | 1/4" | 3/8" | 1/8" | 40,000 | Rockwell B60 | 1 | 000000000 | 0000 |
Four-Arm Extended-Tip Thumb Screws
Also known as dog- and pilot-point thumb screws, insert the point into a drilled hole or slot to hold items in place. Arms provide a flat surface to push your fingers against. A black-oxide finish on the threads provides corrosion resistance in dry environments. Length is measured from under the collar.
Aluminum heads are lightweight and corrosion resistant in wet environments.
For technical drawings and 3-D models, click on a part number.
Tip | Head | Collar | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Thread Lg. | Dia. | Lg. | Wd. | Ht. | Material | Dia. | Ht. | Tensile Strength, psi | Hardness | Each | |
Black-Oxide Steel | ||||||||||||
1/4"-20 | ||||||||||||
| 2 1/2" | 2 1/4" | 1/8" | 1/8" | 1 1/8" | 3/4" | Aluminum | 1/2" | 3/8" | 70,000 | Rockwell C40 | 000000000 | 00000 |
5/16"-18 | ||||||||||||
| 2" | 1 3/4" | 3/16" | 5/32" | 1 1/2" | 7/8" | Aluminum | 19/32" | 1/2" | 70,000 | Rockwell C40 | 000000000 | 0000 |
3/8"-16 | ||||||||||||
| 2 1/16" | 1 3/4" | 1/4" | 3/16" | 2" | 1" | Aluminum | 11/16" | 5/8" | 70,000 | Rockwell C40 | 000000000 | 0000 |
| 2 9/16" | 2 1/4" | 1/4" | 3/16" | 2" | 1" | Aluminum | 11/16" | 5/8" | 70,000 | Rockwell C40 | 000000000 | 0000 |
| 3 1/16" | 2 3/4" | 1/4" | 3/16" | 2" | 1" | Aluminum | 11/16" | 5/8" | 70,000 | Rockwell C40 | 000000000 | 0000 |
1/2"-13 | ||||||||||||
| 2 9/16" | 2 1/4" | 11/32" | 1/4" | 2 1/2" | 1 1/2" | Aluminum | 1 1/16" | 1" | 70,000 | Rockwell C40 | 000000000 | 00000 |
| 3 1/16" | 2 3/4" | 11/32" | 1/4" | 2 1/2" | 1 1/2" | Aluminum | 1 1/16" | 1" | 70,000 | Rockwell C40 | 000000000 | 00000 |
| 3 9/16" | 3 1/4" | 11/32" | 1/4" | 2 1/2" | 1 1/2" | Aluminum | 1 1/16" | 1" | 70,000 | Rockwell C40 | 000000000 | 00000 |