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Plastic-Head Thumb Screws with Hex Drive
Tighten these thumb screws by hand or with a hex key for more torque. 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.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Dia. | Ht. | Temperature Range, °F | Color | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel  | |||||||||
4-40 | |||||||||
| 9/32" | Fully Threaded | __ | 5/16" | 11/64" | 32° to 180° | Black | 25 | 000000000 | 000000 |
| 13/32" | Fully Threaded | __ | 5/16" | 11/64" | 32° to 180° | Black | 25 | 000000000 | 00000 |
| 17/32" | Fully Threaded | __ | 5/16" | 11/64" | 32° to 180° | Black | 25 | 000000000 | 00000 |
| 21/32" | Fully Threaded | __ | 5/16" | 11/64" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 25/32" | Fully Threaded | __ | 5/16" | 11/64" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 29/32" | Partially Threaded | 3/4" | 5/16" | 11/64" | 32° to 180° | Black | 10 | 000000000 | 0000 |
6-32 | |||||||||
| 9/32" | Fully Threaded | __ | 3/8" | 3/16" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 13/32" | Fully Threaded | __ | 3/8" | 3/16" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 17/32" | Fully Threaded | __ | 3/8" | 3/16" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 21/32" | Fully Threaded | __ | 3/8" | 3/16" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 25/32" | Fully Threaded | __ | 3/8" | 3/16" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 29/32" | Fully Threaded | __ | 3/8" | 3/16" | 32° to 180° | Black | 10 | 000000000 | 0000 |
8-32 | |||||||||
| 9/32" | Fully Threaded | __ | 1/2" | 7/32" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 13/32" | Fully Threaded | __ | 1/2" | 7/32" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 17/32" | Fully Threaded | __ | 1/2" | 7/32" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 21/32" | Fully Threaded | __ | 1/2" | 7/32" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 25/32" | Fully Threaded | __ | 1/2" | 7/32" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 29/32" | Fully Threaded | __ | 1/2" | 7/32" | 32° to 180° | Black | 10 | 000000000 | 0000 |
10-24 | |||||||||
| 3/8" | Fully Threaded | __ | 5/8" | 1/4" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | 5/8" | 1/4" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 5/8" | Fully Threaded | __ | 5/8" | 1/4" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | 5/8" | 1/4" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 7/8" | Fully Threaded | __ | 5/8" | 1/4" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 1 1/8" | Partially Threaded | 7/8" | 5/8" | 1/4" | 32° to 180° | Black | 10 | 000000000 | 00000 |
10-32 | |||||||||
| 3/8" | Fully Threaded | __ | 5/8" | 1/4" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | 5/8" | 1/4" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 5/8" | Fully Threaded | __ | 5/8" | 1/4" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | 5/8" | 1/4" | 32° to 180° | Black | 10 | 000000000 | 0000 |
| 7/8" | Fully Threaded | __ | 5/8" | 1/4" | 32° to 180° | Black | 10 | 000000000 | 00000 |
| 1 1/8" | Partially Threaded | 7/8" | 5/8" | 1/4" | 32° to 180° | Black | 10 | 000000000 | 00000 |
1/4"-20 | |||||||||
| 3/8" | Fully Threaded | __ | 3/4" | 5/16" | 32° to 180° | Black | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | 3/4" | 5/16" | 32° to 180° | Black | 10 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | 3/4" | 5/16" | 32° to 180° | Black | 10 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | 3/4" | 5/16" | 32° to 180° | Black | 10 | 000000000 | 00000 |
| 7/8" | Fully Threaded | __ | 3/4" | 5/16" | 32° to 180° | Black | 10 | 000000000 | 00000 |
| 1 1/8" | Fully Threaded | __ | 3/4" | 5/16" | 32° to 180° | Black | 10 | 000000000 | 00000 |
| 1 3/8" | Partially Threaded | 1" | 3/4" | 5/16" | 32° to 180° | Black | 10 | 000000000 | 00000 |
1/4"-28 | |||||||||
| 3/8" | Fully Threaded | __ | 3/4" | 5/16" | 32° to 180° | Black | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | 3/4" | 5/16" | 32° to 180° | Black | 10 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | 3/4" | 5/16" | 32° to 180° | Black | 10 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | 3/4" | 5/16" | 32° to 180° | Black | 10 | 000000000 | 00000 |
| 7/8" | Fully Threaded | __ | 3/4" | 5/16" | 32° to 180° | Black | 10 | 000000000 | 00000 |
| 1 1/8" | Fully Threaded | __ | 3/4" | 5/16" | 32° to 180° | Black | 10 | 000000000 | 00000 |
| 1 3/8" | Partially Threaded | 1" | 3/4" | 5/16" | 32° to 180° | Black | 10 | 000000000 | 00000 |
5/16"-18 | |||||||||
| 1/2" | Fully Threaded | __ | 1" | 13/32" | 32° to 180° | Black | 5 | 000000000 | 0000 |
| 5/8" | Fully Threaded | __ | 1" | 13/32" | 32° to 180° | Black | 5 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | 1" | 13/32" | 32° to 180° | Black | 5 | 000000000 | 00000 |
| 7/8" | Fully Threaded | __ | 1" | 13/32" | 32° to 180° | Black | 5 | 000000000 | 00000 |
| 1 1/8" | Fully Threaded | __ | 1" | 13/32" | 32° to 180° | Black | 5 | 000000000 | 00000 |
| 1 3/8" | Fully Threaded | __ | 1" | 13/32" | 32° to 180° | Black | 5 | 000000000 | 00000 |
5/16"-24 | |||||||||
| 1/2" | Fully Threaded | __ | 1" | 13/32" | 32° to 180° | Black | 5 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | 1" | 13/32" | 32° to 180° | Black | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | 1" | 13/32" | 32° to 180° | Black | 5 | 000000000 | 00000 |
| 7/8" | Fully Threaded | __ | 1" | 13/32" | 32° to 180° | Black | 5 | 000000000 | 00000 |
| 1 1/8" | Fully Threaded | __ | 1" | 13/32" | 32° to 180° | Black | 5 | 000000000 | 00000 |
| 1 3/8" | Fully Threaded | __ | 1" | 13/32" | 32° to 180° | Black | 5 | 000000000 | 00000 |
Metric Thumb-Grip 18-8 Stainless Steel Precision Shoulder Screws
Install and remove these shoulder screws by hand or with a hex key. Made of 18-8 stainless steel, they have good corrosion resistance and may be mildly magnetic. With a shoulder diameter that is twice as precise as our general purpose shoulder screws, they provide smooth, accurate movement. Use them where precision matters, such as in measuring devices, optical fixtures, and laboratory equipment.
For technical drawings and 3-D models, click on a part number.
Each | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Shoulder Lg., mm | Thread Size | Thread Pitch, mm | Thread Lg., mm | Head Dia., mm | Head Ht., mm | Tensile Strength, psi | Drive Size, mm | 1-4 | 5-Up | |
4 mm Shoulder Dia.—Precise Fit (-0.025 to 0 mm Dia. Tolerance) | ||||||||||
| 4 | M3 | 0.5 | 4 | 8 | 3.2 | 70,000 | 2 | 000000000 | 00000 | 00000 |
| 5 | M3 | 0.5 | 4 | 8 | 3.2 | 70,000 | 2 | 000000000 | 0000 | 0000 |
| 6 | M3 | 0.5 | 4 | 8 | 3.2 | 70,000 | 2 | 000000000 | 0000 | 0000 |
| 8 | M3 | 0.5 | 4 | 8 | 3.2 | 70,000 | 2 | 000000000 | 0000 | 0000 |
| 10 | M3 | 0.5 | 4 | 8 | 3.2 | 70,000 | 2 | 000000000 | 0000 | 0000 |
5 mm Shoulder Dia.—Precise Fit (-0.025 to 0 mm Dia. Tolerance) | ||||||||||
| 4 | M4 | 0.7 | 5 | 10 | 4 | 70,000 | 2.5 | 000000000 | 0000 | 0000 |
| 5 | M4 | 0.7 | 5 | 10 | 4 | 70,000 | 2.5 | 000000000 | 0000 | 0000 |
| 6 | M4 | 0.7 | 5 | 10 | 4 | 70,000 | 2.5 | 000000000 | 0000 | 0000 |
| 8 | M4 | 0.7 | 5 | 10 | 4 | 70,000 | 2.5 | 000000000 | 0000 | 0000 |
| 10 | M4 | 0.7 | 5 | 10 | 4 | 70,000 | 2.5 | 000000000 | 0000 | 0000 |
| 12 | M4 | 0.7 | 5 | 10 | 4 | 70,000 | 2.5 | 000000000 | 0000 | 0000 |
| 14 | M4 | 0.7 | 5 | 10 | 4 | 70,000 | 2.5 | 000000000 | 0000 | 0000 |
| 16 | M4 | 0.7 | 5 | 10 | 4 | 70,000 | 2.5 | 000000000 | 0000 | 0000 |
| 20 | M4 | 0.7 | 5 | 10 | 4 | 70,000 | 2.5 | 000000000 | 0000 | 0000 |
| 25 | M4 | 0.7 | 5 | 10 | 4 | 70,000 | 2.5 | 000000000 | 0000 | 0000 |
6 mm Shoulder Dia.—Precise Fit (-0.025 to 0 mm Dia. Tolerance) | ||||||||||
| 6 | M5 | 0.8 | 6 | 12 | 5 | 70,000 | 3 | 000000000 | 0000 | 0000 |
| 8 | M5 | 0.8 | 6 | 12 | 5 | 70,000 | 3 | 000000000 | 0000 | 0000 |
| 10 | M5 | 0.8 | 6 | 12 | 5 | 70,000 | 3 | 000000000 | 0000 | 0000 |
| 12 | M5 | 0.8 | 6 | 12 | 5 | 70,000 | 3 | 000000000 | 0000 | 0000 |
| 14 | M5 | 0.8 | 6 | 12 | 5 | 70,000 | 3 | 000000000 | 0000 | 0000 |
| 16 | M5 | 0.8 | 6 | 12 | 5 | 70,000 | 3 | 000000000 | 0000 | 0000 |
| 20 | M5 | 0.8 | 6 | 12 | 5 | 70,000 | 3 | 000000000 | 0000 | 0000 |
| 25 | M5 | 0.8 | 6 | 12 | 5 | 70,000 | 3 | 000000000 | 0000 | 0000 |
Thumb-Grip 18-8 Stainless Steel Precision Shoulder Screws
Install and remove these shoulder screws by hand or with a hex key. Made of 18-8 stainless steel, they have good corrosion resistance and may be mildly magnetic. With a shoulder diameter that is twice as precise as our general purpose shoulder screws, they provide smooth, accurate movement. Use them where precision matters, such as in measuring devices, optical fixtures, and laboratory equipment.
For technical drawings and 3-D models, click on a part number.
Each | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Shoulder Lg. | Thread Size | Thread Lg. | Head Dia. | Head Ht. | Tensile Strength, psi | Drive Size | 1-4 | 5-Up | |
1/8" Shoulder Dia.—Precise Fit (-0.001" to 0" Dia. Tolerance) | |||||||||
| 1/8" | 4-40 | 5/32" | 5/16" | 1/8" | 70,000 | 5/64" | 000000000 | 00000 | 00000 |
| 3/16" | 4-40 | 5/32" | 5/16" | 1/8" | 70,000 | 5/64" | 000000000 | 0000 | 0000 |
| 1/4" | 4-40 | 5/32" | 5/16" | 1/8" | 70,000 | 5/64" | 000000000 | 0000 | 0000 |
| 5/16" | 4-40 | 5/32" | 5/16" | 1/8" | 70,000 | 5/64" | 000000000 | 0000 | 0000 |
| 3/8" | 4-40 | 5/32" | 5/16" | 1/8" | 70,000 | 5/64" | 000000000 | 0000 | 0000 |
3/16" Shoulder Dia.—Precise Fit (-0.001" to 0" Dia. Tolerance) | |||||||||
| 1/8" | 8-32 | 3/16" | 3/8" | 5/32" | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 3/16" | 8-32 | 3/16" | 3/8" | 5/32" | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 1/4" | 8-32 | 3/16" | 3/8" | 5/32" | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 5/16" | 8-32 | 3/16" | 3/8" | 5/32" | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 3/8" | 8-32 | 3/16" | 3/8" | 5/32" | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 1/2" | 8-32 | 3/16" | 3/8" | 5/32" | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 5/8" | 8-32 | 3/16" | 3/8" | 5/32" | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 3/4" | 8-32 | 3/16" | 3/8" | 5/32" | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
| 1" | 8-32 | 3/16" | 3/8" | 5/32" | 70,000 | 3/32" | 000000000 | 0000 | 0000 |
1/4" Shoulder Dia.—Precise Fit (-0.001" to 0" Dia. Tolerance) | |||||||||
| 1/8" | 10-32 | 1/4" | 7/16" | 3/16" | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 3/16" | 10-32 | 1/4" | 7/16" | 3/16" | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 1/4" | 10-32 | 1/4" | 7/16" | 3/16" | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 5/16" | 10-32 | 1/4" | 7/16" | 3/16" | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 3/8" | 10-32 | 1/4" | 7/16" | 3/16" | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 1/2" | 10-32 | 1/4" | 7/16" | 3/16" | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 5/8" | 10-32 | 1/4" | 7/16" | 3/16" | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 3/4" | 10-32 | 1/4" | 7/16" | 3/16" | 70,000 | 1/8" | 000000000 | 0000 | 0000 |
| 1" | 10-32 | 1/4" | 7/16" | 3/16" | 70,000 | 1/8" | 000000000 | 0000 | 0000 |