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Screw Features Screw Features |
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Length Length |
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Material Material |
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Threading Threading |
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Drive Style Drive Style |
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| External Hex | Hex |
Washer Type Washer Type |
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| Flat | External-Tooth Lock |
Head Height Head Height |
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Thread Direction Thread Direction |
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Finish Finish |
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Tensile Strength Tensile Strength |
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Hardness Hardness |
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Washer Material Washer Material |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Washer OD Washer OD |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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About Hex Head Screws and Bolts
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About Socket Head Screws
More
Hex Head Screws with Lock Washer
Also known as Sems screws, these screws have a permanently attached but freely rotating tooth lock washer that bites into the mating surface for vibration resistance. The zinc plating provides corrosion resistance in wet environments. Length is measured from under the head.
Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine threads are closely spaced to prevent loosening from vibration.
For technical drawings and 3-D models, click on a part number.
Head | Washer | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Wd. | Ht. | OD | Thick. | Material | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||||||
6-32 | |||||||||||
| 1/4" | Fully Threaded | Coarse | 1/4" | 3/32" | 0.285" | 0.022" | Zinc-Plated Steel | 60,000 | 100 | 000000000 | 000000 |
| 3/8" | Fully Threaded | Coarse | 1/4" | 3/32" | 0.285" | 0.022" | Zinc-Plated Steel | 60,000 | 100 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Coarse | 1/4" | 3/32" | 0.285" | 0.022" | Zinc-Plated Steel | 60,000 | 100 | 000000000 | 00000 |
8-32 | |||||||||||
| 1/4" | Fully Threaded | Coarse | 5/16" | 7/64" | 0.317" | 0.023" | Zinc-Plated Steel | 60,000 | 50 | 000000000 | 0000 |
| 3/8" | Fully Threaded | Coarse | 5/16" | 7/64" | 0.317" | 0.023" | Zinc-Plated Steel | 60,000 | 50 | 000000000 | 0000 |
| 1/2" | Fully Threaded | Coarse | 5/16" | 7/64" | 0.317" | 0.023" | Zinc-Plated Steel | 60,000 | 50 | 000000000 | 0000 |
10-24 | |||||||||||
| 3/8" | Fully Threaded | Coarse | 5/16" | 1/8" | 0.381" | 0.024" | Zinc-Plated Steel | 60,000 | 100 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Coarse | 5/16" | 1/8" | 0.381" | 0.024" | Zinc-Plated Steel | 60,000 | 100 | 000000000 | 00000 |
10-32 | |||||||||||
| 3/8" | Fully Threaded | Fine | 5/16" | 1/8" | 0.381" | 0.024" | Zinc-Plated Steel | 60,000 | 100 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Fine | 5/16" | 1/8" | 0.381" | 0.024" | Zinc-Plated Steel | 60,000 | 100 | 000000000 | 00000 |
1/4"-20 | |||||||||||
| 3/8" | Fully Threaded | Coarse | 7/16" | 3/16" | 0.475" | 0.028" | Zinc-Plated Steel | 60,000 | 100 | 000000000 | 00000 |
| 1/2" | Fully Threaded | Coarse | 7/16" | 3/16" | 0.475" | 0.028" | Zinc-Plated Steel | 60,000 | 50 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 7/16" | 3/16" | 0.475" | 0.028" | Zinc-Plated Steel | 60,000 | 50 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 7/16" | 3/16" | 0.475" | 0.028" | Zinc-Plated Steel | 60,000 | 25 | 000000000 | 0000 |
Sealing Hex Head Screws
An O-ring under the head prevents leaks and seals out contaminants. Made of silicone, the O-ring withstands salt water, most acids, and temperatures up to 400° F. These 18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. They are reusable. Length is measured from under the head.
Replacement silicone O-rings are sold separately. Choose fluoroelastomer O-rings when you need oil and chemical resistance.
For technical drawings and 3-D models, click on a part number.
Fully Threaded
Partially Threaded
Head | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Wd. | Ht. | For Maximum Hole Diameter | Max. Pressure, psi | O-Ring Material | O-Ring Temperature Range, °F | Tensile Strength, psi | Each | |
18-8 Stainless Steel | ||||||||||||
6-32 | ||||||||||||
| 1/4" | Fully Threaded | __ | Coarse | 1/4" | 3/32" | 0.151" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 00000 |
| 3/8" | Fully Threaded | __ | Coarse | 1/4" | 3/32" | 0.151" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | Coarse | 1/4" | 3/32" | 0.151" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
8-32 | ||||||||||||
| 1/4" | Fully Threaded | __ | Coarse | 1/4" | 7/64" | 0.177" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 3/8" | Fully Threaded | __ | Coarse | 1/4" | 7/64" | 0.177" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | Coarse | 1/4" | 7/64" | 0.177" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Coarse | 1/4" | 7/64" | 0.177" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
10-32 | ||||||||||||
| 1/4" | Fully Threaded | __ | Fine | 1/8" | 5/16" | 0.2" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 3/8" | Fully Threaded | __ | Fine | 1/8" | 5/16" | 0.2" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | Fine | 1/8" | 5/16" | 0.2" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Fine | 1/8" | 5/16" | 0.2" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
1/4"-20 | ||||||||||||
| 1/4" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 0.269" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 3/8" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 0.269" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 0.269" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 0.269" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 0.269" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 7/16" | 5/32" | 0.269" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1 1/4" | Partially Threaded | 3/4" | Coarse | 7/16" | 5/32" | 0.269" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 3/4" | Coarse | 7/16" | 5/32" | 0.269" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 2" | Partially Threaded | 3/4" | Coarse | 7/16" | 5/32" | 0.269" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 2 1/2" | Partially Threaded | 3/4" | Coarse | 7/16" | 5/32" | 0.269" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
5/16"-18 | ||||||||||||
| 1/2" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 0.336" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 5/8" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 0.336" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 0.336" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 0.336" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 1/2" | 13/64" | 0.336" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1 1/4" | Partially Threaded | 7/8" | Coarse | 1/2" | 13/64" | 0.336" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 7/8" | Coarse | 1/2" | 13/64" | 0.336" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 2" | Partially Threaded | 7/8" | Coarse | 1/2" | 13/64" | 0.336" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
3/8"-16 | ||||||||||||
| 1/2" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 0.399" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 5/8" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 0.399" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 0.399" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 0.399" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 9/16" | 15/64" | 0.399" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1 1/4" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 0.399" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 0.399" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 2" | Partially Threaded | 1" | Coarse | 9/16" | 15/64" | 0.399" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
1/2"-13 | ||||||||||||
| 1/2" | Fully Threaded | __ | Coarse | 3/4" | 5/16" | 0.534" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Coarse | 3/4" | 5/16" | 0.534" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Coarse | 3/4" | 5/16" | 0.534" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 3/4" | 5/16" | 0.534" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 0.534" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 0.534" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 2 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 0.534" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 3" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 0.534" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 3 1/2" | Partially Threaded | 1 1/4" | Coarse | 3/4" | 5/16" | 0.534" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
5/8"-11 | ||||||||||||
| 3/4" | Fully Threaded | __ | Coarse | 15/16" | 25/64" | 0.655" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Coarse | 15/16" | 25/64" | 0.655" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | __ | Coarse | 15/16" | 25/64" | 0.655" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 2" | Fully Threaded | __ | Coarse | 15/16" | 25/64" | 0.655" | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
M4 × 0.7 mm | ||||||||||||
| 10mm | Fully Threaded | __ | Coarse | 7mm | 2.8mm | 4.546mm | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 12mm | Fully Threaded | __ | Coarse | 7mm | 2.8mm | 4.546mm | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
M5 × 0.8 mm | ||||||||||||
| 10mm | Fully Threaded | __ | Coarse | 8mm | 3.5mm | 5.562mm | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 12mm | Fully Threaded | __ | Coarse | 8mm | 3.5mm | 5.562mm | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 18mm | Fully Threaded | __ | Coarse | 8mm | 3.5mm | 5.562mm | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
M6 × 1 mm | ||||||||||||
| 12mm | Fully Threaded | __ | Coarse | 10mm | 4mm | 6.655mm | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 16mm | Fully Threaded | __ | Coarse | 10mm | 4mm | 6.655mm | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 18mm | Fully Threaded | __ | Coarse | 10mm | 4mm | 6.655mm | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 20mm | Fully Threaded | __ | Coarse | 10mm | 4mm | 6.655mm | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 25mm | Fully Threaded | __ | Coarse | 10mm | 4mm | 6.655mm | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
M8 × 1.25 mm | ||||||||||||
| 20mm | Fully Threaded | __ | Coarse | 13mm | 5.3mm | 9.041mm | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 25mm | Fully Threaded | __ | Coarse | 13mm | 5.3mm | 9.041mm | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 30mm | Fully Threaded | __ | Coarse | 13mm | 5.3mm | 9.041mm | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
| 35mm | Partially Threaded | 22mm | Coarse | 13mm | 5.3mm | 9.041mm | 20,000 | Silicone Rubber | -80° to 400° | 80,000 | 000000000 | 0000 |
Hex Head Screws with Flat Washer
A freely rotating but permanently attached washer distributes pressure over a wider area than a flange, preventing damage to your material's surface. Also known as Sems screws. Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | Washer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Wd. | Ht. | OD | Thick. | Material | Tensile Strength, psi | Each | |
18-8 Stainless Steel | ||||||||||
1/4"-20 | ||||||||||
| 1/2" | Fully Threaded | Coarse | 7/16" | 5/32" | 0.749" | 0.064" | Stainless Steel | 100,000 | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 7/16" | 5/32" | 0.749" | 0.064" | Stainless Steel | 100,000 | 000000000 | 0000 |
| 1" | Fully Threaded | Coarse | 7/16" | 5/32" | 0.749" | 0.064" | Stainless Steel | 100,000 | 000000000 | 0000 |
5/16"-18 | ||||||||||
| 1/2" | Fully Threaded | Coarse | 1/2" | 13/64" | 0.89" | 0.064" | Stainless Steel | 100,000 | 000000000 | 0000 |
| 3/4" | Fully Threaded | Coarse | 1/2" | 13/64" | 0.89" | 0.064" | Stainless Steel | 100,000 | 000000000 | 0000 |
| 1" | Fully Threaded | Coarse | 1/2" | 13/64" | 0.89" | 0.064" | Stainless Steel | 100,000 | 000000000 | 0000 |
3/8"-16 | ||||||||||
| 3/4" | Fully Threaded | Coarse | 9/16" | 15/64" | 1.015" | 0.064" | Stainless Steel | 100,000 | 000000000 | 0000 |
| 1" | Fully Threaded | Coarse | 9/16" | 15/64" | 1.015" | 0.064" | Stainless Steel | 100,000 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | Coarse | 9/16" | 15/64" | 1.015" | 0.064" | Stainless Steel | 100,000 | 000000000 | 0000 |
1/2"-13 | ||||||||||
| 1" | Fully Threaded | Coarse | 3/4" | 5/16" | 1.243" | 0.101" | Stainless Steel | 100,000 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | Coarse | 3/4" | 5/16" | 1.243" | 0.101" | Stainless Steel | 100,000 | 000000000 | 0000 |
| 2" | Fully Threaded | Coarse | 3/4" | 5/16" | 1.243" | 0.101" | Stainless Steel | 100,000 | 000000000 | 0000 |
Sanitary Hex Head Screws
Bolt down equipment in food processing or sanitary areas while sealing out contaminants. Certified by EHEDG (European Hygienic Engineering and Design Group) to meet sanitary design standards, these screws have a nitrile rubber seal underneath the head to keep liquid and debris off the threads and prevent an unsanitary metal-to-metal connection. The seal is also FDA compliant, so it’s safe for direct contact with food.
Made from 316 stainless steel, these screws won’t corrode from frequent washdowns with water or harsh cleaners. They have self-draining surfaces, which means there are no horizontal ledges, so liquid and debris will drain off completely. The smooth, polished sides and rounded edges have no pits or crevices where bacteria could grow.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Wd. | Ht. | Flange Diameter | Temperature Range, °F | Tensile Strength, psi | Performance Properties | Specifications Met | Each | |
316 Stainless Steel | |||||||||||
1/4"-20 | |||||||||||
| 1/2" | Fully Threaded | Coarse | 7/16" | 21/64" | 37/64" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 000000 |
| 3/4" | Fully Threaded | Coarse | 7/16" | 21/64" | 37/64" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 7/16" | 21/64" | 37/64" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 7/16" | 21/64" | 37/64" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 7/16" | 21/64" | 37/64" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
5/16"-18 | |||||||||||
| 3/4" | Fully Threaded | Coarse | 1/2" | 25/64" | 11/16" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 1/2" | 25/64" | 11/16" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 1/2" | 25/64" | 11/16" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 1/2" | 25/64" | 11/16" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
3/8"-16 | |||||||||||
| 3/4" | Fully Threaded | Coarse | 9/16" | 15/32" | 25/32" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 9/16" | 15/32" | 25/32" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 9/16" | 15/32" | 25/32" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 9/16" | 15/32" | 25/32" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
1/2"-13 | |||||||||||
| 1" | Fully Threaded | Coarse | 3/4" | 35/64" | 1 1/16" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 1 1/4" | Fully Threaded | Coarse | 3/4" | 35/64" | 1 1/16" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 1 1/2" | Fully Threaded | Coarse | 3/4" | 35/64" | 1 1/16" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 1 3/4" | Fully Threaded | Coarse | 3/4" | 35/64" | 1 1/16" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 2" | Fully Threaded | Coarse | 3/4" | 35/64" | 1 1/16" | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
M6 × 1mm | |||||||||||
| 12mm | Fully Threaded | Coarse | 10mm | 8mm | 12.8mm | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 0000 |
| 16mm | Fully Threaded | Coarse | 10mm | 8mm | 12.8mm | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 0000 |
| 20mm | Fully Threaded | Coarse | 10mm | 8mm | 12.8mm | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 0000 |
| 25mm | Fully Threaded | Coarse | 10mm | 8mm | 12.8mm | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 0000 |
M8 × 1.25mm | |||||||||||
| 16mm | Fully Threaded | Coarse | 13mm | 10mm | 17.3mm | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 20mm | Fully Threaded | Coarse | 13mm | 10mm | 17.3mm | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 25mm | Fully Threaded | Coarse | 13mm | 10mm | 17.3mm | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
| 30mm | Fully Threaded | Coarse | 13mm | 10mm | 17.3mm | -75° to 390° | 70,000 | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
Socket Head Screws with Flat Washer
Fully Threaded
Partially Threaded
A freely rotating washer distributes pressure over a wider area than a flange, preventing damage to your material's surface. Also known as Sems screws. With a tensile strength of 170,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. Their black-oxide finish provides mild corrosion resistance in dry environments. Made to dimensional and material quality standards, all meet ASTM A574 and some also meet ASME B18.3. Length is measured from under the head.
Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
For technical drawings and 3-D models, click on a part number.
Head | Washer | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | OD | Thick. | Drive Size | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Oxide Alloy Steel | |||||||||||||
4-40 | |||||||||||||
| 1/4" | Fully Threaded | __ | Coarse | 0.183" | 0.112" | 5/16" | 0.032" | 3/32" | 170,000 | ASTM A574 | 1 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Coarse | 0.183" | 0.112" | 5/16" | 0.032" | 3/32" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Coarse | 0.183" | 0.112" | 5/16" | 0.032" | 3/32" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1" | Partially Threaded | 3/4" | Coarse | 0.183" | 0.112" | 5/16" | 0.032" | 3/32" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
6-32 | |||||||||||||
| 1/4" | Fully Threaded | __ | Coarse | 0.226" | 0.138" | 3/8" | 0.049" | 7/64" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | Coarse | 0.226" | 0.138" | 3/8" | 0.049" | 7/64" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Coarse | 0.226" | 0.138" | 3/8" | 0.049" | 7/64" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Coarse | 0.226" | 0.138" | 3/8" | 0.049" | 7/64" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 1/4" | Partially Threaded | 3/4" | Coarse | 0.226" | 0.138" | 3/8" | 0.049" | 7/64" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
8-32 | |||||||||||||
| 3/4" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 7/16" | 0.049" | 9/64" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 7/16" | 0.049" | 9/64" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 1/4" | Partially Threaded | 7/8" | Coarse | 0.27" | 0.164" | 7/16" | 0.049" | 9/64" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1 1/8" | Coarse | 0.27" | 0.164" | 7/16" | 0.049" | 9/64" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
10-24 | |||||||||||||
| 1/2" | Fully Threaded | __ | Coarse | 9/16" | 3/8" | 1/2" | 0.049" | 5/32" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Coarse | 9/16" | 3/8" | 1/2" | 0.049" | 5/32" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1" | Fully Threaded | __ | Coarse | 9/16" | 3/8" | 1/2" | 0.049" | 5/32" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 1/4" | Partially Threaded | 7/8" | Coarse | 9/16" | 3/8" | 1/2" | 0.049" | 5/32" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1 1/8" | Coarse | 9/16" | 3/8" | 1/2" | 0.049" | 5/32" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
10-32 | |||||||||||||
| 1 1/4" | Partially Threaded | 7/8" | Fine | 5/16" | 0.19" | 1/2" | 0.049" | 5/32" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 1/2" | Partially Threaded | 1 1/8" | Fine | 5/16" | 0.19" | 1/2" | 0.049" | 5/32" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
3/8"-16 | |||||||||||||
| 1" | Fully Threaded | __ | Coarse | 9/16" | 3/8" | 13/16" | 0.065" | 5/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Coarse | 9/16" | 3/8" | 13/16" | 0.065" | 5/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | __ | Coarse | 9/16" | 3/8" | 13/16" | 0.065" | 5/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
3/8"-24 | |||||||||||||
| 1" | Fully Threaded | __ | Fine | 9/16" | 3/8" | 13/16" | 0.065" | 5/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 1/4" | Fully Threaded | __ | Fine | 9/16" | 3/8" | 13/16" | 0.065" | 5/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 1 1/2" | Fully Threaded | __ | Fine | 9/16" | 3/8" | 13/16" | 0.065" | 5/16" | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
M3 | |||||||||||||
| 6mm | Fully Threaded | __ | Coarse | 5.68mm | 3mm | 10mm | 1.2mm | 2.5 mm | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 8mm | Fully Threaded | __ | Coarse | 5.68mm | 3mm | 10mm | 1.2mm | 2.5 mm | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 10mm | Fully Threaded | __ | Coarse | 5.68mm | 3mm | 10mm | 1.2mm | 2.5 mm | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 12mm | Fully Threaded | __ | Coarse | 5.68mm | 3mm | 10mm | 1.2mm | 2.5 mm | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
M4 | |||||||||||||
| 6mm | Fully Threaded | __ | Coarse | 7.22mm | 4mm | 12mm | 1.4mm | 3 mm | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 8mm | Fully Threaded | __ | Coarse | 7.22mm | 4mm | 12mm | 1.4mm | 3 mm | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 10mm | Fully Threaded | __ | Coarse | 7.22mm | 4mm | 12mm | 1.4mm | 3 mm | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 12mm | Fully Threaded | __ | Coarse | 7.22mm | 4mm | 12mm | 1.4mm | 3 mm | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
M5 | |||||||||||||
| 6mm | Fully Threaded | __ | Coarse | 8.72mm | 5mm | 15mm | 1.8mm | 4 mm | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 8mm | Fully Threaded | __ | Coarse | 8.72mm | 5mm | 15mm | 1.8mm | 4 mm | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 10mm | Fully Threaded | __ | Coarse | 8.72mm | 5mm | 15mm | 1.8mm | 4 mm | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |
| 12mm | Fully Threaded | __ | Coarse | 8.72mm | 5mm | 15mm | 1.8mm | 4 mm | 170,000 | ASTM A574 | 1 | 000000000 | 0000 |