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Head Type Head Type |
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![]() | Hex |
Cap Nut Profile Cap Nut Profile |
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![]() | Low |
Specifications Met Specifications Met | Show |
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Specifications Met Specifications Met | Hide |
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Environment Environment |
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Threading Threading |
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![]() | Fully Threaded |
Thread Direction Thread Direction |
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Screw Features Screw Features |
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![]() | Sealing |
Drive Style Drive Style |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Seal Material Seal Material |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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About Nuts, Materials, and Finishes
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About Hex Head Screws and Bolts
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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 | |||||||||||
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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 |
Sanitary Low-Profile Cap Nuts

Certified by EHEDG (European Hygienic Engineering and Design Group) to meet sanitary design standards, these cap nuts fit into tight spaces to cover and seal exposed threads in your food processing facility. Also known as acorn nuts, they’re at least 20% shorter than standard cap nuts. Made from 316 stainless steel, these nuts won’t corrode from frequent washdowns with water or harsh cleaners. They are self-draining, meaning that they don’t have horizontal surfaces, so liquids and debris will drain off completely. They also have extremely smooth sides and rounded edges to eliminate crevices where bacteria could grow.
The silicone seal at the base of the nut keeps contaminants off the threads and prevents an unsanitary metal-to-metal connection. It’s made with metal and chemical additives, so you can find it with a metal detector or X-ray machine if it falls into your line. This helps you comply with Hazard Analysis and Critical Control Point (HACCP) programs to keep contaminated food from leaving your facility. The seal is also FDA compliant, so it’s safe for direct contact with food.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||
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Size | Pitch | Dp. | Wd. | Ht. | Performance Properties | Specifications Met | Each | |
316 Stainless Steel—Silicone Rubber Seal | ||||||||
Inch | ||||||||
1/4"-20 | __ | 1/4" | 7/16" | 21/64" | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
5/16"-18 | __ | 9/32" | 1/2" | 25/64" | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 0000 |
3/8"-16 | __ | 5/16" | 9/16" | 15/32" | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 0000 |
7/16"-14 | __ | 21/64" | 11/16" | 33/64" | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
1/2"-13 | __ | 11/32" | 3/4" | 35/64" | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
5/8"-11 | __ | 7/16" | 15/16" | 43/64" | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
Metric | ||||||||
M6 | 1 mm | 5.5mm | 10mm | 8mm | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
M8 | 1.25 mm | 6.5mm | 13mm | 10mm | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
M10 | 1.5 mm | 8mm | 16mm | 12mm | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
M12 | 1.75 mm | 9mm | 18mm | 14mm | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |
M16 | 2 mm | 10.5mm | 24mm | 17mm | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA Compliant 21 CFR 177.2600 | 000000000 | 00000 |