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Thread Size Thread Size | Show |
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Cap Nut Profile Cap Nut Profile |
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| Extra-Wide High | High |
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Thread Spacing Thread Spacing |
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Thread Type Thread Type |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Drive Style Drive Style |
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Locking Type Locking Type |
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| Nylon Insert | Distorted Thread |
Specifications Met Specifications Met |
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Cap Color Cap Color |
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 | Black |
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Insert Maximum Temperature Insert Maximum Temperature |
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About Nuts, Materials, and Finishes
More
18-8 Stainless Steel Cap Nuts
These cap nuts have good chemical resistance and may be mildly magnetic. Also known as acorn nuts, they have a smooth rounded head that covers and protects threads while providing a finished appearance.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||
|---|---|---|---|---|---|---|
| Size | Dp. | Wd. | Ht. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||
| 3/8"-16 | 3/8" | 9/16" | 5/8" | 5 | 000000000 | 00000 |
Super-Corrosion-Resistant 316 Stainless Steel Cap Nuts
These cap nuts have excellent resistance to chemicals and salt water. Also known as acorn nuts, they have a smooth rounded head that covers and protects threads while providing a finished appearance. They may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||
|---|---|---|---|---|---|---|
| Size | Dp. | Wd. | Ht. | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||
| 3/8"-16 | 3/8" | 9/16" | 5/8" | 1 | 000000000 | 00000 |
Low-Strength Steel Cap Nuts
Also known as acorn nuts, these nuts have a smooth rounded head that covers and protects threads while providing a finished appearance. About half the strength of medium-strength steel cap nuts, use them in light duty fastening applications, such as securing access panels.
Zinc-plated steel cap nuts resist corrosion in wet environments.
Nickel-plated steel cap nuts have excellent resistance to chemicals and salt water and have a decorative metallic finish.
Black ultra-corrosion-resistant coated steel cap nuts have excellent resistance to chemicals and salt water.
For technical drawings and 3-D models, click on a part number.
High-Strength Steel Cap Nuts—Grade 8
Also known as acorn nuts, these nuts have a smooth rounded head that covers and protects threads while providing a finished appearance. They're about 25% stronger than medium-strength steel cap nuts.
Zinc-plated steel cap nuts resist corrosion in wet environments.
Black ultra-corrosion-resistant coated steel cap nuts have excellent resistance to chemicals and salt water.
For technical drawings and 3-D models, click on a part number.
Medium-Strength Steel Cap Nuts
Also known as acorn nuts, these nuts have a smooth rounded head that covers and protects threads while providing a finished appearance. Made from Grade 5 steel, they're suitable for fastening most machinery and equipment.
Zinc-plated steel cap nuts resist corrosion in wet environments.
Black ultra-corrosion-resistant coated steel cap nuts have excellent resistance to chemicals and salt water.
For technical drawings and 3-D models, click on a part number.
Plastic Cap Nuts
These nylon 6/6 cap nuts are chemical resistant, nonconductive, and lightweight. Also known as acorn nuts, they have a smooth rounded head that covers and protects threads while providing a finished appearance.
For technical drawings and 3-D models, click on a part number.
Brass Cap Nuts
These cap nuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. Also known as acorn nuts, they have a smooth rounded head that covers and protects threads while providing a finished appearance. All have excellent resistance to chemicals and salt water and have a decorative metallic finish.
For technical drawings and 3-D models, click on a part number.
Aluminum Cap Nuts
One-third the weight of steel, aluminum cap nuts resist corrosion in wet environments and are nonmagnetic. Also known acorn nuts, they have a smooth rounded head that covers and protects threads while providing a finished appearance.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||
|---|---|---|---|---|---|---|
| Size | Dp. | Wd. | Ht. | Pkg. Qty. | Pkg. | |
2011 Aluminum | ||||||
| 3/8"-16 | 1/4" | 5/8" | 1/2" | 10 | 000000000 | 00000 |
Steel Extra-Wide High-Hex Cap Nuts
These cap nuts are about 20% wider and taller than standard cap nuts and have high sides to provide a larger area for your wrench to grip. Also known as acorn nuts, a smooth rounded head covers and protects threads while providing a finished appearance. They have a black-oxide finish that provides mild corrosion resistance in dry environments.
For technical drawings and 3-D models, click on a part number.
Thread | |||||
|---|---|---|---|---|---|
| Size | Dp. | Wd. | Ht. | Each | |
Black-Oxide Steel | |||||
| 3/8"-16 | 15/32" | 3/4" | 3/4" | 000000000 | 00000 |
Stainless Steel Extra-Wide High-Hex Cap Nuts
These cap nuts have good chemical resistance. They're about 20% wider and taller than standard cap nuts and have high sides to provide a larger area for your wrench to grip. Also known as acorn nuts, a smooth rounded head covers and protects threads while providing a finished appearance.
For technical drawings and 3-D models, click on a part number.
Thread | |||||
|---|---|---|---|---|---|
| Size | Dp. | Wd. | Ht. | Each | |
18-8 Stainless Steel | |||||
| 3/8"-16 | 15/32" | 3/4" | 3/4" | 000000000 | 00000 |
Low-Profile Cap Nuts
About 20% shorter than standard cap nuts, use these in low-profile applications. Also known as acorn nuts, they have a smooth rounded head that covers and protects threads while providing a finished appearance. Made from 18-8 stainless steel, they have good chemical resistance.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||
|---|---|---|---|---|---|---|
| Size | Dp. | Wd. | Ht. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||
| 3/8"-16 | 5/16" | 5/8" | 1/2" | 5 | 000000000 | 000000 |
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 | |||||||
|---|---|---|---|---|---|---|---|
| Size | Dp. | Wd. | Ht. | Performance Properties | Specifications Met | Each | |
316 Stainless Steel—Silicone Rubber Seal | |||||||
Inch | |||||||
| 3/8"-16 | 5/16 " | 9/16 " | 15/32 " | Metal Detectable, X-Ray Detectable | EHEDG Certified, FDA 21 CFR 177.2600 | 000000000 | 00000 |
High-Profile Cap Nuts
These cap nuts offer at least three-times the thread depth of standard acorn nuts and are about twice the height. Also known as acorn nuts, they have a smooth rounded head that covers and protects threads while providing a finished appearance. Made from 18-8 stainless steel, they have good chemical resistance.
For technical drawings and 3-D models, click on a part number.
Distorted-Thread Cap Locknuts
An irregularly shaped thread grips the bolt for a stronger hold than nylon-insert cap locknuts. Also known as acorn locknuts, a smooth rounded head that covers and protects threads while providing a finished appearance. Made from 18-8 stainless steel, they have good chemical resistance.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||
|---|---|---|---|---|---|---|
| Size | Dp. | Wd. | Ht. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||
| 3/8"-16 | 3/8" | 9/16" | 5/8" | 5 | 000000000 | 000000 |
Nylon-Insert Cap Locknuts
The nylon cap covers and grips the threads to resist loosening. They’re reusable, but their holding power lessens with each use. Nuts are steel with a nylon 6/6 cap and insert.
Zinc-plated nuts have a layer of zinc that protects the steel from rust in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread | |||||||
|---|---|---|---|---|---|---|---|
| Size | Dp. | Wd. | Ht. | Insert Max. Temp., °F | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Grade 2 | |||||||
| 3/8"-16 | 21/64" | 9/16" | 5/8" | 250° | 25 | 000000000 | 000000 |
Open-End Cap Nuts
An open dome allows these cap nuts to be used on bolts or rods of any length. Their domed shape provides a finished appearance. Made from 18-8 stainless steel, they have good chemical resistance.
For technical drawings and 3-D models, click on a part number.
Thread | |||||
|---|---|---|---|---|---|
| Size | Dp. | Wd. | Ht. | Each | |
18-8 Stainless Steel | |||||
| 3/8"-16 | 3/8" | 11/16" | 3/8" | 000000000 | 00000 |
Cap Nut Assortments
Cover and protect threads while providing a finished appearance.
Nickel-plated steel cap nuts have excellent resistance to chemicals and salt water and have a decorative metallic finish.
18-8 stainless steel cap nuts are chemical resistant and may be mildly magnetic.
