Material Material |
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System of Measurement System of Measurement |
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Thread Size Thread Size |
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For OD For OD |
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Profile Profile |
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 | Straight |
Inside Height Inside Height |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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For Connection Type For Connection Type |
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Maximum Temperature Maximum Temperature |
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Specifications Met Specifications Met |
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Flexibility Flexibility |
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For Surface Type For Surface Type |
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Cap Nut Profile Cap Nut Profile |
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 | Standard |
About Nuts, Materials, and Finishes
More
Metal Round Caps
More durable than plastic caps, these provide the most protection from abrasion and impact.
Aluminum caps have good corrosion resistance, are lightweight, and are nonmagnetic.
For technical drawings and 3-D models, click on a part number.
Aluminum | ||||
|---|---|---|---|---|
| For OD | For Pipe Size | Inside Ht. | Each | |
Caps | ||||
| 1" | __ | 23/32" | 00000000 | 00000 |
| 1 1/4" | __ | 3/4" | 00000000 | 0000 |
| 1 1/2" | __ | 21/32" | 00000000 | 0000 |
| 2" | __ | 1 7/32" | 00000000 | 0000 |
| 2 1/4" | __ | 1 1/16" | 00000000 | 0000 |
| 2 1/2" | __ | 1 5/16" | 00000000 | 0000 |
| 3" | __ | 1 1/8" | 00000000 | 0000 |
Caps for Unthreaded Pipe | ||||
| 35/64" | 1/4 | 7/16" | 00000000 | 0000 |
| 43/64" | 3/8 | 9/16" | 00000000 | 0000 |
| 27/32" | 1/2 | 7/16" | 00000000 | 0000 |
| 1 3/64" | 3/4 | 5/8" | 00000000 | 0000 |
| 1 5/16" | 1 | 11/16" | 00000000 | 0000 |
| 1 21/32" | 1 1/4 | 13/16" | 00000000 | 0000 |
| 1 29/32" | 1 1/2 | 15/16" | 0000000 | 0000 |
| 2 3/8" | 2 | 1 1/16" | 0000000 | 0000 |
| 2 7/8" | 2 1/2 | 1 3/8" | 0000000 | 0000 |
| 3 1/2" | 3 | 1 3/8" | 0000000 | 00000 |
| 4" | 3 1/2 | 1 1/2" | 0000000 | 00000 |
| 4 1/2" | 4 | 1 7/8" | 0000000 | 00000 |
| 5 9/16" | 5 | 1 7/8" | 00000000 | 00000 |
| 6 5/8" | 6 | 1 7/8" | 0000000 | 00000 |
Threaded Caps
Protect externally threaded components from contaminants during fabrication and storage.
Aluminum caps withstand temperatures up to 650° F, which is more than four times as high as plastic caps. They are also more abrasion resistant. All meet military specification MIL-C-5501/3 for dust and moisture protection.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||
|---|---|---|---|---|---|---|---|---|
| Size | Type | For OD | Inside Ht. | Max. Temp., °F | Specifications Met | Pkg. Qty. | Pkg. | |
Aluminum | ||||||||
For Straight-Thread Pipe | ||||||||
| 5/16"-24 | UNF | 5/16" | 21/64" | 650° | MIL-C-5501/3 | 50 | 0000000 | 000000 |
| 3/8"-24 | UNF | 3/8" | 19/64" | 650° | MIL-C-5501/3 | 50 | 0000000 | 00000 |
| 7/16"-20 | UNF | 7/16" | 15/32" | 650° | MIL-C-5501/3 | 50 | 0000000 | 0000 |
| 1/2"-20 | UNF | 1/2" | 7/16" | 650° | MIL-C-5501/3 | 50 | 0000000 | 00000 |
| 9/16"-18 | UNF | 9/16" | 15/32" | 650° | MIL-C-5501/3 | 50 | 0000000 | 00000 |
| 5/8"-18 | UNF | 5/8" | 33/64" | 650° | MIL-C-5501/3 | 50 | 0000000 | 00000 |
| 3/4"-16 | UNF | 3/4" | 35/64" | 650° | MIL-C-5501/3 | 50 | 0000000 | 00000 |
| 7/8"-14 | UNF | 7/8" | 21/32" | 650° | MIL-C-5501/3 | 50 | 0000000 | 00000 |
ForUNStraight-Thread Pipe | ||||||||
| 1 1/16"-12 | UN | 1 1/16" | 49/64" | 650° | MIL-C-5501/3 | 25 | 0000000 | 00000 |
| 1 5/16"-12 | UN | 1 5/16" | 49/64" | 650° | MIL-C-5501/3 | 25 | 0000000 | 00000 |
| 1 5/8"-12 | UN | 1 5/8" | 23/32" | 650° | MIL-C-5501/3 | 10 | 0000000 | 00000 |
Threaded Standoff Caps
Give open-ended standoffs a finished look and protect them from dirt and debris.
Aluminum caps have good corrosion resistance, are lightweight, and are nonmagnetic.
For technical drawings and 3-D models, click on a part number.
Threaded Round Plugs for 37° Flared Tube
Designed to fit into 37° flared connections such as those found on JIC and SAE fittings, these plugs protect internally threaded connections from contaminants during fabrication and storage. Install them manually.
Aluminum plugs withstand temperatures up to 650° F, which is more than four times as high as polyethylene plugs. They are also more abrasion resistant.
For technical drawings and 3-D models, click on a part number.
| Thread Size | For Tube OD | Ht. | Max. Temp., °F | Pkg. Qty. | Pkg. | |
Aluminum | ||||||
|---|---|---|---|---|---|---|
| 3/8"-24 | 3/16" | 3/8" | 650° | 25 | 0000000 | 000000 |
| 7/16"-20 | 1/4" | 15/32" | 650° | 50 | 0000000 | 00000 |
| 1/2"-20 | 5/16" | 15/32" | 650° | 50 | 0000000 | 00000 |
| 9/16"-18 | 3/8" | 1/2" | 650° | 50 | 0000000 | 00000 |
| 5/8"-18 | 3/8" | 1/2" | 650° | 25 | 0000000 | 00000 |
| 3/4"-16 | 1/2" | 19/32" | 650° | 50 | 0000000 | 00000 |
| 7/8"-14 | 5/8" | 11/16" | 650° | 25 | 0000000 | 00000 |
| 1 1/16"-12 | 3/4" | 21/32" | 650° | 25 | 0000000 | 00000 |
| 1 5/16"-12 | 1" | 23/32" | 650° | 10 | 0000000 | 00000 |
| 1 7/8"-12 | 1 1/2" | 7/8" | 650° | 5 | 0000000 | 00000 |
Threaded Round Plugs for Straight-Thread Pipe
Seal tube and hose fittings to keep their straight threads protected from contaminants during fabrication and storage.
Aluminum plugs withstand temperatures up to 650° F, which is more than four times as high as polyethylene and nylon plugs. They are also more abrasion resistant. Install them manually.
For technical drawings and 3-D models, click on a part number.
| Thread Size | For Tube OD | Ht. | Max. Temp., °F | Pkg. Qty. | Pkg. | |
| 5/16"-24 | 5/32" | 11/32" | 650° | 25 | 0000000 | 000000 |
| 3/8"-24 | 3/16" | 9/32" | 650° | 25 | 0000000 | 00000 |
| 7/16"-20 | 1/4" | 9/32" | 650° | 25 | 0000000 | 0000 |
| 1/2"-20 | 5/16" | 5/16" | 650° | 25 | 0000000 | 0000 |
| 9/16"-18 | 3/8" | 5/16" | 650° | 25 | 0000000 | 0000 |
| 5/8"-18 | 3/8" | 5/16" | 650° | 25 | 0000000 | 0000 |
| 3/4"-16 | 1/2" | 7/16" | 650° | 25 | 0000000 | 00000 |
| 7/8"-14 | 5/8" | 1/2" | 650° | 25 | 0000000 | 00000 |
| 1 1/16"-12 | 3/4" | 15/32" | 650° | 25 | 0000000 | 00000 |
| 1 5/16"-12 | 1" | 7/16" | 650° | 25 | 0000000 | 00000 |
| 1 7/8"-12 | 1 1/2" | 5/8" | 650° | 5 | 0000000 | 00000 |
Metal Square Plugs
More durable than plastic plugs, these provide the most protection from abrasion and impact. Use them to eliminate sharp edges and create a finished look on metal fence and machine-guard posts. Drive them in place with a hammer for a secure fit.
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.