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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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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About Nuts, Materials, and Finishes
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Left-Hand Threaded Medium-Strength
Steel Extra-Wide Hex Nuts—Grade 5


These nuts tighten when turned to the left; once fastened, they resist loosening from counterclockwise motion. Also known as heavy hex nuts, they are about 10% wider and taller than standard hex nuts and distribute the load over a large area. They're suitable for fastening most machinery and equipment.
For technical drawings and 3-D models, click on a part number.