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Left-Hand Threaded Medium-StrengthSteel Heavy Hex Nuts—Grade 5

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Left-Hand Threaded Medium-StrengthSteel Heavy Hex Nuts—Grade 5 Left-Hand Threaded Medium-StrengthSteel Heavy Hex Nuts—Grade 5 These nuts tighten when turned to the left; once fastened, they resist loosening from counterclockwise motion. About 10% wider and taller than standard hex nuts, these heavy hex nuts distribute the load over a large area.