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The 3/4-10 UNC, 2-1/4 OAL Steel Standard Coupling Nut is a heavy duty fastener ideal for applications requiring maximum tensile strength and security. Its coupling feature enables easy assembly while its steel construction ensures durability and resistance to wear and corrosion in harsh environments. With an overall length of 2-1/4, this coupling nut provides secure connection between two threads without protruding beyond the surface, making it suitable for use in industries ranging from automotive and aerospace to general manufacturing.