National Hardware 4003BC Coupler, Thread Type: UNC Coarse, Thread Size: 1/4-20, Hex Size: 0.37 in, 650 lb Tensile Strength, Thread Length: 0.88 in, Steel, Zinc-Plated, Dimensions: 0.88 in L
Manufacturer: NATIONAL HARDWARE Model Number: N182-667 UPC: 038613182660
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