DFU 2005-4 SHACSHAC DFU 2005 4 Double Ball Nut, 20 mm, 5 mm Lead, High Accuracy CNC Nut The SHAC DFU 2005 4 double ball nut is a 20 mm, 5 mm lead nut for compact CNC and automation axes that demand high accuracy and stiffness. Its preloaded twin nut construction keeps backlash very low, giving stable positioning and good surface finish on light and medium duty machines. SHAC is manufactured in China but engineered to compete with Taiwanese linear motion brands,
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