Back Home / Fasteners / Nuts / HEX JAM NUT STAINLESS 1/2″-20 HEX JAM NUT STAINLESS 1/2″-20 SKU: XJN1220SS Categories: Fasteners, Nuts A hex nut which is only 2/3 the thickness of a full form nut. Jam nuts are tightened against the work surface and a finished or heavy hex nut is tightened against the jam nut to keep it from loosening. Made from stainless steel. Size: 1/2-20″. Case Quantity: 50 Log In For Pricing