#12-14 X 1 ZXL SteelBinder

5/16” Cupped HWH is manufactured from a strong ZAMAC zinc-aluminum alloy, The head is molded. It is not a cap. The molded head encapsulates the EPDM washer, which fits neatly and conforms to the inside of the mold. Head and washer face carry a 40 year warranty against red rust. ZXL is proudly molded in the USA.