... to drawing or sample coating: black; zinc, HDG, SPECIAL PARTS WITH INNER THREAD 1) Standards: SPECIAL2) Material: carbon steel ,STAINLESS STEEL3) Size ... "--3/4"4)Coating:ZINC ,HDG, BRIGHT,DAC,GOMET, PASSIVATED5)Thread:UNC,UNF,METRIC 6) Quality control :ISO 90017)Package :Small ... )Delivery: 30 days or depend on the qty special parts with inner thread