日本JPG美制螺紋規 常用規格如下：美制粗牙UNC美制粗牙UNC 美制幼牙UNF美制幼牙UNF1-64UNC7/16-14UNC 1-72UNF7/16-20UNF2-56UNC1/2-13UNC 2-64UNF1/2-20UNF3-48UNC9/16-12UNC 3-56UNF9/16-18UNF4-40UNC5/8-11UNC 4-48UNF5/8-18UNF5-40UNC3/4-10UNC 5-44UNF3/4-16UNF6-32UNC7/8-9UNC 6-40UNF7/8-14UNF8-32UNC1"-8UNC 8-36UNF1"-12UNF10-24UNC1":1/8-7UNC 10-32UNF1"1/8-12UNF12-24UNC1"1/4-7UNC 12-28UNF1"1/4-12UNF1/4-20UNC1"3/8-6UNC 1/4-28UNF1"3/8-12UNF5/16-18UNC1"1/2-6UNC 5/16-24UNF1"1/2-12UNF3/8-16UNC1"3/4-5UNC 3/8-24UNF