美制圆柱管螺纹（牙型角60 ）公制圆柱螺纹（牙型角60 ）英制圆柱管螺纹（牙型角55 ）螺纹规格小径大径螺纹规格）小径大径螺纹规格小径大径7/16"-UNFM12X?12G1/8"-281/2"-UNFM14X14*G1/4"-199/16"-UNFM16X16G3/8"-19#155/8"-UNFM18X18G1/2"-14•11/16"-UNFM20X20G5/8"-14!3/4"-UNFM22X22G3/4"-1413/16"-UNF~M24X24G7/8"-147/8"-UNF[M26X26G1"-111"-UNF、M27X27G1 1/4"-1111/16"-UNFM30X130G1 1/2"-111 3/16"-UNFM30X228$30G2"-111 5/16"-UNFM36X23436@1 7/16"-UNFM39X237391 5/8"-UNFM42X24042…1 11/16"-UNFM45X24345*1 7/8"-UNFM52X250522" -UNF1M60X258602 1/2"-UNFM64X26264公制 /美制 / 英制螺纹对照表A 型美制螺纹( UNF )常用规格外螺纹 内螺纹-49/16"-19 牙-611/16''-16-813/16''-16-101''-14-121(3/16)''-12-161(7/16)''-12-201(11/16)''-12。