公制JIS/ISO JIS/ISOM1X0.25#2-56UNCM1.2X0.25 #3-48UNCM1.4X0.30 #4-40UNCM1.6X0.35 #5-40UNCM2X0.25(F) #6-32UNCM2X0.40 #8-32UNCM2.3X0.40 #10-24UNCM2.5X0.45 #12-24UNCM2.6X0.45M3X0.35(F)1/8-40UNCM3X0.50 1/4-20UNCM3.5X0.35(F)5/16-18UNC M3.5X0.6 3/8-16UNCM4X0.50(F)7/16-14UNC M4X0.701/2-13UNC M4.5X0.50(F)9/16-12UNCM4.5X0.755/8-11UNCM5X0.50(F)3/4-10UNCM5X0.80M6X0.75(F)#0-80UNFM6X1#1-72UNFM7X0.75(F)#2-64UNFM7X1#3-56UNFM8X1(F)#4-48UNFM8X1.25M9X1(F) #5-44UNFM9X1.25#6-40UNF M10X1.25(F)#10-32UNF M10X1.5#12-28UNFM12X1.75(F)#8-36UNFM14X1 M16X2 3/16-32UNFM18X2.5 1/4-28UNFM20X2.5 5/16-24UNFM22X2.5 3/8-24UNFM24X3 7/16-20UNFGPWP PLUG-WROKSHOP(JIS) PLUG-6HGRWR RING-WORKSHOP(JIS)GPIP PLUG-INSPECTION(JIS) RING-6gGRIRRING-INSPECTION(JIS)GPNP PLUG-NORMAL(ISO)GRNRRING-NORMAL(ISO)