公制螺纹环规(一对）耐磨特殊量具用钢，淬火并打磨。NO和NOGO各，规格清楚的标明公差为6g符合德国DIN13质量生产标准型号尺寸公差KT5-220-379M1.0×0.256gKT5-220-380M1.2×0.256gKT5-220-291M1.4×0.306gKT5-220-292M1.6×0.356gKT5-220-381M1.8×0.356gKT5-220-293M2.0×0.406gKT5-220-382M2.2×0.456gKT5-220-294M2.5×0.456gKT5-220-57M3.0×0.506gKT5-220-383M3.5×0.606gKT5-220-59M4.0×0.706gKT5-220-60M5.0×0.806gKT5-220-61M6.0×1.006gKT5-220-384M7.0×1.006gKT5-220-62M8.0×1.256gKT5-220-385***.0×1.256gKT5-220-63M10.0×1.506gKT5-220-386M11.0×1.506gKT5-220-64M12.0×1.756gKT5-220-388M14.0×2.006gKT5-220-389M16.0×2.006gKT5-220-390M18.0×2.506gKT5-220-391M20.0×2.506gKT5-220-392M22.0×2.506gKT5-220-393M24.0×3.006gKT5-220-394M27.0×3.006gKT5-220-395M30.0×3.506gKT5-220-396M33.0×3.506gKT5-220-397M36.0×4.006gKT5-220-398M39.0×4.006gKT5-220-399M42.0×4.506gKT5-220-400M45.0×4.506gKT5-220-401M48.0×5.006gKT5-220-402M52.0×5.006gKT5-220-403M56.0×5.506gKT5-220-404M60.0×5.506gKT5-220-405M64.0×6.006gKT5-220-406M68.0×6.006g)