美国进口BECO螺纹规，BECO螺纹塞规、BECO螺纹环规
Connection Sizes: 3-1/2" to 8"（3-1/2"; 4"; 4-1/2"; 5-1/4"; 6"; 8"; 10".）
2 Threads per Inch；每英寸2牙
3"Taper per Foot；没英尺 3度
60° included flank angle；60度牙型角
HBPV螺纹规。LP螺纹规、PTF-SPL螺纹规、NPT螺纹规
苏州螺纹规、无锡螺纹规、上海螺纹规、南通螺纹规、浙江螺纹规、宁波螺纹规、盐城螺纹规、淮安螺纹规、常州螺纹规、南京螺纹规、镇江螺纹规、扬州螺纹规、合肥螺纹规、天津螺纹规、北京螺纹规、温州螺纹规、API螺纹规、石油螺纹规、LP螺纹规、ACME螺纹规、HBPV螺纹规、EU螺纹规、进口螺纹规、美国螺纹规、德国螺纹规、英国螺纹规、法国螺纹规、GSG、JPG、JPG、OSG、黑田、greenfield、HEMCO Gage、Gage Assembly、PMC
