Specification :

I list the size of blank tubing coupling for manufacturing finished coupling for your reference, if you interested, pls let us know, we will give a good price.

Size of Blank coupling without threading:
Size Type OD* WT( mm) Cut length
2-3/ 8" NU 74* 11 110-113mm
EU 79* 11 127-130mm

2-7/ 8" NU 88.9* 12.5 132 -135mm
EU 94* 13 136-139mm

3-1/ 2" NU 108* 14 146-148mm
EU 115* 15 149-151mm

4 " NU 121* 14.5 149-151mm
EU 127* 16 155-157mm

4-1/ 2" NU 133* 14.5 159-160mm
EU 142* 16 161-163mm