When tightening opposing thread styles (BSP and NPT) you will experience more interference sooner and you will not be able to tighten the fitting as far as like-threads

straight round-head pliers

20015 WIDER2-S WIDER2-15K1S

Comfortable Fit: The Z-Link system is designed for compatibility with other safety gear

This feature makes for easy maintenance on your rotary screw

Graco 113933 FITTING ELBOW STREET 45 DEG. quote-button-simple When tightening opposing thread stylesSpecifications UPC Product: 00633955761223 Family Code: FAMCNV Unit of Measure: EA Height: 2. 4 IN 6. 096 CM Length: 2. 4 IN 6. 096 CM Width: 1. 2 IN 3. 048 CM Volume: . 004 FT3 0 M3 Shipping Weight: . 13 LBS . 06 KG