Our Black Steel fittings are manufactured in accordance with ASME B16.14 - 1991 Standards. All Threads are Dryseal (NPTF) - 3/4 inch taper per foot and are made of Carbon Steel 12L14.
- Clear Zinc plating specifications ASTM B633-07 
- Federal Specification QQ-Z-325 (Zinc Plate) 
- Type III with supplemental clear trivalent chromate 
- 00015" Zinc (Minimum) • ROHS Compliant 
- Pressure rating: 150/300 PSI