1/2" Stainless Steel Nipple x 1/2" NPT Female NPT with max working pressure of 15,000PSI
 
Thread Size: 1/2" 
Thread Type: NPT
Max Working Pressure: 15,000 PSI (1050 Bar)
 
These nipples are typically used in water blast applications and fit together with the CRS-SS-08-08C-NPT female coupler to complete the quick connect unit.