15MX98K8-OP
PARKER - AUTOCLAVE ENGINEERS , 15MX98K8-OP , 316SS , 15000 PSI , LOT OF 2 , USED
This one's made from hardened steel, so it doesn't deform when you torque it hard.
PARKER - AUTOCLAVE ENGINEERS , 15MX98K8-OP , 316SS , 15000 PSI , SURPLUS
The model is marked as Various, so you can rely on its flexibility.