1-5/8

20 AN Straight Swivel Hose End Fitting Aluminum Black. Size: AN20 swivel hose end fitting. Thread: 1-5/8x12, straight. Feature: 360° Swivel design for easy assembly. It can be reused and recycle. Application: Work with stainless braided hose and nylon braided hose, not use for PTFE hose.