Threaded plug for normal vent port.  Threads are 1.625″-12 and requires a 17211_ _ o-ring for mounting.

Part Numbers:

3013AL – Aluminum

3013ZC – Zinc Plated Steel

3013SS – 316 Stainless

Mounting O-ring (order separately:
17211BN – Buna-N
17211EP – EPDM
17211FS – Fluorosilicone
17211TF – PTFE
17211VB – FKM Type B
17211VT – FKM Type A