4" x 1/2" Bull Plug Schedule 40 Zinc W/TAP

Conforms to MSS SP-95

NPT threads on nipples conform to ASME B1.20.1

Manufacturing facility is ISO 9001:2008 and ISO 14001

Material conforms to ASTM A234 or ASME SA106

Schedule 40 swage nipples have blue caps

Schedule 80 swage nipples have green caps

All Swage nipples are zinc electroplated