... :Water Oil Gas ISO9001&CE Approve Hexagon Head Cap 1/8"-4" Specifcation:1. For general chemical and industrial services2. Applicable Medium: Water ... . Thread: BSP NPT DIN5. Dimension: 1/8", 1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 4"6. Work pressure ...