1. API 20E-2 BOP side door bolts API20E2

2. ASTM A320/A320M-2018 "Standard Specification for Alloy Steel and Stainless Steel Bolting Materials for Low Temperature" series of external threaded fastener products: Common grades in this standard: Gr.L7, L7M, L43, etc.

3. Specifications: Metric M20-M160, Metric 1"-6"

4. Applicable to: industrial high and medium pressure valves; marine, shipbuilding, chemical, fluid engineering; pressure vessels, pressure pipelines; petrochemical equipment; new energy, environmental protection equipment and other low temperature and high pressure environments.

5. Surface treatment: natural color, phosphating, blackening, galvanized (Zn), Dacrotized, Xylan coating.