API standard Safty Clamp API 7K and ISO 9001/2000 inspection OEM interchangeable good hardened and tempered API standard Safty ClampHNA plants are specialized in producing wide range ... pumps and so on.All items are manufactured accordingly to API-7K standards. Parts are interchangeable on these popular pump ... for WIRTH, OPI, Ellis Williams, Wilson, Gaso, Skytop/Brewster. API standard Safty Clamp