In oil and gas sector to connect eue threded member to any of the api threaded mamber EUE Adaptor sub can be usd. This adaprtor is made in 4145h material and can be costomised in lrnghtb. The OD shall be as per the Biggest member in two connecting members.API EUE (External Upset End) couplings are a type of threaded coupling used to connect two lengths of tubing or casing in the oil and gas industry. They are manufactured according to the standards set by the American Petroleum Institute (API) and are widely used in the industry.

API EUE couplings have a larger diameter at the end of the pipe, which is referred to as an external upset end. This larger diameter creates a thicker wall section, which provides additional strength and durability to the joint. The threaded connection is made by screwing two API EUE couplings together, with the help of a special tool called a casing tong.

API EUE couplings are designed to be interchangeable with other API EUE couplings, which makes them easy to use and reduces the need for multiple types of couplings. They are also designed to withstand the high stresses and pressures of drilling operations, and are made from high-strength materials, such as alloy steel.

Overall, API EUE couplings are an important component in the oil and gas industry, as they enable the safe and efficient connection of tubing and casing, reducing the risk of equipment failure and downtime.