BaerCoil Thread Insert Metric - M20 x 2.5 - 3 X DBaerCoil Metric Thread Insert, M20 x 2. 5 with a 3 D length, is engineered for demanding metal assemblies where strong, durable threads matter. Designed for professionals who need reliable thread reinforcement and repair, this insert delivers superior performance in a compact, corrosionresistant package. Size and length: M20 x 2. 5 thread insert with a length of 3 D for robust engagement and load distribution. Material: Austenitic stainless steel