Used on hu25a and hh65a coast guard helicopter. 2a 1st end thread class adapter, straight, tube to boss for HU25a anodize surface treated unf 1st end thread series
Used on centrifugal pump, conhagen alfred inc., model no. xrcny. 2a 2nd end thread class 20 2nd end thread quantity per inch connects 0.25in. o.d. tubing to casing unf 2nd end thread series