3a 1st end thread class 2 2nd end bolt hole quantity with tube extension, 0.500 in. od by 0.930 in. lg, attached to rear of flange cadmium tube surface treated unf 1st end thread series
4 2nd end bolt hole quantity boss 2.13 in. cen to first end inside curve of elbow, 1.00 in. od, 0.5625-18unjf-3b per MS33649-6; boss 1.75 in. cen to second end outside curve, 0.80 in. od, 0.4375-20unjf-3b per MS33649-4
Used on aircraft application. 3a 1st end thread class 2 2nd end bolt hole quantity 16 1st end thread quantity per inch anodize surface treated un 1st end thread series
3a 1st end thread class 3 2nd end bolt hole quantity 12 1st end thread quantity per inch od of raised face grooved to dia. 0.991 in. 0.228 in. wide anodize inside surface treated uns 1st end thread series
2a 1st end thread class 3 2nd end bolt hole quantity 12 1st end thread quantity per inch od of raised face grooved to dia. 1.293 in. 0.222 in. wide anodize inside surface treated uns 1st end thread series
3a 1st end thread class 4 2nd end bolt hole quantity 12 1st end thread quantity per inch od of raised face hasgroove to dia. 0.991 in. 0.228 in. wide anodize inside surface treated uns 1st end thread series
3a 1st end thread class 4 2nd end bolt hole quantity 12 1st end thread quantity per inch ilet second end, left hand side, 0.060 in min dia, 0.080 in max dia uns 1st end thread series
2a 1st end thread class 9 2nd end bolt hole quantity 16 1st end thread quantity per inch bolt holes on flange face furnished with threaded rivets un 1st end thread series
