Used on forward repair system (frs), model m7; nsn 3990-01-463-4940; tm9-3990-361-23. 2a 1st end thread class 16 2nd end thread quantity per inch unf 1st end thread series
Used on orifice fittings and cords. 0.375" outside diameter added .20 notch, dim .25 to field ex sting uninstalled parts must be changed to conform to revision