3a 1st end bulkhead thread class 12 1st end bulkhead thread quantity per inch aluminum surface treated flared w/ bulkhead thread un all ends thread series
3a all ends thread class drilled for lockwire 0.064 min. 0.076 max in. dia passivate surface treated flared w/ center wrenching facility unf all ends thread series
Used on sukorsky helicopter. 3a all ends thread class color yellow; filtered restrictor 0.197 in. dia, 0.550 in. lg; 1.44-2.16 gpm flow flared w/ center wrenching facility unjf all ends thread series
3a all ends thread class color yellow; pressed in fit restrictor 0.220 in. dia, 0.250 in. lg, chamfer 45 deg flared w/ center wrenching facility unjf all ends thread series