3b 1st end thread class 16 1st end thread quantity per inch black polytetrafluoroethylene coated to a distance of 0.365 in. min, 0.390 in. max into id of second end, and on outside, except for 0.250 in. band located 1.195 in. from band center to second end unj 1st end thread series
3a 2nd end thread class fitting shall be polytetrafluoroethylene coated on interal surface only to a distance of 0.190 min 0.240 max in. deep passivate surface treated unjf 2nd end thread series
Used on aircraft application. 3a all ends thread class 12 1st end bulkhead thread quantity per inch two opposite hex flats marked with equilateral triangles to denote precision type anodize inside surface treated unj 1st end bulkhead thread series
3a 2nd end thread class 12 2nd end thread quantity per inch 2nd end bulkhead thd 1.062-12 in., cl 3a, unj passivate surface treated unj 2nd end thread series
Used on aircraft, f/a-18. 3b 1st end thread class 16 1st end thread quantity per inch polytetrafluoroethylene coated black, for swaged end, 0.365 in. to 0.390 in.; weapon system essential unjs 1st end thread series
3a 2nd end thread class 14 2nd end thread quantity per inch polytetrafluoroethylene coated black, distance v into first end bore 0.350, o/a outside except for 0.250 wide band on 1st leg, 1.070 from end unjs 2nd end thread series
3b 1st end thread class 18 1st end thread quantity per inch body polytetrafluoroethylene coated, black, 0.410 in. to 0.435 in. for swaged end unjs 1st end thread series
Used on aircraft, f/a-18. 3b 1st end thread class 14 1st end thread quantity per inch black polytetrafluoroethylene coated to a distance of 0.325 in. min. 0.350 in. max into second end id, and on od, except for 0.250 in. band located 0.335 in. from band center to second end; weapon system essential unjs 1st end thread series
3b 1st end thread class 24 1st end thread quantity per inch black polytetrafluoroethylene finish 0.190 in. to 0.240 in. into id of second end, and on od of second leg, except for 0.250 in. band located 0.510 in. from end unjs 1st end thread series
Used on aircraft, hornet f/a-18. 3b 1st end thread class 20 1st end thread quantity per inch drilled for lockwire; weapon system essential unj 1st end thread series
