Check the listing for details. TP PD341 - Aftermarket Flat Face Diagnostic Nipple 1/4 MORB. Condition: New. Listed at 11.71 USD. Aftermarket Flat Face Diagnostic Nipple 1/4 MORB (Parker PD341 Aeroquip FD90-1044-04-04) SAE O-RING BOSS THREAD CHART - THREAD SIZE MEASUREMENT TAKEN FROM OUTSIDE DIAMETER OF MALE THREADSSAE O-Ring Boss fittings seal with an o-ring at the base of the male fitting against a chamfered area on the female port. SAE O-ring boss is typically seen in porting appications such as cylinders pumps motors and valves. Thread pitch is the same as JIC 37 degree flare in all sizes. Tube Size (Nominal Size) Dash Size Thread Size O-Ring 1/8"- 25/16" - 242-902/N93/16"- 33/8" - 242-903/N91/4"- 47/16" - 202-904/N95/16"- 51/2" - 202-905/N93/8"- 69/16" - 182-906/N91/2"- 83/4" - 162-908/N95/8"- 107/8" - 142-910/N93/4"- 121-1/16" - 122-912/N97/8"- 141-3/16" - 122-914/N91"- 161-5/16" - 122-916/N91-1/4"- 201-5/8" - 122-920/N91-1/2"- 241-7/8" - 122-924/N92"- 322-1/2" - 122-932/N9