Item Type: Adapter Fitting - Male JIC x Female JIC x Female O-Ring Boss - GagePort Fitting
Nominal Size: 3/8 Male JIC x 3/8 Female JIC x 1/4 Female O-Ring Boss - GagePort Fitting
Material: Plated Steel

JIC THREAD CHART - THREAD SIZE MEASUREMENT TAKEN FROM OUTSIDE DIAMETER OF MALE THREADS
JIC 37 degree flare fittings form a metal on metal seal on a 37 degree cone.  Thread pitch is the same as SAE 45 degree flare in most sizes and some female assemblies have a dual 37/45 degree seat for this purpose.  Size 6 and size 12 do not cross over.
 Tube Size (NOMINAL SIZE) 
 Dash Size 
 Thread Size 
1/8"
- 2
5/16" - 24
3/16"
- 3
3/8" - 24
1/4"
- 4
7/16" - 20
5/16"
- 5
1/2" - 20
3/8"
- 6
9/16" - 18
1/2"
- 8
3/4" - 16
5/8"
- 10
7/8" - 14
3/4"
- 12
1-1/16" - 12
7/8"
- 14
1-3/16" - 12
1"
- 16
1-5/16" - 12
1-1/4"
- 20
1-5/8" - 12
1-1/2"
- 24
1-7/8" - 12
2"
- 32
2-1/2" - 12


SAE O-RING BOSS THREAD CHART - THREAD SIZE MEASUREMENT TAKEN FROM OUTSIDE DIAMETER OF MALE THREADS
SAE 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"
- 2
5/16" - 24
2-902/N9
3/16"
- 3
3/8" - 24
2-903/N9
1/4"
- 4
7/16" - 20
2-904/N9
5/16"
- 5
1/2" - 20
2-905/N9
3/8"
- 6
9/16" - 18
2-906/N9
1/2"
- 8
3/4" - 16
2-908/N9
5/8"
- 10
7/8" - 14
2-910/N9
3/4"
- 12
1-1/16" - 12
2-912/N9
7/8"
- 14
1-3/16" - 12
2-914/N9
1"
- 16
1-5/16" - 12
2-916/N9
1-1/4"
- 20
1-5/8" - 12
2-920/N9
1-1/2"
- 24
1-7/8" - 12
2-924/N9
2"
- 32
2-1/2" - 12
2-932/N9