Item Type: Adapter Fitting - Male O-ring Boss X Female Pipe Swivel
Nominal Size: 5/16 Male O-ring Boss X 1/4 Female Pipe Swivel
Material: Plated Steel

Alternate Part Numbers:

Aeroquip 2066-4-5S
Parker 0507-5-4-S
Weatherhead 9315X5X4

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


NPTF (PIPE) THREAD CHART - THREAD SIZE MEASUREMENT TAKEN FROM OUTSIDE DIAMETER OF MALE THREADS
Dryseal American Standard Taper Pipe Thread (NPTF) which is usually reffered to as just pipe thread or tapered pipe thread seals in one of two ways.  The first method is interferance between the threads on the male and female connectors - a thread sealant is typically used in this application.  The second method is 30° inverted flare on the nose of the fitting.  This is typically used when connecting a male connector to a female swivel connector.  In this application thread sealant is not used.
 Dash Size 
 Nominal Size 
 Thread Size 
- 2
1/8"
.405" - 27
- 4
1/4"
.540" - 18
- 6
3/8"
.675" - 18
- 8
1/2"
.840" - 14
- 12
3/4"
1.050" - 14
- 16
1"
1.315" - 11.5
- 20
1-1/4"
1.660" - 11.5
- 24
1-1/2"
1.900" - 11.5
- 32
2"
2.375" - 11.5