Page 420 - Parker Catalog 4400 - Hose, Fittings and Equipment

Catalog 4400 US Technical

North American Thread Types

This type of fitting uses the thread interface to seal and as such has a tapered thread that
deforms and forms the seal.
They have 30° sealing angle surfaces, forming a 60° inverted (concave) seat.
A A The fittings are most frequently seen on machines of US origin.

Dryseal American Standard
Taper Pipe Thread (NPTF) Size Thread ØA ØB
The NPTF male will mate with the NPTF (mm) (mm)
8.73
NPTF, NPSF, or NPSM females. -2 1/8x27 10.24 11.90
1/4x18
13.61
-4
Care should be taken not to confuse -6 3/8x18 17.05 15.90
the NPTF fitting with the BSPT male -8 1/2x14 21.22 19.05
B fitting. NPTF fittings have a 60° thread -12 3/4x14 26.56 24.60
1x11.5
angle. -16 1-1/4x11.5 33.22 30.95
41.98
-20
39.69
BSPT has a 55° thread angle. ØA dimension is measured on -24 1-1/2x11.5 48.05 45.24
Standard the 4th pitch of the thread -32 2x11.5 60.09 57.15
SAE J516
Parker end configuration
01
C
SAE JIC 37°
Commonly referred to as JIC
fittings, these metal-to-metal sealing B
type fittings have a 37° flare (sealing
surface angle) and straight United
National Fine Threads (UNF).
The original design specification for
ØA
ØB
the fittings comes from the Society Tube O.D. Tube O.D. Thread Size (mm) (mm)
(mm)
UNF
(inch)
D of Automotive Engineers (SAE) and 3/16 3/8x24 -3 8.60 9.50
these fittings are the most common 1/4 6 7/16x20 -4 10.00 11.10
American fitting types in Europe. 5/16 8 1/2x20 -5 11.60 12.70
Standard 3/8 10 9/16x18 -6 13.00 14.30
-8
12
ISO 12151-5, ISO8434-2 and 1/2 14-15-16 3/4x16 -10 17.60 19.10
20.50
22.20
5/8
7/8x14
SAE J516 3/4 18-20 1-1/16x12 -12 24.60 27.00
7/8 22 1-3/16x12 -14 28.30 30.10
Parker JIC hose fittings are fully com- 1 25 1-5/16x12 -16 31.30 33.30
E patible with Parker Triple-Lok Tube 1-1/4 30-32 1-5/8x12 -20 39.20 41.30
45.60
47.60
38
1-7/8x12
1-1/2
-24
Fittings and adapters. 2 2-1/2x12 x32 61.50 63.50
Parker end configurations
03, 06/68, 37/3V, 39/3W, 41/3Y, L9

E-26