Parker Hannifin Corporation
Fluid System Connectors
Otsego, Michigan
N18
Catalog 3501E
General Technical
Port End Thread Size Ranges
NPT
BSPT
BSPP
THREAD
1/16
1/8
1/8
M3X0.5
1/8
1/4
1/4
M5X0.8
1/4
3/8
3/8
M10X1
3/8
1/2
1/2
M12X1,5
1/2
3/4
3/4
M14X1,5
3/4
1
M16X1,5
1.1/4
M18X1,5
1.1/2
M22X1,5
2
Parker fitting part numbers are
constructed from symbols that
identify the size, shape or style,
type and material of the fitting.
Fitting Style
B
Nut
C
90
° male elbow connector
C6
90
° male elbow connector, swivel
CD
90
° male/female elbow adapter
CD43
90
° male/female BSPT/BSPP adapter
D
90
° female elbow connector
DD
90
° female elbow adapter
DD44
90
° female BSPP elbow adapter (DD4
in USA)
E
90
° elbow union connector
F
Straight thread stud connector
(
male connector)
FF
Straight thread long connector or
male straight adapter
FG
Male to female adapter, straight
FF33
Male BSPT straight adapter
FF44
Male BSPP straight connector
FG
Male/female jump size adapter
FG43
Male/female BSPT/BSPP jump size
adapter (F3G4 in USA)
FN
Cap
G
Female straight connector
GG44
Female BSPP straight adapter (GG4
in USA)
H
Straight union connector
HHP
Hollow hex head plug
HHP3
BSPT hollow hex head plug
HP3
BSPT hollow hex head plug
J
Union tee connector
K
Union cross connector
KMM00
Female cross adapter
KMM004
Female BSPP cross adapter
MMO
Female tee adapter
MMO444
Female BSPP tee adapter
MMS
Female/female/male tee adapter
MMS443
Female/female/male BSPP/BSPP/BSPT
tee adapter
PN
Plug
PTR34
Male/female BSPT/BSPP reducing
adapter
PTR44
Male/female BSPP reducing adapter
(
PTR4 in USA)
R
Male stud run tee connector
R6
Male run tee connector, swivel
S
Male stud branch tee connector
S6
Male branch tee connector, swivel
T
Sleeve
T2HF
Standpipe to male
T2HG
Standpipe to female
T23
Insert (for thin walled or plastic
tube)
T23HF
Standpipe to male BSPT
T24HG
Standpipe to female
T28HF
Standpipe to metric straight thread
TE
Tube end size jumper
TR
Tube end reducer
W
Straight bulkhead union connector
WE
90
° bulkhead union elbow
connector
WGG
Straight female bulkhead adapter
WGG44
Straight female BSPP bulkhead
adapter (WGG4 in USA)
Thread Type (Port End)
Without
NPT (brass, stainless) - NPTF
(
steel)
2
NPTF
3
BSPT (male only)
4
BSPP (male or female)
40
BSPP O-Ring and retaining
ring (male) only
41
BSPP cutting seal (male only)
6
Swivel nut (swivel end)
63
Adjustable swivel connector
with BSPT thread
64
Adjustable swivel connector
with BSPP thread
68
Adjustable swivel connector
with metric parallel thread
69
Adjustable swivel connector
with metric taper thread
7
(
Metric taper in USA)
8
Metric parallel
80
Metric parallel O-Ring and
retaining ring (male only)
81
Metric parallel cutting seal
(
male only)
85
Metric parallel Eolastic
seal (male only)
0
With O-Ring
Fitting Type
M
Metru-Lok
P
Presto-Lok
Fitting Material
B
Brass
K
Plastic
Tube Size
Dash
Tube
No.
O.D.
4
4
mm
6
6
mm
8
8
mm
10
10
mm
12
12
mm
14
14
mm
16
16
mm
18
18
mm
20
20
mm
22
22
mm
F
3
B M
B 4 - 1/8
Assembled Fitting
Without
Unassembled fitting.
i.e. fitting adapter for
use with hose fittings,
etc.
B
Assembled fitting
except for Prestolok
upgraded versions
(
plastic and brass)
Metric Fitting Nomenclature