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J4
Parker Hannifin Corporation
Tube Fittings Division
Columbus, Ohio
http://www.parker.com/tfd
4300 Catalog
K4 BSP Adapters
Dimensions and pressures for reference only, subject to change.
Table J3 – Dimensions of JIS B8363 60° Cone Connection
Table J4 – Dimensions of BS B5200 60° Cone Connection
Fig. J5 – Illustration Showing Potential
Leakage ProblemWhen Mixing JIS and K4
Components
Fig. J6 – An Effective Seal Created with the
Proper Combination of Components
60° Cone Adapters: JIS vs.
BS5200
Parker’s P4 JIS 60° cone adapters are manufactured in ac-
cordance to JIS B8363 while Parker’s K4 BSP adapters are
manufactured in accordance to BS5200.The following are some
pronounced differences that may help in distinguishing between
the K4 and P4 fittings:
1. Thread length ( “A” dimensions)
2. 60° angle diameter (“B” dimensions)
3. The undercut area (area between threads and hex body)
on the straight K4 fittings incorporates a bonded seal
“locating pilot” for bonded seal
4. Parker’s JIS fittings are stamped with “JIS” on the forging
body or hex of fitting
See Figs. J3 and J4 for details and se
e
Tables J3
a
nd
J4
b
elow
for specific dimensional differences.
Fig. J3 – JIS B8363 60° Cone
Connection (P4)
Fig. J4 – BS B5200 60° Cone
Connection (K4)
While the 60° cone versions of JIS and K4 fittings utilize the
same BSPP threads and seat angle, not all dimensions are
consistent. Therefore, they cannot be interchanged because
the differences can cause leakage problems. An example of
this is illustrated in Fig. J5.
In summary, interchanging components between JIS and K4
adapters can, in some cases, lead to leakage problems and thus
is not a recommended practice. The combination of matching
proper components will create an effective seal as illustrated
in Fig J6.
Size
BSPP
Thread
M
A
B
2
1/8-28
0.38
0.418
0.276
4
1/4-19
0.51
0.570
0.394
6
3/8-19
0.65
0.609
0.531
8
1/2-14
0.82
0.726
0.650
12
3/4-14
1.04
0.805
0.866
16
1-11
1.30
0.883
1.102
20
1 1/4-11
1.64
0.945
1.417
24
1 1/2-11
1.87
0.962
1.654
32
2-11
2.34
1.102
2.126
Size
BSPP
Thread
M
A
B
2
1/8-28
0.38
0.315
0.295
4
1/4-19
0.51
0.433
0.409
6
3/8-19
0.65
0.472
0.551
8
1/2-14
0.82
0.551
0.689
10
5/8-14
0.90
0.630
0.760
12
3/4-14
1.04
0.630
0.902
16
1-11
1.30
0.748
1.130
20
1 1/4-11
1.64
0.787
1.449
24
1 1/2-11
1.87
0.866
1.681
32
2-11
2.34
0.984
2.150