Page 508 - 2019 PRODUCT TECHNICAL MANUAL - HYDRAULICS V4-8
P. 508
TECHNICAL
THREAD AND CONNECTOR IDENTIFICATION
JIS THREADS
JIS IS JAPANESE INDUSTRIAL STANDARDS There are four popular coupling styles in Japan.
1. JIS TAPERED PIPE THREAD.
Thread form per JIS B 0203 (identical to BSPT)
Refer to BSPT section for dimensions of threads.
• The Japanese tapered pipe thread connector is identical to and interchangeable with the BSPT (tapered) connector.
• The Japanese male thread does not have a 30° Flare, and will not mate with the BSPP female swivel with conical seat. The seal on the Japanese tapered pipe thread connector is made on the threads.
• Use of a thread sealant is recommended.
2. JIS 30° FLARE (FEMALE INTERNAL CONE SEAT).
Thread form per JIS B 0202 (identical to BSPP)
Refer to BSPP section for dimensions of threads.
• This connection uses a 60° concave (inverted) seat and British Standard Pipe Parallel threads.
• They are not interchangeable with BSPP conical seat couplings, because the cone seats are opposite.
3. JIS 30° FLARE (FEMALE INTERNAL CONE SEAT).
Thread form per JIS B 0207
• Threads commonly used on Komatsu equipment (30° cone) have metric thread form. See table opposite.
MALE THREAD OD & PITCH
DASH SIZE
FEMALE THREAD ID
KOMATSU®
JIS B 8363
mm
mm
M14 x 1,5
-14
12,5
M16 x 1,5
-16
14,5
M18 x 1,5
-18
16,5
M22 x 1,5
-22
20,5
M24 x 1,5
-24
22,5
M27 x 2,0
-27
25,0
M30 x 1,5
-30
28,5
M33 x 1,5
-33
31,5
M33 x 2,0
-33
31,0
M36 x 1,5
-36
34,5
M42 x 1,5
-42
40,5
M50 x 2,0
-50
48,0
M60 x 2,0
-60
58,0
4. KOMATSU® STYLE FLANGE FITTING JIS B 8363
• The Komatsu® style Flange fitting is nearly identical to, and fully interchangeable with, the SAE Code 61 flange fitting*.
• The O Ring dimensions are different between all sizes.
• When replacing a Komatsu® style flange with an SAE style flange, an SAE style O Ring must always be used.
• * 5/8” is not in the SAE Standards.
BSPT & BSPP THREAD DIMENSIONS
BSPT & BSPP SIZE & PITCH
DASH SIZE
BSPT MALE THREAD OD
BSPP MALE THREAD OD
BSPT FEMALE THREAD ID
BSPP FEMALE THREAD ID
inch - TPI
1/4 -19 1/2 - 14 3/4 -14 1.1/4 - 11 2 - 11
3 -11
-04 -08 -12 -20 -32 -48
mm
12,8 20,4 25,9 41,1 58,6 86,6
inch
0.50 0.80 1.02 1.62 2.31 3.41
mm
13,0 20,8 26,3 41,8 59,5 87,9
inch mm inch mm inch
0.51 11,2 0.44 11,9 0.47 0.82 18,3 0.72 19,1 0.75 1.04 23,9 0.94 24,6 0.97 1.64 38,6 1.52 39,4 1.55 2.34 56,4 2.22 57,4 2.26
3.46 84,6 3.33 85,4 3.36
Thread size refers to the nominal bore of the pipe. Subtract approx.1/4" (6 mm) from thread diameter measurement for nominal pipe size.
Pitch is Threads Per Inch (TPI).
"Gas", "R" & "G" also refer to BSP. "Male Iron (Pipe)" may be BSP or NPT.
1/8 - 28
-02
9,5
0.37
9,6
0.38
8,4
0.33
8,6
0.34
3/8 - 19
-06
16,3
0.64
16,5
0.65
14,7
0.59
15,2
0.60
5/8 - 14
-10
22,5
0.89
22,8
0.90
20,6
0.81
20,8
0.82
1 - 11
-16
32,6
1.28
33,1
1.30
29,7
1.17
30,7
1.21
1.1/2 - 11
-24
47,0
1.85
47,7
1.88
44,5
1.75
45,5
1.79
2.1/2 - 11
-40
74,1
2.92
75,1
2.95
71,9
2.83
72,6
2.86
506
RYCO QUALITY
