Guide to Thread and Connector Working Pressures for Fittings

Guide to Thread and Connector Working Pressures

Working Pressures – Adaptors, hose, couplings and hose assemblies

Since many factors influence the pressure at which a hydraulic system will, or will not, perform satisfactorily, maximum working pressures listed below should be used as a guide only and not as a “standard” nor “specification”, nor construed as a “guaranteed minimum.” Within the fluid power industry, many criteria are used for the determination of pressure capability. Various fibre stresses, minimum yields and design factors are applied, commensurate with total system conditions. Thus, it is impractical to lay down specific allowable working pressures that satisfy all design criteria. Unless otherwise specified in this document, and given correct working conditions, including, but not limited to, torque setting, assembly, alignment, support, pressures (internal and external), temperature limits, environmental, installation, vibration free, damage free, chemical, cleanliness and regular maintenance and inspection, the following may be used as a guide to maximum working pressure. For further technical assistance contact RYCO Hydraulics Technical Department or your RYCO Hydraulics distributor. The maximum Working Pressure of a Hose assembly is the lesser rated Working Pressure of the Hose or Tube or end style (connector termination). The maximum rated Working Pressure of an adaptor with a combination of Thread / end styles and sizes, is the maximum Working Pressure of the least rated end.

BSP

BSP

BSPT
Male

BSPP
Male
BSPT
Male
Live Swivel
BSPT
Female
Fixed
BSPP
Female
Swivel
(Crimp Nut)

BSPP
Female
Swivel
(Wire Nut)

BSPP Male
Non-Adjustable
(O Ring &
Retaining Ring)

BSPP Male
Adjustable
(O Ring &
Retaining Ring)
bspp-male_1301
Thread
Size

Dash
Size

Max. Working Pressure
inch bar psi bar psi bar psi bar psi bar psi bar psi bar psi bar psi
1/8 -02 690 10000 690 10000 420 6100 690 10000 690 10000 350 5100 380 5500
1/4 -04 690 10000 690 10000 420 6100 690 10000 690 10000 350 5100 350 5100
3/8 -06 690 10000 620 9000 420 6100 690 10000 620 9000 350 5100 350 5100
1/2 -08 690 10000 480 7000 350 5100 690 10000 480 7000 350 5100 310 4500
5/8 -10 690 10000 480 7000 280 4100 690 10000 480 7000 550 8000 350 5100
3/4 -12 620 9000 450 6500 280 4100 620 9000 420 6100 420 6100 280 4100 280 4100
1 -16 620 9000 350 5100 215 3100 620 9000 350 5100 350 5100 215 3100 215 3100
1.1/4 -20 480 7000 215 3100 480 7000 215 3100 215 3100 215 3100 170 2500
1.1/2 -24 420 6100 100 1500 420 6100 100 1500 215 3100
2 -32 350 5100 100 1500 350 5100 100 1500 180 2600
2.1/2 -40 215 3100

BSP

BSP BSPP Male (Bonded Seal) BSPP Male (Encapsulated Seal)

Thread
Size
Dash
Size
Maximum Working Pressure

inch

bar psi bar psi
1/8 -02 420 6100 620 9000
1/4 -04 420 6100 620 9000
3/8 -06 420 6100 480 7000
1/2 -08 350 5100 480 7000
5/8 -10 350 5100 480 7000
3/4 -12 280 4100 480 7000
1 -16 280 4100 370 5300
1.1/4 -20 280 4100 280 4100
1.1/2 -24 215 3100 280 4100
2 -32 150 2100 230 3300

NPT

NPT NPT Male NPT Male
Live Swivel
NPT Female
Fixed
NPSM Female
Swivel (Crimp Nut)
NPSM Female
Swivel (Wire Nut)
Thread
Size
Dash
Size
Max. Working Pressure
inch bar psi bar psi bar psi bar psi bar psi
1/8

-02

760

11000

420

6100

760

11000

690

10000

1/4

-04

760

11000

420

6100

690

10000

690

10000

3/8

-06

690

10000

420

5100

690

10000

690

10000

1/2

-08

690

10000

350

5100

690

10000

550

8000

5/8

-10

3/4 -12 690 10000 280 4100 690 10000 450 6500 480 7000
1 -16 500 7200 280 4100 500 7200 350 5100 420 6100
1.1/4 -20 350 5100 350 5100 280 4100 420 6100
1.1/2 -24 350 5100 350 5100 280 4100 280 4100
2 -32 350 5100 350 5100 215 3100 215 3100
2.1/2 -40 215 3100 215 3100

JIS (Komatsu)

JIS
(Komatsu)

Metric Female
SwIvel 60°
Concave Seat

Thread
Size

Dash
Size
Max. Working
Pressure
mm bar psi
M14 x 1,5 -14 420 6100
M16 x 1,5 -16 420 6100
M18 x 1,5 -18 420 6100
M22 x 1,5 -22 380 5500
M24 x 1,5 -24 350 5100
M27 x 2,0 -27 280 4100
M30 x 1,5 -30 280 4100
M33 x 1,5 -33 215 3100
M33 x 2,0 -33 215 3100
M36 x 1,5 -36 170 2500
M42 x 1,5 -42 170 2500
M50 x 2,0 -50 100 1500
M60 x 2,0 -60 70 1000

JIC

JIC

JIC Male JIC Female
Swivel (Crimp Nut)
JIC Female
Swivel (Wire Nut)
JIC Female
Swivel High Pressure
(“V” Series”)
jic-male_1301 jicorsae-fs_01301 jic-fswire_1301 jic-f-swivel
Tube
Size
Thread
Size
Dash
Size
Max. Working Pressure
inch inch bar psi bar psi bar psi bar psi
3/16 3/8 -06 690 10000 690 10000
1/4

7/16

-07 690 10000
5/16

1/2

-08 620 9000
3/8

9/16

-09 550 8000
1/2

3/4

-12 690 10000 690 10000

5/8

7/8

-14 550 8000 550 8000 590 8500
3/4 1.1/16 -17 480 7000 480 7000 550 8000
7/8 1.3/16 -19 420 6100 380 5500 420 6100
1 1.5/16 -21 420 6100 320 4600 240 3500 350 5100
1.1/4 1.5/8 -26 350 5100 215 3100 240 3500 350 5100
1.1/2 1.7/8 -30 215 3100 215 3100 350 5100
2 2.1/2 -40 150 2100 110 1600
2.1/2 3 -48

JIS

JIS

BSPP Male
60° Convex
Seat

BSPP Female
60° Concave
Seat
bspp-malecon_1301 jicorsae-fs_01301

Thread
Size

Dash
Size
Max. Working
Pressure
inch bar psi bar psi
1/4 -04 480 7000 480 7000
3/8 -06 450 6500 450 6500
1/2 -08 350 5100 350 5100
5/8 -10
3/4 -12
1 -16

METRIC

DKOL (Light Series) Male & Female O Ring

dkol-male-female

Tube
Size
Thread
Size
Dash
Size
Max. Working Pressure
mm mm bar psi

6

M12 x 1,5 -12 430 6300
8 M14 x 1,5 -14 430 6300
10 M16 x 1,5 -16 430 6300
12 M18 x 1,5 -18 350 5100
15 M22 x 1,5 -22 350 5100
18 M26 x 1,5 -26 350 5100
22 M30 x 2,0 -30 280 4100
28 M36 x 2,0 -36 215 3100
35 M45 x 2,0 -45 180 2600
42 M52 x 2,0 -52 180 2600

METRIC

DKOS (Heavy Series) Male & Female O Ring

dkol-male-female

Tube
Size
Thread
Size
Dash
Size
Max. Working Pressure
mm mm bar psi

6

M14 x 1,5 -12 690 10000
8 M16 x 1,5 -14 690 10000
10 M18 x 1,5 -16 690 10000
12 M20 x 1,5 -20 620 9000
14 M22 x 1,5 -22 620 9000
16 M24 x 2,0 -24 420 6100
20 M30 x 2,0 -30 420 6100
25 M36 x 2,0 -36 420 6100
30 M42 x 2,0 -45 420 6100
38 M52 x 2,0 -52 420 6100

METRIC

Bonded Seal

metbondedseal_1308

Thread
Size
Dash
Size
Max. Working Pressure
mm bar psi
M10 -10 350 5100
M12 -12 350 5100
M14 -14 350 5100
M16 -16 350 5100
M18 -18 350 5100
M20 -20 280 4100
M22 -22 280 4100
M24 -24 250 3625
M26 -26 250 3625
M27 -27 280 4100
M30 -30 215 3100
M33 -33 215 3100
M36 -36 215 3100
M42 -42 215 3100
M48 -48 215 3100

ORFS

O Ring Face Seal

orfs-m_1301

Tube
Size
Thread
Size
Dash
Size
Max. Working
Pressure
inch inch bar psi

1/4

9/16

-09

690

10000

3/8

11/16

-11

690

10000

1/2

13/16

-13

630

9150

5/8

1

-16 630

9150

3/4

1.3/16

-19 480

7000

1

1.7/16*

-23 420

6100

1.1/4

1.11/16*

-27 280 4100

1.1/2

2*

-32 280 4100
*Wire Nut used

SAE

SAE SAE
45° Flare
SAE
Inverted Flare

sae-male_1301 sae-inverted_1301
Tube
Size

Thread
Size

Dash
Size
Max. Working
Pressure

inch

inch

bar

psi

bar psi

1/4

7/16

-07

690

10000

215 3100

5/16

1

-08 690

10000

215 3100

3/8

5/8

-10 590

8500

180 2600

7/16

11/16

-11

180 2600

1/2

3/4

-12 550 8000

5/8

7/8

-14 520 7500
3/4 1.1/16 -17 420 6100
1 1.5/16 -21
1.1/4 1.5/8 -26
1.1/2 1.7/8 -30
2 2.1/2 -40

SAE Flange

SAE Flange CODE 62 SAE
Flange
CODE 62 SAE
Flange
RYCO CODE
62C Special Flange
sae-c61c62_1301 sae-c61c62_1301 sae-c62c_1301
NOM.
Flange
Size

Dash
Size

Max. Working
Pressure

inch

bar

psi

bar psi bar psi

1/2

-08 350 5100 420 6100 420 6100

5/8

-10 350 5100 420 6100 420 6100

3/4

-12 350 5100 420 6100 420 6100
1 -16 350 5100 420 6100 420 6100
1.1/4 -20 280 4100 420 6100 420 6100
1.1/2 -24 215 3100 420 6100 420 6100
2 -32 215 3100 420 6100 420 6100
2.1/2 -40 215 3100

3

-48 140 2050

CROCBITE

CROCBITE CROCBITE
(HIGH PRESSURE)
CROCBITE
(HIGH FLOW)
crocbite-thread_wp crocbite_female
NOMINAL SIZE MAX. WORKING
PRESSURE
DN inch Dash bar psi bar psi
10 3/8 -10 450 6525
12 1/2 -12 450 6525
19 3/4 -20 420 6100
25 1 -25 420 6100
31 1.1/4 -32 420 6100
38 1/1.12 -40 420 6100
51  2  -50  420 6100 350 5100
 63  2.1/2  -63  350 5100 280 4100
 76  3  -75 215 3100

 

RYCO RKV

RYCO RKV RKVP
(HIGH PRESSURE)
RKVF
(HIGH FLOW)
rkv-thread_wp rkv_female
NOM.
Flange
Size

Max. Working
Pressure

DN

inch

Dash

bar

psi bar psi

10

3/8 -10 450 6525

12

1/2 -12 450 6525

19

3/4 -20 420 6100
25 1 -25 420 6100
31 1.1/4 -32 420 6100
38 1/1.12 -40 420 6100
51 2 -50 420 6100 170 2400
63 2.1/2 -63 350 5100 70 1000

76

3 -75 70 1000

STAPLELOK SUPERLOK SUPER-D

STAPLELOK
SUPERLOK
SUPER-D
STAPLELOK
MALE & FEMALE
SUPERLOK
MALE & FEMALE
RYCO SUPER-D
MALE & FEMALE
rlorrsl-male_1301 rlorrsl-fs_1301 rlorrsl-ff_1301
NOMINAL SIZE MAX. WORKING
PRESSURE
DN inch Dash bar psi bar psi bar psi
6 1/4 -06 420 6100
10 3/8 -10 420 6100
12 1/2 -12 415 6020
16 5/8 -16
19 3/4 -20 350 5100 420 6100 420 6100
25 1 -25 280 4100 380 5500 420 6100
31 1.1/4 -32 215 3100 350 5100 420 6100
38 1.1/2 -40 215 3100 350 5100 420 6100
51 2 -50 170 2500 350 5100 420 6100
63 2.1/2 -63 350 5100
WARNING: Staples must only be used ONCE, they MUST NOT BE RE-USED.
This applies to all STAPLELOK, SUPERLOK and RYCO SUPER-D Staples. Failure to
observe this warning may result in serious personal injury, or property damage.

 

RYCO WEO

t248_ca_thread_wp

TUBE SIZE DASH SIZE Max. Working
Pressure

inch

bar

psi
1/4 -04 350 5100
3/8 -06 350 5100
1/2 -08 350 5100
5/8 -10 350 5100
3/4 -12 350 5100
1 -16 250 3625

TUBE BITE

tube-bite_1301

TUBE SIZE DASH SIZE Max. Working
Pressure

inch

bar

psi
1/4 -04 260 3750
5/16 -05 260 3750
3/8 -06 260 3750
1/2 -08 220 3200
5/8 -10 220 3200
3/4 -12 220 3200
1 -16 170 2500
1.1/4 -20 140 2000
1.1/2 -24
2 -32
NOTE: Also consider the Maximum
Working Pressure of the tubing to be
used with TUBE BITE connections.

 

UN O RING
(O RING BOSS)

UN O RING
(O RING BOSS)
STAPLELOK
MALE & FEMALE
SUPERLOK
MALE & FEMALE
RYCO SUPER-D
MALE & FEMALE
uno-boss-m_1301 uno-boss-adj-m_1301 uno-boss-malels_1301
TUBE SIZE THREAD SIZE DASH SIZE MAX. WORKING
PRESSURE
inch inch bar psi bar psi bar psi
1/4 7/16 -07 480 7000 420 6100
5/16 1/2 -08 480 7000 420 6100
3/8 9/16 -09 480 7000 350 5100 350 5100
1/2 3/4 -12 480 7000 350 5100 350 5100
5/8 7/8 -14 480 7000 280 4100 280 4100
3/4 1.1/16 -17 480 7000 280 4100 280 4100
7/8 1.3/16 -19 480 7000 280 4100
1 1.5/16 -21 350 5100 280 4100
1.1/4 1.5/8 -26 215 3100 170 2500
1.1/2 1.7/8 -30 215 3100
2 2.1/2 -38