How to Use This Section

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How to Use this Section

This section is intended as an aid to identifying the most popular threads on hydraulic hose

couplings and adaptors, and hydraulic equipment.BSP, Metric, American and Japanese thread sizes can be ery similar. !t is important to measure

and match eery

criteria of thread diameter, thread pitch, seating or sealing type "including angle of seats if present# to accurately

determine thread type.

Procedure

Step 1. Investigation

$hec% for any mar%ings on fitting or equipment &hich may be a clue to thread type. $ountry of

origin may proide a clue.

Europe $hec% '!()BSP UK/Australia $hec% BSP

America $hec% (PT)J!$)*(+)+-S Japan $hec% J!S

All $+ parts hae a unique part number stamped on to aid identification.

Step . !isual Inspection

'epending on &hether the male or female thread or both are aailable, different features &ill aid

identification.

/ Are threads parallel or tapered0/ !s there an + ing or a &asher seal0

/ !f cone seats are present are they concae or cone10

/ Type and position on fittings.

Step ". #easure $hreads

2ith a calliper, measure the thread diameter. +' of male threads

!' of female threads


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*sing a thread gauge, determine the number of threads per inch.

!f thread gauge is not aailable, measure pitch from crest to crest of ad3acent threads, or count

the number of threads in 4)56 and multiply by four for threads per inch.$hart at bottom of page may assist.

Step %. Seat Angle #easurement

*sing a seat gauge, determine the angle of the seat.

Some fittings hae dual seats "eg. J!$ 789 : SA; 5


3/32

TP!

"Threads Per !nch#

=> =8 =5 =? 4@ 4> 4 45 4= 44.< 44 > 4.@ 4=.8

T;A' P!T$

"mm#?,@4 ?,@5 4,? 4,=8 4,75 4,5 4,4 =,4= =,=4 =,74 7,4> 4,< =,?

,SP$ - ,SPP threads

,SP is ,)I$ISH S$A(A)( PIPE

,SP$ is ,)I$ISH S$A(A)( PIPE$APE)

,SPP is ,)I$ISH S$A(A)( PIPEPA)AE

Also 0nown as hitworth &&2

$hread 3orm$hread 4orm per AS 15.16 ,S

16 IS+ 5$hread 4orm per AS 15.6 IS+7


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BSPT male threads seal against

threads of fi1ed BSPT female.

$ontact is made on the flan%s ofthe threads.

*se of a thread sealant isrecommended for BSPT male to

BSPT female connections.Measure the BSPT male thread

+' and female thread !' at the

first full thread near the end of thefitting.

BSPT male and BSPP male &ithconical 7?9 seat "?9 included

angle# seal against matching

conical 7?9 seatof BSPP female s&iel.

BSPP + ing male connector hasstraight threads and + ing &ith

metal etaining ing. !t seals

against flat e1ternal surfaceof BSPP female port.

BSPP male, &ith chamfer to

locate Bonded Seal also sealsagainst flat e1ternal surface of

BSPP female port.

Surface irregularities require a

Spot -ace to ensure effectiesealing. ;lbo&s and tees hae

Coc% (ut to allo& orientation of

fitting to required direction.


5/32

BSPP male and BSPP female flat

face s&iel require a suitable soft

&asher bet&een faces to seal.-or lo& &or%ing pressure.

,SP$ - ,SPP $hreads (imensions

,SP$ - ,SPP

SI8E - PI$'H

(ASH

SI8E

,SP$ #AE

$H)EA( +(

,SPP #AE

$H)EA( +(

,SP$ 3E#AE

$H)EA( I(

,SPP 3E#AE

$H)EA( I(

inch 9 $PI mm inch mm inch mm inch mm inch4)> D => D?= @,< ?.78 @, ?.7> >,5 ?.77 >, ?.75

4)5 D 4@ D?5 4=,> ?.


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#E$)I' (I $hreads

(I is (EU$S'HE I(UStrIE+)#E

:*E)#A I(UStrIA

S$A(A)(;

$hread 3orm per (I "7&"6 IS+


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The same male used &ith a metal

Bonded Seal &ill mate &ith a '!(

7>


8/32

(K# 2 '+E SEA$

The '!( male ?9 internal cone seat

&ill mate &ith 'FC)'FM femaleuniersal =59)?9 cone fittings up to

and including size M= and 'FM

female ?9 cone fittings from sizeM7? up.

#AE$H)EA(

+( -PI$'H

3E#AE

$H)EA(I(

I*H$ SE)IES 9 (K/(K+ HEA!? SE)IES 9 (KS/(K+S

(ASHSI8E $U,E+( (1(IA ((IA (ASHSI8E $U,E+( (1(IA ((IA

mm mm mm mm mm mm mm mm

M4= 1 4,< 4?,< D4=4,= D454< 8,< ,7

M4 1 4,< 45,< D44 @,< 8,@

M4> 1 4,< 4,< D4>44< 4? 4=,? 4?,?

M=? 1 4,< 4>,< D=?4< 4= 45,? 4=,?

M== 1 4,< =?,< D==4,=

M7? 1 =,? =>,? D7?=? == =5,< ==,= D7?=? =? ==,< 4@,>

M7 1 =,? 75,? D7=? => 7?,< =>,= D7=? =< =8,< =5,<

M5= 1 =,? 5?,? D5==? 7? 77,? 7?,?

M5< 1 =,? 57,? D5,? 7


9/32

P$ - PS $hreadsP$ is A$I+A PIPE $APE):A#E)I'A;

PS is A$I+A PIPE S$)AI*H$

:PA)AE;

P$3 is A$I+A PIPE $APE) 3+)3UE

PS# is A$I+A PIPE S$)AI*H$

#E'HAI'A

$hread 4orm perASI/AS#E ,1.>.1

$hread 4orm per

ASI/AS#E ,1.>.1$hread 4orm per SAE J%5<

$hread 4orm per

ASI/AS#E ,1.>.1

(ational Pipe threads are similar in function to BSP threads, but are not generally

interchangeable.

(PT- threads "also %no&n as 'ryseal# are an improement to (PT.$ontrolled truncation of threads mean the metalDtoDmetal thread seal is at root and crest of


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threads, in addition to flan%s of threads.

*se of thread sealant is recommended for (PT male and (PT female connection.

Measure (PT male thread +' and (PT female thread !' at first full thread near end of fitting.

P$ $hreads (imensions

P$

$H)EA(SI8E -

PI$'H

(ASHSI8E

#AE

$H)EA(#I+)

+(

3E#AE

$H)EA(I(

inch D TP! mm inch mm inch

4)> D =8 D?= @,@ ?.7@ >,5 ?.77

4)5 D 4> D?5 47,= ?. D 4> D? 4, ?.< 45,8 ?.

4)= D 45 D?> =?, ?.>4 48,> ?.8?

7)5 D 45 D4= =,? 4.?= =7,5 ?.@=

4 D 44.4)= D4 7=,< 4.=> =@,< 4.4

4.4)5 D44.4)=

D=? 54,= 4.= 7>,4 4.


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=.4)= D > D5? 84,< =.>= @,4 =.8=

7 D > D5> >8,7 7.55 >5,> 7.75

Thread size refers to the nominal bore of the pipe.

Subtract appro1imately 4)5I" mm# from thread meas ure ment for nominal pipe size.

Pitch is Threads Per !nch "TP!#.

+)3S $hreads

SAE J1%&"6 IS+ 7%"%9"

+)3S is + )I* 3A'E

SEA

+-S system consists of +-S

Male &ith + ing in -ace, &hich

seals against -lat Seated +-S-emale S&iel (ut fitting.

The S&iel (ut can be slipped bac%

to help installation in tight

situations.

The prominent position of the +


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ing on the Male fitting ma%es iteasy to inspect the condition of the

+ ing.

#AE $H)EA(

+( - PI$'H

(ASH

SI8E

#AE

$H)EA( +(

3E#AE

$H)EA( I(

$U,E

SI8E

inch 9 $PI mm inch mm inch inch

@)4 D 4> *(- D?@ 45,7 ?.

47)4 D 4 *( D47 =?, ?.>4 4@,4 ?.8< 4)=

4 D 45 *(S D4 = =>,= 4.44 7)5

4.8)4 D 4= *( D=7 7,7 4.57 75,7 4.7< 4

4.44)4 D 4= *( D=8 5=,8 4.> 5?, 4.? 4.4)5

= D 4= *( D7= =.?? 5>,> 4.@= 4.4)=

JI' "52 3A)E - U+ :+ )I* ,+SS;

$hreads

JI' is J+I$ I(US$)IES '+U'I

U is UI3IE( A$I+A

SAE J&1%6 IS+ 7%"%9

SAE J1@


13/32

J!$ male has 789 flare &hich sealsagainst 789 seat in female.

J!$ male can also seal against 789

flared tubing &ith J!$ nut and sleee.

J!$ male can also be used &ith

$+ S475 JDCo% -emale (ut and

-lareless +lie on !mperial +'tubing.

*(+ "+ ing Boss# seals &ith+ing compressed bet&een he1 boss

of *( male and 4=9)4


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@)4 D 4> *(- D?@ 45,7 ?. D 45 *(- D45 ==,= ?.>> =?,7 ?.>?

4.4)4 D 4= *( D48 =8,? 4.? =5,@ ?.@> 7)5

4.7)4 D 4= *( D4@ 7?,= 4.4@ =>,= 4.44 8)>

4.> 5


15/32

The $+C+F male connector uses an

+ ing and bac%up &asher, and seals on

the smooth bore of the female. Theconnection is held together by the staple.

The male staple grooe "E# aligns &iththe drilled holes of the female allo&ing

the staple to be inserted. $+C+F and

$+ S*P;C+F use different &idthstaples and are therefore (+T

interchangeable.

+#IASI8E

+#. #AE

+(- 3E#AE

I(

)?'++K S$APE

SI8E

)?'+ SUPE)+K S$APE

SI8E

* * S S * * S S

( inch (ash mm inch mm inch mm inch mm inch mm inch

4)5 D? 4< ?. D4? =? ?.8@


16/32

IS $hreads

JIS is JAPAESE I(US$)IA S$A(A)(S

$here are 4our popular coupling st=les in Japan.


17/32

1. JIS $apered Pipe $hread

The Japanese tapered pipe thread connector

is identical to and interchangeable &ith theBSPT "tapered# connector. The Japanesemale thread does not hae a 7?9 -lare, and

&ill not mate &ith the BSPP female s&iel

&ith conical seat.

The seal on the Japanese tapered pipe threadconnector is made on the threads. *se of a

thread sealant is recommended.

$hread 4orm per JIS , >>" :identical to

,SP$;

efer to BSPT section for dimensions ofthreads.

. JIS ">2 3lare :3emaleInternal 'one Seat;

This connection uses a ?9 concae

"inerted# seat and British Standard Pipe

Parallel threads. They are notinterchangeable &ith BSPP conical seat

couplings, because the cone seats are

opposite.

$hread 4orm per JIS , >> :identical to,SPP;

". Komatsu ">2 4lare

:3emale Internal 'one Seat;

Threads commonly used on Fomatsuequipment "7?9 cone# hae metric threadform.

#AE $H)EA(

+( - PI$'H

(ASH

SI8E

3E#AE

$H)EA( I(

mm mm

M45 1 4,< D454< 4=,<

M4> 1 4,< D4>4< 4,<

M== 1 4,< D==4< =?,<M=5 1 4,< D=54< ==,<

M7? 1 4,< D7?4< =>,<

M77 1 4,< D774< 74,<

M7 1 4,< D74< 75,<

M77 1 4,< D774< 74,<

%. Komatsu St=le 3lange

3itting JIS , 7"


18/32

efer to BSPT section for dimensions of

threads.

Standards.

,SP$ - ,SPP $heads (imensions

,SP$ - ,SPPSI8E - PI$'H

(ASHSI8E

,SP$ #AE$H)EA( +(

,SPP #AE$H)EA( +(

,SP$ 3E#AE$H)EA( I(

,SPP 3E#AE$H)EA( I(

inch 9 $PI mm inch mm inch mm inch mm inch

4)> D => D?= @,< ?.78 @, ?.7> >,5 ?.77 >, ?.75

4)5 D 4@ D?5 4=,> ?.


19/32

SAE $hreads

SAE is Societ= o4 Automotive Engineers

These fittings are commonly used in refrigeration, automotie and lo& pressure applications.

SAE %&2 3lare 9 SAE J&1

SA; male has 5


20/32

SAE %& I!E)$E( 3A)E 9 SAE J&1

#AE$H)EA

(+( -

PI$'H

(AS

HSI8E

#AE

$H)EA( +(

3E#A

E$H)EA

( I(

$U,E

SI8E

inch 9$PI

mminch

mminch

inch

8)4 D =5 D?8 44,4?.5

5@,@

?.7

@4)5

4)= D =? D?> 4=,8?.<

?

44,5?.5

<

D4? 4

44)4 D

4>D44 48,<

?.

@4,?

?.

78)4

SAE PI+$ + )I* SEAS

Pilot #ale Swivel

#AE

$H)EA

(+( -

PI$'H

(AS

HSI8E

#AE

$H)EA( +(

3E#A

E

$H)EA( I(

$U,

E

SI8E

inch 9

$PI

mminc

h

mminc

h

(ash

D 4> D4? 4 D4= 4@,??.8

<48,>

?.8

?D>

8)> D 4> D45 ==,=?.>>

=?,?.>4

D4?


21/32

Pilot 3emale Swivel

#AE$H)EA

(+( -

PI$'H

(AS

HSI8E

#AE

$H)EA( +(

3E#A

E$H)EA

( I(

$U,E

SI8E

inch 9$PI

mminch

mminch

(ash

D 4> D4? 4

7)5 D 4 D4= 4@,??.8

<48,<

?.

@D>

Top

#E$)I' 4rench *aB

http://www.ryco.com.au/index.php?id=225#tophttp://www.ryco.com.au/index.php?id=225#top


22/32

Also 0nown as #etric 3rench*A8 %2

These seal on a =59 cone seat

located internally on the maleconnector using straight fine metricthreads.

Metric -rench EAK series usesfractional number metric +'

tubing, as sho&n in the table.

Metric -rench Millimetric series

uses &hole number metric +'

tubing. The t&o series are not

interconnectable.

The male &ill mate &ith a straightthread female s&iel &ith spherical

nose seat.

The same male also mates &ith

flareless tube, Tube (ut and

$ompression +lie "$utting ing#.Tightening of the female nut

compresses the olie causing it cutinto the tube, thereby forming a seal

bet&een the tube, olie and =59male cone.

#AE

$H)EA(+( -

PI$'H

(ASHSI8E

#AE$H)EA(

+(

3E#AE$H)EA(

I(

$U,ESI8E

inch 9 $PI mm inch mm inch mm

M=? 1 4,< D=? =?,? ?.8> 4>,< ?.8= 47,=<

M=5 1 4,< D=5 =5,? ?.@5 ==,< ?.>> 4,8<

M7? 1 4,< D7? 7?,? 4.4> =>,< 4.4= =4,=<

M7 1 4,< D7 7,? 4.54 75,< 4.7< =,8<

M5< 1 4,< D5< 5


23/32

SAE + )I* 3A*E 9 '+(E


24/32

7)5 D4= 7>,44.<

?,87

?.=

<

==,

=

?.>

>58,

4.>

>

7)> D

44.4)5

M4? 1

4,<7<

4 D4 55,<4.8

<>,??

?.74

<

=,

=

4.?

7 D

44.4)5

M4? 1

4,<7<

4.4)5 D=?


25/32

4 D4 58,4.>

>

45,=

?

?.

4.?

@


26/32

#E$)I' 3rench #illimetric

Also 0nown as #etric #illimetric

These seal on a =59 cone seat

located internally on the maleconnector using straight fine metric

threads.

Metric -rench EAK series usesfractional number metric +'

tubing, as sho&n in the table.

Metric -rench Millimetric series

uses &hole number metric +'tubing. The t&o series are notinterconnectable.

The male &ill mate &ith a straightthread female s&iel &ith spherical

nose seat.

The same male also mates &ithflareless tube, Tube (ut and

$ompression +lie "$utting ing#.

Tightening of the female nutcompresses the olie causing it cut

into the tube, thereby forming a seal

bet&een the tube, olie and =59male cone.

#AE

$H)EA(

+( -

PI$'H

(ASH

SI8E

#AE

$H)EA(

+(

3E#AE

$H)EA(

I(

$U,E

SI8E

inch 9 $PI mm inch mm inch mm

M=8 1 4,< D=8 =8,? 4.? = =>,< 4.4= ==

M77 1 4,< D77 77,? 4.7? 74,< 4.=5 =<

M7 1 4,< D7 7,? 4.54 75,< 4.7< =>

M7@ 1 4,< D7@ 7@,? 4. 7?

M5< 1 4,< D5< 5


27/32

SAE + )I* 3A*E ,+'KS 9 '+(E


28/32

'+(E ? ? =.7=7,

>?.@5


29/32

4.4)= D=5 D 44 1 = M41=,?


30/32

The elocity of the fluid should not e1ceed the range sho&n in the right hand column.

2hen oil elocities are higher than recommended in the chart, turbulent flo& occurs, resulting in

loss of pressure and e1cessie heating.

-or long hoses and)or high iscosity oil, or if the flo& of hydraulic fluid is continuous, it is

recommended to use figures at the lo&er end of the Ma1imum ecommended elocity range.


31/32

-or short hoses and)or lo& iscosity oil, or if the flo& of hydraulic fluid is intermittent or for

only short periods of time, figures at the higher end of the Ma1imum ecommended elocity

range can be used.

A f!rther e#ample will help yo! to !se this chart"

'etermine the hose size required to carry 5? litres of oil per minute and determine the elocity of

the oil through the hose assembly. The assembly is to be used as a pressure line and the flo& &ill

be continuous.

Cocate the flo&, 5? litres per minute "left hand column#, and elocity, 4< feet per second "right

hand column#, since 4< is the centre of the Pressure Cines Ma1imum recommended elocity

range.

Cay a straight edge across these t&o points. The straight edge crosses the centre column 3ust

aboe the D?> on 6All +ther 'ash Sizes6 side of ose Bore a1is.

Feeping the straight edge on 5? litres per minute, cross the centre column at D?> and D4? sizes

and read the -lo& elocity in the right hand column.

!t can be seen that using D?> ose Size , -lo& elocity &ill be 4> feet per second, and for D4?

ose Size, -lo& elocity &ill be 44 feet per second. As the flo& is continuous, D4? ose Size is

recommended.


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