Single Shut-Off
Nominal Diameter
5 = 20 mm²
RECTUS Series
21KA
Chart
Technical Description
Mini industrial coupling, the world‘s most commonly used
profile. Above average flow performance for liquid and gaseous media. Large band width in materials and valve variants.

Advantages
Single handed operation. Small dimensions. All versions interchangeable.

Interchangeability
RECTUS 90
CAMOZZI
EWO
KANI
Working Pressure
PB = 35 bar, maximum static
working pressure with safety
factor of 4 to 1.

Working Temperature*
-20°C up to +100°C (NBR)
-40°C up to +120/150°C (EPDM)
-15°C up to +200°C (FKM)
0°C up to +316°C (FFKM)
depending on the medium.

*At a temperature below
-20°C and above +100°C special
seals are available on request.
Material

Coupling		 Standard Nickel Plated
Back Body
Valve Body
Sleeve
Valve
Spring and Locking Ring
Locking Balls
Seals		 Brass
Brass
Brass
Brass
AISI 301
AISI 420
NBR		 Brass, Nickel Plated
Brass, Nickel Plated
Brass, Nickel Plated
Brass
AISI 301
AISI 420
NBR
Plug
Plug Brass Brass, Nickel Plated

Couplings

  Connection A Hex SW L mm D mm L1 mm L2 mm Hex1 SW B mm G mm Version Part Number
Male Thread
Male Thread
 G 1/8 14 36 16 7 Standard 21KAAW10MPX
G 1/8 14 36 16 7 Nickel Plated 21KAAW10MPN
G 1/4 17 38 16 9 Standard 21KAAW13MPX
G 1/4 17 38 16 9 Nickel Plated 21KAAW13MPN
G 3/8 19 38 16 9 Standard 21KAAW17MPX
G 3/8 19 38 16 9 Nickel Plated 21KAAW17MPN
M 12 x 1,5 17 39 16 10 Standard 21KAAD12MPX
M 12 x 1,5 17 39 16 10 Nickel Plated 21KAAD12MPN
M 14 x 1,5 17 39 16 10 Standard 21KAAD14MPX
M 14 x 1,5 17 39 16 10 Nickel Plated 21KAAD14MPN
Female Thread
Female Thread
 G 1/8 14 36 16 9 Standard 21KAIW10MPX
G 1/8 14 36 16 9 Nickel Plated 21KAIW10MPN
G 1/4 17 38 16 9 Standard 21KAIW13MPX
G 1/4 17 38 16 9 Nickel Plated 21KAIW13MPN
G 3/8 19 38 16 9 Standard 21KAIW17MPX
G 3/8 19 38 16 9 Nickel Plated 21KAIW17MPN
M 12 x 1,5 17 38 16 6 Standard 21KAIM12MPX
M 12 x 1,5 17 38 16 6 Nickel Plated 21KAIM12MPN
M 14 x 1,5 17 38 16 6 Standard 21KAIM14MPX
M 14 x 1,5 17 38 16 6 Nickel Plated 21KAIM14MPN
Front Panel Installation, Hose Barb Panel Mount
Front Panel Installation, Hose Barb Panel Mount
 4 mm 22 46 24 17 16 24 5 M 20 x 1 Standard 21KATE04MPX
4 mm 22 46 24 17 16 24 5 M 20 x 1 Nickel Plated 21KATE04MPN
6 mm 22 46 24 17 16 24 5 M 20 x 1 Standard 21KATE06MPX
6 mm 22 46 24 17 16 24 5 M 20 x 1 Nickel Plated 21KATE06MPN
8 mm 22 46 24 17 16 24 5 M 20 x 1 Standard 21KATE08MPX
8 mm 22 46 24 17 16 24 5 M 20 x 1 Nickel Plated 21KATE08MPN
9 mm 22 46 24 17 16 24 5 M 20 x 1 Standard 21KATE09MPX
9 mm 22 46 24 17 16 24 5 M 20 x 1 Nickel Plated 21KATE09MPN
10 mm 22 46 24 17 16 24 5 M 20 x 1 Standard 21KATE10MPX
10 mm 22 46 24 17 16 24 5 M 20 x 1 Nickel Plated 21KATE10MPN
Plastic Hose Connection with Spring Guard
Plastic Hose Connection with Spring Guard
 4 x 6 mm 14 125 16 7 6 M 10 x 1 Standard 21KAKK06MPX
4 x 6 mm 14 125 16 7 6 M 10 x 1 Nickel Plated 21KAKK06MPN
6 x 8 mm 14 130 16 7 6 M 12 x 1 Standard 21KAKK08MPX
6 x 8 mm 14 130 16 7 6 M 12 x 1 Nickel Plated 21KAKK08MPN
Plastic Hose Connection
Plastic Hose Connection
 4 x 6 mm 14 42 16 7 6 M 10 x 1 Standard 21KAKO06MPX
4 x 6 mm 14 42 16 7 6 M 10 x 1 Nickel Plated 21KAKO06MPN
6 x 8 mm 14 42 16 7 6 M 12 x 1 Standard 21KAKO08MPX
6 x 8 mm 14 42 16 7 6 M 12 x 1 Nickel Plated 21KAKO08MPN
Panel Mount, Plastic Hose Connection
Panel Mount, Plastic Hose Connection
 4 x 6 mm 14 54 16 7 18 12 3 M 10 x 1 Standard 21KAKS06MPX
4 x 6 mm 14 54 16 7 18 12 3 M 10 x 1 Nickel Plated 21KAKS06MPN
6 x 8 mm 17 54 16 7 18 17 4 M 12 x 1 Standard 21KAKS08MPX
6 x 8 mm 17 54 16 7 18 17 4 M 12 x 1 Nickel Plated 21KAKS08MPN
Push-In
Push-In
 6 mm 14 43,5 13,2 Nickel Plated 21KARP06MPN
8 mm 17 48 15,4 Nickel Plated 21KARP08MPN
                     
                     
Front Panel Installation, Plastic Hose Panel Mount
Front Panel Installation, Plastic Hose Panel Mount
 4 x 6 mm 22 42 24 7 16 24 5 M 20 x 1 Standard 21KAKE06MPX
4 x 6 mm 22 42 24 7 16 24 5 M 20 x 1 Nickel Plated 21KAKE06MPN
6 x 8 mm 22 42 24 7 16 24 5 M 20 x 1 Standard 21KAKE08MPX
6 x 8 mm 22 42 24 7 16 24 5 M 20 x 1 Nickel Plated 21KAKE08MPN
Hose Barb
Hose Barb
 4 mm 14 46 16 17 Standard 21KATF04MPX
4 mm 14 46 16 17 Nickel Plated 21KATF04MPN
6 mm 14 46 16 17 Standard 21KATF06MPX
6 mm 14 46 16 17 Nickel Plated 21KATF06MPN
8 mm 14 46 16 17 Standard 21KATF08MPX
8 mm 14 46 16 17 Nickel Plated 21KATF08MPN
9 mm 14 46 16 17 Standard 21KATF09MPX
9 mm 14 46 16 17 Nickel Plated 21KATF09MPN
10 mm 14 46 16 17 Standard 21KATF10MPX
10 mm 14 46 16 17 Nickel Plated 21KATF10MPN
6 mm Parker 14 50 16 20 Standard 21KATP06MPX
6 mm Parker 14 50 16 20 Nickel Plated 21KATP06MPN
Panel Mount, Hose Barb
Panel Mount, Hose Barb
 4 mm 12 60 16 17 14 12 4 M 10 x 1 Standard 21KATS04MPX
4 mm 12 60 16 17 14 12 4 M 10 x 1 Nickel Plated 21KATS04MPN
5 mm 17 60 16 17 14 17 4 M 12 x 1 Standard 21KATS05MPX
5 mm 17 60 16 17 14 17 4 M 12 x 1 Nickel Plated 21KATS05MPN
6 mm 17 60 16 17 14 17 4 M 12 x 1 Standard 21KATS06MPX
6 mm 17 60 16 17 14 17 4 M 12 x 1 Nickel Plated 21KATS06MPN
8 mm 17 60 16 17 14 17 4 M 12 x 1 Standard 21KATS08MPX
8 mm 17 60 16 17 14 17 4 M 12 x 1 Nickel Plated 21KATS08MPN
9 mm 17 60 16 17 14 19 4 M 14 x 1 Standard 21KATS09MPX
9 mm 17 60 16 17 14 19 4 M 14 x 1 Nickel Plated 21KATS09MPN
10 mm 17 60 16 17 14 19 4 M 14 x 1 Standard 21KATS10MPX
10 mm 17 60 16 17 14 19 4 M 14 x 1 Nickel Plated 21KATS10MPN

Plugs

  Connection A Hex SW L mm D mm L1 mm L2 mm Hex1 SW B mm G mm Version Part Number
Plastic Hose Connection with Spring Guard
Plastic Hose Connection with Spring Guard
 4 x 6 mm 115 6 6 M 10 x 1 Standard 21SFKK06MXX
4 x 6 mm 115 6 6 M 10 x 1 Nickel Plated 21SFKK06MXN
6 x 8 mm 120 6 6 M 12 x 1 Standard 21SFKK08MXX
6 x 8 mm 120 6 6 M 12 x 1 Nickel Plated 21SFKK08MXN
Plastic Hose Connection
Plastic Hose Connection
 4 x 6 mm 32 10 6 6 M 10 x 1 Standard 21SFKO06MXX
4 x 6 mm 32 10 6 6 M 10 x 1 Nickel Plated 21SFKO06MXN
6 x 8 mm 32 12 6 6 M 12 x 1 Standard 21SFKO08MXX
6 x 8 mm 32 12 6 6 M 12 x 1 Nickel Plated 21SFKO08MXN
8 x 10 mm 17 36 9 8 M 16 x 1 Standard 21SFKO10MXX
8 x 10 mm 17 36 9 8 M 16 x 1 Nickel Plated 21SFKO10MXN
8 x 12 mm 17 36 9 8 M 16 x 1 Standard 21SFKO12MXXS
8 x 12 mm 17 36 9 8 M 16 x 1 Nickel Plated 21SFKO12MXNS
Panel Mount, Plastic Hose Connection
Panel Mount, Plastic Hose Connection
 4 x 6 mm 14 43 7 18 12 3 M 10 x 1 Standard 21SFKS06MXX
4 x 6 mm 14 43 7 18 12 3 M 10 x 1 Nickel Plated 21SFKS06MXN
6 x 8 mm 14 44 7 18 17 4 M 12 x 1 Standard 21SFKS08MXX
6 x 8 mm 14 44 7 18 17 4 M 12 x 1 Nickel Plated 21SFKS08MXN
Push-In
Push-In
 6 mm 17 30,5 13,2 Nickel Plated 21SFRP06MPN
8 mm 17 37 15,4 Nickel Plated 21SFRP08MPN
                     
                     
Hose Barb
Hose Barb
 4 mm 32 9 17 Standard 21SFTF04MXX
4 mm 32 9 17 Nickel Plated 21SFTF04MXN
5 mm 32 9 17 Standard 21SFTF05MXX
5 mm 32 9 17 Nickel Plated 21SFTF05MXN
6 mm 32 9 17 Standard 21SFTF06MXX
6 mm 32 9 17 Nickel Plated 21SFTF06MXN
8 mm 32 9 17 Standard 21SFTF08MXX
8 mm 32 9 17 Nickel Plated 21SFTF08MXN
9 mm 33 10 17 Standard 21SFTF09MXX
9 mm 33 10 17 Nickel Plated 21SFTF09MXN
10 mm 33 12 17 Standard 21SFTF10MXX
10 mm 33 12 17 Nickel Plated 21SFTF10MXN
6 mm Parker 36 16 20 Standard 21SFTP06MXX
6 mm Parker 36 16 20 Nickel Plated 21SFTP06MXN
Panel Mount, Hose Barb
Panel Mount, Hose Barb
 4 mm 14 50 17 14 14 4 M 10 x 1 Standard 21SFTS04MXX
4 mm 14 50 17 14 14 4 M 10 x 1 Nickel Plated 21SFTS04MXN
5 mm 14 50 17 14 17 4 M 12 x 1 Standard 21SFTS05MXX
5 mm 14 50 17 14 17 4 M 12 x 1 Nickel Plated 21SFTS05MXN
6 mm 14 50 17 14 17 4 M 12 x 1 Standard 21SFTS06MXX
6 mm 14 50 17 14 17 4 M 12 x 1 Nickel Plated 21SFTS06MXN
8 mm 14 50 17 14 17 4 M 12 x 1 Standard 21SFTS08MXX
8 mm 14 50 17 14 17 4 M 12 x 1 Nickel Plated 21SFTS08MXN
9 mm 14 50 17 14 17 4 M 12 x 1 Standard 21SFTS09MXX
9 mm 14 50 17 14 17 4 M 12 x 1 Nickel Plated 21SFTS09MXN
10 mm 17 50 17 14 19 4 M 14 x 1 Standard 21SFTS10MXX
10 mm 17 50 17 14 19 4 M 14 x 1 Nickel Plated 21SFTS10MXN

Plugs

  Connection A Hex SW L mm D mm L1 mm L2 mm Hex1 SW B mm G mm Version Part Number
Male Thread
Male Thread
 G 1/8 14 25 7 Standard 21SFAW10MXX
G 1/8 14 25 7 Nickel Plated 21SFAW10MXN
G 1/4 17 28 9 Standard 21SFAW13MXX
G 1/4 17 28 9 Nickel Plated 21SFAW13MXN
G 3/8 17 28 9 Standard 21SFAW17MXX
G 3/8 17 28 9 Nickel Plated 21SFAW17MXN
M 10 x 1 14 26 8 Standard 21SFAD10MXX
M 10 x 1 14 26 8 Nickel Plated 21SFAD10MXN
M 12 x 1,5 17 28 10 Standard 21SFAD12MXX
M 12 x 1,5 17 28 10 Nickel Plated 21SFAD12MXN
M 14 x 1,5 17 28 10 Standard 21SFAD14MXX
M 14 x 1,5 17 28 10 Nickel Plated 21SFAD14MXN
Female Thread
Female Thread
 G 1/8 14 25 8 Standard 21SFIW10MXX
G 1/8 14 25 8 Nickel Plated 21SFIW10MXN
G 1/4 17 25 9 Standard 21SFIW13MXX
G 1/4 17 25 9 Nickel Plated 21SFIW13MXN
G 3/8 19 26 9 Standard 21SFIW17MXX
G 3/8 19 26 9 Nickel Plated 21SFIW17MXN
M 10 x 1 14 26 9 Standard 21SFIM10MXX
M 10 x 1 14 26 9 Nickel Plated 21SFIM10MXN
M 12 x 1,5 17 27 10 Standard 21SFIM12MXX
M 12 x 1,5 17 27 10 Nickel Plated 21SFIM12MXN
M 14 x 1,5 17 27 10 Standard 21SFIM14MXX
M 14 x 1,5 17 27 10 Nickel Plated 21SFIM14MXN