Description
The wide variety of flanges detailed here are available as standard on the majority of our products.
The wide variety of flanges detailed here are available as standard on the majority of our products. The flanges are based on the major international flange interface specifications and we also have many of the more obscure standards and customer specific flanges on record.
Standard flanges are available in Brass or Aluminium and other materials on request. Certain designs are available from stock to provide a minimum delivery lead-time.
We offer technical support at the design stage to ensure the most suitable flange is chosen for every application.
All flanges are manufactured to the highest quality standards
Download the flange guide specifications for more details.
Flange types
There are 3 flange types - the plain, the “O” ring and the choke.
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Plain flange - UBR
It has a flat face – it is also sometimes called a plain or a cover flange.
When mated to another plain or ‘O’ ring flange it gives the best match performance. It can be used with either an ‘O’ ring flange, a choke flange or another plain flange
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”O” ring flange PBR
It has a flat face with a groove cut in it to take an ‘O’ ring for environmental or pressure sealing. It is used together with a plain flange.
It is permissible, but not recommended, to use with another PBR flange and “O” ring.
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Choke flange - CBR
It has 2 grooves cut into it. The outer groove is for an ‘O’ ring (the same as the PBR flange). The inner groove is the choke and the region between the waveguide aperture and the inner groove is sub flush. The distance from the waveguide to the bottom of the choke groove is ¼ wavelength so the reflection presents a short circuit at the waveguide.
It must be used together with a plain flange, and is used in very high power systems.
It essential that the flange is aligned precisely to minimise the return loss degradation.
If the flange is correctly aligned and used at the frequency the choke is designed for (typically the band centre) then it offers the best leakage performance (but the worst match performance - it is possible to achieve similar leakage performance using rf shims without the degradation in match.)
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Flange Finder
To find a particular flange, start by viewing the waveguide sizes below. These are the more common flanges but we have a large library of flange standards on record.
WG6, R14, WR650, RG 69/U
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Flange No. |
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| RECTANGULAR PLAIN 10 HOLE |
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F06-012
F06-122
F06-542
F06-544 |
UDR 14
CPR 650F
UG 1714/U
UG 1720/U |
| RECTANGULAR SEAL GROOVE 10 HOLE |
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F06-031
F06-021
F06-652
F06-582
F06-654
F06-584 |
PDR 14
CPR 650G
UG 417B/U UG
1362/U
UG 418B/U
UG 1343/U |
WG8 R22 WR430 RG104/U
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Flange No. |
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| RECTANGULAR PLAIN 10 HOLE |
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F 08-012
F 08-122
F 08-542
F 08-544 |
UDR 22
CPR 430F
UG 1716/U
UG1711/U |
| RECTANGULAR SEAL GROOVE 10 HOLE |
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F08-031
F08-021
F08-652
F08-582
F08-654
F08-584 |
PDR 22
CPR 430G
UG435B/U
UG 1344/U
UG437B/U
UG1345/U |
WG9A R26 WR340 RG112/U
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Flange No. |
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| RECTANGULAR PLAIN 10 HOLE |
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F 9A-012
F 9A-122
F 9A-542
F 9A-544 |
UDR 26
CPR 340F
UG 1712/U
UG 1713/U |
| RECTANGULAR SEAL GROOVE 10 HOLE |
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F9A-031
F9A-021
F9A-652
F9A-582
F9A-654
F9A-584 |
PDR 26
CPR 340G
UG553A/U
UG 1346/U
UG554A/U
UG 1347/U |
WG10 R32 WR284 RG48/U
| Flanges for WG10, R32, WR284, RG 48/U189131 |
| Rectangular Flange Plain 10 hole |
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UDR 32 TWS F10-012 A=76.2mm B=114.3mm E=59.14mm F=29.36mm G=65.08mm H=97.22mm thickness=10mm hole dia: blue=green=6.65mm red= 6.93mm |
CPR 284F TWS F10-112 A=76.2mm B=114.3mm E=59.13mm F=29.36mm G=65.07mm H=97.23mm thickness=10mm hole dia: blue=red=6.59mm green= 6.54mm |
UG 1724/U TWS F10-542 A=76.2mm B=114.3mm E=59.14mm F=29.36mm G=65.08mm H=97.24mm thickness=9.65 hole dia: blue=red=6.62mm green= 6.54mm |
UG 1725/U TWS F10-544 A=76.2mm B=114.3mm E=59.14mm F=29.36mm G=65.08mm H=97.24mm thickness=9.65 hole dia: blue=red=6.60mm green= 6.54mm |
| Rectangular Flange + seal groove 10 hole |
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PDR 32 TWS F10-031 A=76.2mm B=114.3mm E=59.14mm F=29.36mm G=65.08mm H=97.22mm thickness=10mm hole dia: blue=green=6.93mm red= 6.65mm |
CPR 284G TWS F10-021 A=76.2mm B=114.3mm E=59.14mm F=29.36mm G=65.08mm H=97.22mm thickness=10mm hole dia: blue=red=6.55mm green= 6.60mm |
UG 1348/U TWS F10-582 A=76.2mm B=114.3mm E=59.14mm F=29.36mm G=65.08mm H=97.24mm thickness=9.65 hole dia: blue=red=6.60mm green= 6.54mm |
UG 1349/U TWS F10-584 A=76.2mm B=114.3mm E=59.14mm F=29.36mm G=65.08mm H=97.24mm thickness=9.65 hole dia: blue=red=6.60mm green= 6.54mm |
| Round Flange Plain 6 hole |
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5985-99-083-1560 TWS F10-052 A=149.22mm thickness=7.93mm hole dia=6.53mm on 136.53mm PCD |
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| Round Flange + seal groove + choke 6 hole |
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5985-99-083-1558 TWS F10-071 A=149.22mm thickness=7.93mm hole dia=6.53mm on 136.53mm PCD |
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| Round Flange Plain 8 hole |
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UAR 32 TWS F10-332 A=134.9mm thickness=7.90mm hole dia=6.52mm on 120.65mm PCD |
UG 53/U TWS F10-082 A=134.95mm thickness=6.35mm hole dia=6.58mm on 120.65mm PCD |
UG 584/U TWS F10-084 A=134.95mm thickness=6.35mm hole dia=6.58mm on 120.65mm PCD |
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| Round Flange + seal groove 8 hole |
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PAR 32 TWS F10-362 A=134.9mm thickness=7.92mm hole dia=6.52mm on 120.65mm PCD |
083-0010 TWS F10-042 A=134.94mm thickness=7.24mm hole dia=6.51mm on 120.65mm PCD |
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| Round Flange + seal groove + choke 8 hole |
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CAR 32 TWS F10-151 |
UG54B/U TWS F10-091 A=134.90mm thickness=7.90mm tapped holes dia= 1/4in-20 UNC-2B on 120.7mm PCD |
5985-99-83-0009 TWS F10-061 A=134.04mm thickness=7.94mm hole dia=6.52mm on 120.65mm PCD |
UG 585A-U TWS F10-093 A=134.95mm thickness=7.95mm tapped holes dia= 1/4in-20 UNC-2B on 120.65mm PCD |
WG11A R4O WR229
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Flange No. |
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| RECTANGULAR PLAIN 10 HOLE |
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F11A-012
F11A-122
F11A-542
F11A-544 |
UDR 40
CPR 229F
UG 1726/U
UG 1727/U |
| RECTANGULAR SEAL GROOVE 10 HOLE |
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F11A-031
F11A-021
F11A-582
F11A-584 |
PDR 40
CPR 229G
UG 1350/U
UG 1351/U |
RECTANGULAR
MINIATURE
8 HOLE |
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F11-202
F11-112 |
CMR 229
UER 40 |
WG12 R48 WR187 RG49/U
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Flange No. |
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RECTANGULAR PLAIN
8 HOLE |
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F12-122
F12-012
F12-572
F12-522
F12-574
F12-554 |
CPR 187F
UDR 48
UG 1475/U
UG 1728/U
UG 1480/U
UG 1729/U |
RECTANGULAR SEAL
GROOVE 8 HOLE |
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F12-031
F12-592
F12-594
F12-021 |
PDR 48
UG 1352/U UG
1353/U CPR 187G |
RECTANGULAR
MINIATURE 8 HOLE |
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F12-202
F12-112 |
CMR 178 UER 40 |
| ROUND PLAIN 8 HOLE |
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F12-342
F12-162
F12-164 |
UAR 48
UR 149A/U
UG 407/U |
ROUND SEAL
GROOVE 8 HOLE |
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F12-142
F12-042 |
PAR 48
083-0042 |
| ROUND CHOKE 8 HOLE |
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F12-381
F12-181
F12-071
F12-183 |
CAR 48
UG 148C/U
083-0041
UG406B/U |
WG13 R58 WR159
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Flange No. |
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RECTANGULAR PLAIN
8 HOLE |
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F13-122
F13-012
F13-552
F13-554 |
CPR 159F
UDR 58
UG 1730/U
UG 1731/U |
RECTANGULAR SEAL
GROOVE
8 HOLE |
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F13-021
F13-031
F13-592
F13-594 |
CPR 159G
PDR 58
UG 1354/U
UG 1355/U |
RECTANGULAR
MINIATURE 8 HOLE |
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F13-202
F13-112 |
CMR 159 UER 58 |
ROUND PLAIN
6 HOLE |
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F13-352 |
UAR 58 |
ROUND SEAL
GROOVE
6 HOLE |
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F13-372 |
PAR 58 |
ROUND CHOKE
6 HOLE |
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F13-391 |
CAR 58 |
WG14 R70 WR137 RG50/U
| Flanges for WG14, R70, WR137, RG 50/U |
| Rectangular Flange Plain 8 hole |
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CPR 137F TWS F14-122 A=49.34mm B=68.39mm E=36.53mm F=15.88mm G=22.23mm H=55.57mm thickness=9.9mm hole dia: blue=red=5.05mm |
UDR 70 TWS F14-012 A=49.45mm B=68.55mm E=36.52mm F=15.88mm G=22.22mm H=55.58mm thickness=10mm hole dia: red=5.39mm blue= 5.16mm |
UG 1476/U TWS F14-572 |
UG 1732/U TWS F14-552 A=49.41mm B=68.46mm E=36.53mm F=15.90mm G=22.24mm H=55.58mm thickness=6.35 hole dia: blue=red=5.03mm |
UG 1481/U TWS F14-574 (aluminium) |
UG 1733/U TWS F14-554 (aluminium) A=49.41mm B=68.46mm E=36.53mm F=15.90mm G=22.24mm H=55.58mm thickness=6.35 hole dia: blue=red=5.03mm |
| Rectangular Flange + seal groove 8 hole |
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CPR 137G TWS F14-021 A=49.45mm B=68.55mm E=36.52mm F=15.88mm G=22.22mm H=55.58mm thickness=10mm hole dia: red=5.39mm blue=5.16mm |
PDR70 TWS F14-031 A=49.45mm B=68.55mm E=36.52mm F=15.88mm G=22.22mm H=55.58mm thickness=10mm hole dia: red=5.39mm blue=5.16mm |
UG 1356/U TWS F14-592 A=44.58mm B=63.63mm E=32.51mm F=15.88mm G=19.05mm H=48.41mm thickness=6.35 hole dia: blue=red=4.32mm |
UG 1357/U TWS F14-594 (aluminium) A=49.40mm B=68.45mm E=36.53mm F=15.90mm G=22.25mm H=55.58mm thickness=6.35 hole dia: blue=red=5.03mm |
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| RECTANGULAR MINIATURE 8 HOLE |
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F14-202 F14-112 |
CMR 137 UER 70 |
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| Round Flange Plain 6 hole |
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F14-352 F14-082 F14-084 |
UAR 70 UG 344/U UG 441/U |
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| Round Flange + seal groove 6 hole |
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F14-372 F14-042 F14-044 |
PAR 70 083-0038 083-0132 |
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| Round Flange + seal groove + choke 6 hole |
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F14-391 F14-281 F14-283 F14-071 F14-073 |
CAR 70 UG343B/U UG440B/U 083-0037 083-0131 |
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WG15 R84 WR112 RG51/U
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Flange No. |
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| RECTANGULAR PLAIN 8 HOLE |
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F15-122
F15-012
F15-572
F15-552
F15-574
F15-554 |
CPR 112 F
UDR 84
UG 1477/U
UG 1734/U
UG 1482/U
UG 1735/U |
| RECTANGULAR SEAL GROOVE 8 HOLE |
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F15-021
F15-031
F15-592
F15-594 |
CPR 112G
PDR 84
UG 1358/U
UG 1359/U |
| RECTANGULAR MINIATURE 8 HOLE |
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F15-202
F15-112 |
CMR 112
UER 84 |
| Square Flange Plain |
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F15-402
F15-442
F15-444
F15-462
F15-682 |
UBR 84
UG 51/U
UG 138/U
54-005
54-001 |
| Square Flange + seal groove |
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F15-412
F15-432
F15-434 |
PBR 84
083-0034
011-9112 |
| Square Flange + seal groove + choke |
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F15-481
F15-421
F15-451
F15-521
F15-453
F15-523 |
59D-015
CBR 84
UG 52B/U
083-0033
UG 137B/U
083-0134 |
| ROUND SEAL GROOVE COUPLING |
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F15-222
F15-474 |
011-9660
012-0892 |
| ROUND CHOKE COUPLING |
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F15-231
F15-533 |
011-9661
012-0893 |
WG16 R100 WR90 RG52/U
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Flange No. |
| RECTANGULAR PLAIN 8 HOLE |
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F16-122
F16-012
F16-572
F16-574
F16-554
F16-552 |
CPR 90F
UDR 100
UG 1478/U
UF 1483/U
UG 1737/U
UG 1736/U |
| RECTANGULAR SEAL GROOVE 8 HOLE |
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F16-021
F16-031
F16-592
F16-594 |
CPR 90G
PDR 100
UG 1360/U
UG 1361/U |
| RECTANGULAR MINIATURE 8 HOLE |
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F16-202
F16-112 |
CMR 90
UER 100 |
| SQUARE PLAIN |
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F16-402
F16-442
F16-444
F16-662
F16-664 |
UBR 100
UG 39/U
UG 135/U
53C-009
53C-010 |
| SQUARE SEAL GROOVE |
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F16-412
F16-432
F16-434 |
PBR 100
083-0052
083-0148 |
| SQUARE CHOKE |
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F16-421
F16-481
F16-521
F16-511
F16-483
F16-513
F16-523
F16-453
F16-451 |
CBR 100
UG 40B/U
083-0051
083-1611
UG 136B/U
011-9114
012-0891
59D-014
59D-013 |
| ROUND PLAIN COUPLING |
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F16-252 |
083-0004 |
| ROUND SEAL GROOVE COUPLING |
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F16-474 |
083-0151 |
| ROUNG CHOKE COUPLING |
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F16-23
F16-533 |
083-0003
083-0150 |
WG17 R120 WR75
| Flanges for WG 17, R120, WR75 |
| Rectangular Flange Plain 6 hole |
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154 IEC - UDR 120 TWS F17-012 A=39.5mm B=49.50mm E=28.58mm G=15.88mm H=38.10mm red=4.31mm blue=4.09mm Thickness=7.5mm |
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| Rectangular Flange + seal groove 6 hole |
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154 IEC - PDR 120 TWS F17-031 A=39.5mm B=49.0mm E=28.58mm G=15.88mm H=38.10mm red=4.32mm blue=4.09mm Thickness=7.5mm |
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| Square Plain |
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154 IEC - UBR 120 TWS F17-402 A=38.10mm B=38.10mm E=28.50mm F=26.42mm hole dia 4.09mm Thickness=4.1mm |
MIL 3922/53C-007 TWS F17-442 A=38.10mm B=38.10mm E=28.50mm F=26.42mm hole dia 3.70mm dia Thickness=5.16mm |
MIL 3922/53C-013 TWS F17-662 A=38.35mm B=38.35mm E=28.50mm F=26.42mm hole dia 3.70mm Thickness=6.35mm |
MIL 3922/53C-014 TWS F17-664 (aluminium) A=38.35mm B=38.35mm E=28.50mm F=26.42mm hole dia 3.70mm Thickness=6.35mm |
| Square + seal groove |
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154 IEC - PBR 120 TWS F17-412 A=38.10mm B=38.10mm E=28.50mm F=26.42mm hole dia 4.09mm Thickness=4.1mm |
5985-99-014-1436 TWS F17-432 A=38.10mm B=38.10mm E=28.50mm F=26.40mm hole dia 3.70mm Thickness=4.1mm |
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| Square + seal groove + choke |
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154 IEC - CBR 120 TWS F17-421 A=38.10mm B=38.10mm E=28.50mm F=26.42mm hole dia 4.09mm Thickness=4.1mm |
5985-99-014-1437 TWS F17-521 A=38.10mm B=38.10mm E=28.50mm F=26.42mm hole dia 3.70mm Thickness=4.1mm |
MIL-F-3922/59D-010 TWS F17-481 A=38.10mm B=38.10mm E=28.50mm F=26.42mm hole dia:= 6/32 UNC tapped Thickness=5.16mm |
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WG18 R140 WR62 RG91/U
| Flanges for WG 18, R140, WR62, RG91/U1 |
| Rectangular Flange Plain 6 hole |
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154 IEC - UDR 140 TWS F18-012 A=36.5mm B=44.50mm E=25.4mm G=11.94mm H=33.34mm red=4.31mm blue=4.09mm Thickness=7.5mm |
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| Rectangular Flange + seal groove 6 hole |
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154 IEC - PDR 140 TWS F18-031 A=36.5mm B=44.5mm E=25.4mm G=11.94mm H=33.34mm red=4.31mm blue=4.09mm Thickness=7.5mm |
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| Square Plain |
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154 IEC - UBR 140 TWS F18-402 A=33.4mm B=33.4mm E=24.28mm F=25.25mm hole dia 4.09mm Thickness=4.1mm |
UG419/U TWS F18-442 A=33.35mm B=33.35mm E=24.28mm F=25.25mm hole dia 3.70mm Thickness=3.2mm |
UG1655/U TWS F18-444 (aluminium) A=33.55mm B=33.55mm E=24.28mm F=25.25mm hole dia 3.70mm Thickness=3.2mm |
53C-011 TWS F18-662 |
53C-012 TWS F18-664 (aluminium) |
53C-017 TWS F18-672 (aluminium) |
| Square + seal groove |
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154 IEC - PBR 140 TWS F18-412 A=33.4mm B=33.4mm E=24.28mm F=25.25mm hole dia 4.09mm Thickness=4.1mm |
5985-99-083-0030 TWS F18-432 A=33.4mm B=33.4mm E=24.28mm F=25.25mm hole dia 3.69mm Thickness=4.1mm |
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| Square + seal groove + choke |
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154 IEC - CBR 140 TWS F18-421 A=33.4mm B=33.4mm E=24.28mm F=25.25mm hole dia 4.09mm Thickness=4.1mm |
UG541A/U TWS F18-481 A=33.4mm B=33.4mm E=24.28mm F=25.25mm hole dia 6-32 UNC tapped Thickness=4.78mm |
5985-99-083-0029 TWS F18-521 A=33.4mm B=33.4mm E=24.30mm F=25.25mm hole dia 3.69mm Thickness=4.1mm |
UG1666/U TWS F18-483 (aluminium) A=33.4mm B=33.4mm E=24.28mm F=25.25mm hole dia:= 6-32 UNC tapped Thickness=4.78mm |
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| Round + seal groove coupling |
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5985-99-011-9662 TWS F18-222 A=33.32m B=30.86mm Thickness=5.08mm |
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| Round + seal groove + choke coupling |
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5985-99-011-9663 TWS F18-231 A=33.32m B=30.86mm Thickness=5.08mm |
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WG19 R180 WR51
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Flange No. |
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RECTANGULAR PLAIN
6 HOLE |
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F19-012 |
UDR 180 |
RECTANGULAR SEAL
GROOVE
6 HOLE |
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F19-031 |
PDR 180 |
| SQUARE PLAIN |
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F19-402 |
UBR 180 |
SQUARE SEAL
GROOVE |
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F19-412 |
PBR 180 |
| SQUARE CHOKE |
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F19-421 |
CBR 180 |
ROUND SEAL
GROOVE COUPLING |
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F19-222 |
011-9664 |
ROUND CHOKE
COUPLING |
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F19-231 |
011-9665 |
WG20 R220 WR42 RG53/U
| Flanges for WG 20, R220, WR42, RG53/U |
| Rectangular Flange Plain 6 hole |
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154 IEC - UDR 220 TWS F20-012 A=32.25mm B=38.25mm E=20mm G=10.2mm H=28mm red=3.26mm blue=3.08mm Thickness=6.5mm |
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| Rectangular Flange + seal groove 6 hole |
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154 IEC - PDR 220 TWS F20-031 A=32.25mm B=38.25mm E=20mm G=10.2mm H=28mm red=3.26mm blue=3.08mm Thickness=7.0mm |
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| Square Plain |
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154 IEC - UBR 220 TWS F20-402 A=22.35mm B=22.35mm E=17.02mm F=16.26mm hole dia 3.08mm Thickness=4.1mm |
UG595/U TWS F20-442 A=22.35mm B=22.35mm E=17.02mm F=16.26mm hole dia 2.98mm Thickness=4.78mm |
UG597/U TWS F20-444 (aluminium) A=22.35mm B=22.35mm E=17.02mm F=16.26mm hole dia 2.98mm Thickness=4.78mm |
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| Square + seal groove |
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154 IEC - PBR 220 TWS F20-412 A=22.35mm B=22.35mm E=17.02mm F=16.26mm hole dia 3.08mm Thickness=4.1mm |
5985-99-011-9658 TWS F20-432 A=22.35mm B=22.35mm E=17.02mm F=16.26mm hole dia 2.97mm Thickness=4.1mm |
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| Square + seal groove + choke |
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154 IEC - CBR 220 TWS F20-421 A=22.4mm B=22.4mm E=17.02mm F=16.26mm hole dia 3.08mm Thickness=4.1mm |
UG596A/U TWS F20-481 A=22.35mm B=22.35mm E=17.02mm F=16.26mm hole dia .112-40 UNC tapped Thickness=3.96mm |
5985-99-011-9659 TWS F20-521 |
UG598A/U TWS F20-483 (aluminium) A=22.35mm B=22.35mm E=17.02mm F=16.26mm hole dia:= .112-40 UNC tapped Thickness=3.96mm |
| Round + seal groove coupling |
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154 IEC - PCR 220 TWS F20-492 |
5985-99-011-9666 TWS F20-222 A=21.59mm B=19.3mm Thickness=4.83mm |
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| Round + seal groove + choke coupling |
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154 IEC - CCR 220 TWS F20-501 |
5985-99-011-9667 TWS F20-231 |
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WG21 R260 WR34
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Flange No. |
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RECTANGULAR
PLAIN 6 HOLE |
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F21-021 |
UDR 260 |
RECTANGULAR SEAL
GROOVE 6 HOLE |
|
F21-031 |
PDR 260 |
| SQUARE PLAIN |
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F21-402 F21-442 |
UBR 260 UG 1530/U |
SQUARE SEAL
GROOVE |
|
F21-412 |
PBR 260 |
| SQUARE CHOKE |
|
F21-421 |
CBR 260 |
ROUND SEAL
GROOVE COUPLING |
|
F21-492 |
PCR 260 |
WG22 R320 WR28 RG96/U
| Flanges for WG 22, R320, WR28, RG96/U |
| Rectangular Flange Plain 6 hole |
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154 IEC - UDR 320 TWS F22-012 |
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| Rectangular Flange + seal groove 6 hole |
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154 IEC - PDR 320 TWS F22-031 A=31.25mm B=34.25mm E=19.4mm G=10.2mm H=24.4mm red=3.26mm blue=3.08mm Thickness=6.5mm |
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| Square Plain |
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154 IEC - UBR 320 TWS F22-402 A=19.18mm B=19.18mm E=13.46mm F=12.7mm hole dia 3.08mm Thickness=4.1mm |
UG599/U TWS F22-442 (hole spacing and diameters identical to 5985-99-012-4834) A=19.05mm B=19.05mm E=13.46mm F=12.7mm hole dia 2.98mm Thickness=4.75mm |
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| Square + seal groove |
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154 IEC - PBR 320 TWS F22-412 A=19.18mm B=19.18mm E=13.46mm F=12.7mm hole dia 3.08mm Thickness=4.1mm |
5985-99-012-4834 TWS F22-432 E=13.46mm F=12.7mm hole dia 2.98mm |
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| Square + seal groove + choke |
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154 IEC - CBR 320 TWS F22-421 |
UG600A/U TWS F22-481 A=19.18mm B=19.18mm E=13.46mm F=12.6mm hole dia .112-40 UNC tapped Thickness=2.77mm |
5985-99-012-4835 TWS F22-521 |
59D012 TWS F22-451 |
| Round coupling |
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5985-99-083-0019 TWS F22-252 |
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| Round + seal groove coupling |
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154 IEC - PCR 320 TWS F22-492 A=18.68mm B=16.08mm Thickness=4.9mm |
5985-99-083-0018 TWS F22-222 |
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Notes:
Material
The flange and waveguide materials should match i.e. aluminium flanges for aluminium waveguide or brass flanges for copper or brass waveguide.
Choke flanges
A choke flange must be used together with a plain flange - it is usually used for very high powers to improve the apparent contact of the joint, but as the choke is frequency sensitive, the match seen at the top and bottom of the band is generally worse than a plain / plain combination. .An alternative to a choke / plain joint for high powers is a plain / plain joint together with a high power shim. The shims are generally crushable (single use) or have sprung fingers to ensure good contact. Choke flanges are more sensitive to misalignment so the correct bolts should be used - fixing kits can be supplied to suit.
For more details and prices please use the product enquiry form or contact our sales team.
Specifications
Download the Flanges (Flat, Groove and Choke) specifications.
03_waveguide_flanges_1.0e_new.pdf
