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SHX16 watertight 38999-type square-flange receptacle
Representative image
SHX16 QG potted backshellSHX16 QJ mechanical backshell with spring strain reliefSHX16 sealing caps for plug and receptacle

SHX16 Watertight 38999-Type Circular Connectors

38999 type · 0.5 MPa mated · 126 insert arrangements

SHX16 adds watertight sealing to the 38999-type circular connector. Based on GJB 599B (the MIL-DTL-38999 counterpart), it keeps the Series III insert arrangements, removable contacts and EMI shielding, and withstands 0.5 MPa hydrostatic pressure when mated. A hermetic, axially sealed receptacle is also available.

Mated hydrostatic pressure
0.5 MPa
Insert arrangements
126
Contact sizes
22D to 10 (5–33 A)
Temperature
−40 to +120 °C
Salt spray
48–1000 h

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Key features

  • Withstands 0.5 MPa hydrostatic pressure when mated
  • 38999-type insert arrangements, including coax, shielded and twinax contacts
  • EMI/RFI shielding; removable crimp contacts (except hermetic receptacles); solder and PCB contacts available
  • Five-key polarization with six key positions
  • Hermetic SHX16/21 receptacle, axially sealed, leak rate ≤ 1 × 10⁻⁸ Pa·m³/s
  • Watertight mechanical and potted backshells and sealing caps
  • Custom contact counts, cable lengths and materials on request.

Specifications

Electrical
ParameterValueCondition
Dielectric withstanding voltage, service rating I1800 V / 1000 V / 1000 VSea level / 21,336 m / 30,480 m altitude, mated
Dielectric withstanding voltage, service rating II2300 V / 1000 V / 1000 VSea level / 21,336 m / 30,480 m altitude, mated
Dielectric withstanding voltage, service rating M1300 V / 800 V / 800 VSea level / 21,336 m / 30,480 m altitude, mated
Dielectric withstanding voltage, service rating N1000 V / 600 V / 600 VSea level / 21,336 m / 30,480 m altitude, mated
Insulation resistance≥ 5000 MΩRoom temperature
Insulation resistance≥ 1000 MΩ / ≥ 200 MΩHigh temperature, unsealed / hermetic
Insulation resistance≥ 1000 MΩLow-pressure immersion
Insulation resistance≥ 100 MΩHumidity
Mechanical and environmental
ParameterValueCondition
Hydrostatic pressure, mated0.5 MPa
Hermetic leak rate≤ 1 × 10⁻⁸ Pa·m³/sSHX16/21 axially sealed receptacle, 0.1 MPa differential
Durability500 mating cycles
Random vibration50–2000 Hz, 1 g²/Hz (100–2000 Hz), 2 × 8 hAmbient temperature
Shock300 g, half-sine, 3 ms
Operating temperature−40 to +120 °C
Mould resistanceGrade 2, 28 daysGJB 150A

GJB 599B — Chinese specification for 38999-type circular connectors (counterpart of MIL-DTL-38999); SHX16 follows its requirements and adds watertight sealing.

Values not listed above — for example vibration level, leak rate or other environmental tests — can be tested to your requirements, including third-party testing. Specifications are subject to change; contact us for the current datasheet.

Versions

Series codeVersionNotes
SHX16/26Threaded plug
SHX16/20Square-flange receptacle
SHX16/21Hermetic square-flange receptacleAxially watertight; stainless steel (K) only
SHX16QJMechanical watertight backshellPacking-gland clamp, 360° shielding; plugs only
SHX16QGPotted backshell
SHX16/20 or /26 …BHGSealing caps for receptacle or plug

Shell materials and finishes

CodeShell materialFinishShell conductivityEMI shieldingTemperatureSalt spray
NAluminum alloyElectroless nickel——−40 to +120 °C48 h
KStainless steelPassivated——−40 to +120 °C500 h
CAluminum bronzeNickel——−40 to +120 °C1000 h

Contact sizes and current ratings

Contact sizeEngaging diameterContact resistanceContact resistance (hermetic)Current ratingWire size
22D0.76 mm≤ 14.6 mΩ≤ 28 mΩ5 A—
201.02 mm≤ 7.3 mΩ≤ 12.0 mΩ7.5 A—
161.58 mm≤ 3.7 mΩ≤ 8.5 mΩ13 A—
122.41 mm≤ 1.83 mΩ≤ 5 mΩ23 A—
103.20 mm≤ 1 mΩ—33 A—

How to order

SHX16/ [type] [finish] [shell] [arrangement] [contact] [key] [termination] [options]

Example: SHX16/26K1735PN — Threaded plug, stainless steel, shell 17, arrangement 17-35, pin contacts, key position N

Code segmentOptions
Type
  • 20 Square-flange receptacle
  • 21 Hermetic square-flange receptacle (K only)
  • 26 Plug
Finish
  • N Aluminum alloy, electroless nickel
  • K Stainless steel, passivated
  • C Aluminum bronze, nickel
Shell
  • 09 – 25 9, 11, 13, 15, 17, 19, 21, 23, 25
Arrangement
  • e.g. 35 See the insert arrangement table below
Contact
  • P / S Pin / socket
  • PL / SL PCB pin / PCB socket
Key
  • N Normal key position
  • A B C D E Alternate key positions
Termination
  • (none) Crimp
  • H Solder
Options
  • F Oil-resistant (fluorosilicone seals)

Insert arrangements

126 standard layouts, viewed from the mating face of the pin insert. The arrangement number is written as shell size – layout (for example 25-35). The service rating sets the withstanding voltage (see specifications).

126 layouts

ArrangementContactsContact sizesService rating
9-0333 × size 20I
9-3566 × size 22DM
9-4444 × size 22M
9-9833 × size 20I
11-0222 × size 16I
11-0444 × size 20I
11-0555 × size 20I
11-08a84 × size 20, 4 × size 22DM
11-351313 × size 22DM
11-9866 × size 20I
11-9977 × size 20I
13-0333 × size 16II
13-0444 × size 16I
13-0662 × size 12, 4 × size 20M
13-06A62 × size 16, 4 × size 20M
13-0888 × size 20I
13-08A84 × size 16, 4 × size 20M
13-12121 × size 12 coax, 11 × size 22DM
13-12A1212 × size 20N
13-16163 × size 16, 13 × size 22DN
13-352222 × size 22DM
13-981010 × size 20I
15-0332 × size 12, 1 × size 16I
15-04A44 × size 12M
15-04B44 × size 12 coaxN
15-0555 × size 16II
15-06A66 × size 16M
15-13134 × size 16, 2 × size 20, 7 × size 22DM
15-14146 × size 16, 8 × size 22DN
15-15151 × size 16, 14 × size 20I
15-181818 × size 20I
15-191919 × size 20I
15-23233 × size 16, 2 × size 20, 18 × size 22DM
15-32329 × size 20, 23 × size 22DM
15-353737 × size 22DM
15-97124 × size 16, 8 × size 20I
17-02391 × size 8 twinax, 38 × size 22DM
17-0666 × size 12I
17-06C64 × size 12, 2 × size 22I
17-0888 × size 16II
17-14142 × size 12, 4 × size 16, 8 × size 20M
17-15155 × size 12 coax, 10 × size 22DM
17-19194 × size 16, 11 × size 20, 4 × size 22DM
17-262626 × size 20I
17-28A283 × size 12, 25 × size 22DM
17-3063 × size 10, 3 × size 20N
17-355555 × size 22DM
17-424242 × size 22M
17-7522 × size 8 twinaxN
17-99232 × size 16, 21 × size 20I
19-06A63 × size 12 coax, 3 × size 16N
19-111111 × size 16II
19-13138 × size 12, 5 × size 20I
19-17172 × size 12, 15 × size 20M
19-18184 × size 8 twinax, 14 × size 22DM
19-18A184 × size 12 coax, 14 × size 22DM
19-20208 × size 16, 4 × size 20, 8 × size 22DM
19-22227 × size 12, 15 × size 22DM
19-28282 × size 16, 26 × size 20I
19-30301 × size 16, 29 × size 20I
19-323232 × size 20I
19-356666 × size 22DM
19-456767 × size 22DM
19-535353 × size 22M
19-8288 × size 12 coaxI
19-9699 × size 12I
21-10A1010 × size 12 coaxII
21-111111 × size 12I
21-13132 × size 10, 7 × size 12, 4 × size 20M
21-161616 × size 16II
21-242424 × size 20I
21-252525 × size 20I
21-272727 × size 20I
21-28283 × size 10, 25 × size 22DI
21-357979 × size 22DM
21-35A682 × size 12 coax, 66 × size 22DM
21-39392 × size 16, 37 × size 20I
21-39A392 × size 8 twinax, 4 × size 16, 33 × size 22DM
21-414141 × size 20I
21-61616 × size 16, 55 × size 22DM
21-7544 × size 8 twinaxN
21-75A44 × size 12I
23-028585 × size 22M
23-06H66 × size 10II
23-141414 × size 12I
23-212121 × size 16II
23-26268 × size 12, 18 × size 20M
23-323232 × size 20I
23-343434 × size 20I
23-34A344 × size 12, 16 × size 16, 14 × size 22DM
23-35100100 × size 22DM
23-363636 × size 20I
23-44a442 × size 10, 4 × size 12, 38 × size 22DM
23-535353 × size 20I
23-555555 × size 20I
23-707010 × size 20, 60 × size 22DM
23-72722 × size 8 twinax, 70 × size 22DM
23-868616 × size 20, 70 × size 22DM
23-971616 × size 16I
23-991111 × size 16II
25-02100100 × size 22M
25-04568 × size 16, 48 × size 20I
25-07992 × size 8 twinax, 97 × size 22DM
25-0888 × size 8 twinaxN
25-10106 × size 10, 4 × size 12N
25-11119 × size 10, 2 × size 20N
25-191919 × size 12I
25-20303 × size 8 twinax, 1 × size 12 coax, 3 × size 12 shielded, 13 × size 16, 10 × size 20N
25-242412 × size 12, 12 × size 16I
25-292929 × size 16I
25-31312 × size 8 twinax, 5 × size 10, 12 × size 16, 12 × size 20M
25-32326 × size 10, 10 × size 16, 16 × size 20M
25-35128128 × size 22DM
25-35A3511 × size 12 coax, 24 × size 20M
25-36362 × size 8 twinax, 4 × size 10, 8 × size 16, 22 × size 20N
25-39392 × size 12, 17 × size 16, 20 × size 20M
25-434320 × size 16, 23 × size 20I
25-45458 × size 12, 37 × size 20M
25-46462 × size 8 twinax, 4 × size 16, 40 × size 20I
25-616161 × size 20I
25-64a648 × size 16, 40 × size 20, 16 × size 22DM
25-696910 × size 16, 15 × size 20, 44 × size 22DM
25-92924 × size 20, 88 × size 22DM
25-931188 × size 16, 110 × size 22DM
25-94944 × size 12 coax, 8 × size 16, 82 × size 22DM
25-118G1188 × size 16, 110 × size 22DN

Typical applications

  • Shipboard and deck equipment
  • Offshore platforms and marine electronics
  • Ports, dredging and workboat equipment
  • Outdoor and wet industrial installations

Frequently asked questions

Is SHX16 the same as a 38999 Series III connector?

SHX16 follows GJB 599B, the Chinese counterpart of MIL-DTL-38999, with the same type of insert arrangements, and adds watertight sealing to 0.5 MPa when mated. Send us your part number and we will propose the matching configuration and samples for your own mating test.

Do you have a hermetic version?

Yes. The SHX16/21 axially sealed receptacle (stainless steel) has a leak rate ≤ 1 × 10⁻⁸ Pa·m³/s at 0.1 MPa differential.

Which finish suits seawater?

Aluminum bronze with nickel (C, 1000 h salt spray) or passivated stainless steel (K, 500 h).

From sample to production

  1. Send your requirement

    Part number, drawing, pin-out or a short description of your application.

  2. Configuration and quote

    Our engineers match the configuration and reply with a drawing and quotation.

  3. Samples

    Samples are made to your order. Third-party testing to your specification is available on request.

  4. Your approval

    You test the samples in your own equipment and approve them.

  5. Series production

    Production follows the approved sample configuration.

Need a quote or a drawing?

Send your part number, pin-out or drawing. An engineer will reply by email.

Request a quote

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