SHX16 watertight 38999-type square-flange receptacle

SHX16 QJ mechanical backshell with spring strain relief

SHX16 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

Request a quote Request drawing Download datasheet (PDF)PDF, 287 KB

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
Parameter	Value	Condition
Dielectric withstanding voltage, service rating I	1800 V / 1000 V / 1000 V	Sea level / 21,336 m / 30,480 m altitude, mated
Dielectric withstanding voltage, service rating II	2300 V / 1000 V / 1000 V	Sea level / 21,336 m / 30,480 m altitude, mated
Dielectric withstanding voltage, service rating M	1300 V / 800 V / 800 V	Sea level / 21,336 m / 30,480 m altitude, mated
Dielectric withstanding voltage, service rating N	1000 V / 600 V / 600 V	Sea level / 21,336 m / 30,480 m altitude, mated
Insulation resistance	≥ 5000 MΩ	Room temperature
Insulation resistance	≥ 1000 MΩ / ≥ 200 MΩ	High temperature, unsealed / hermetic
Insulation resistance	≥ 1000 MΩ	Low-pressure immersion
Insulation resistance	≥ 100 MΩ	Humidity

Mechanical and environmental
Parameter	Value	Condition
Hydrostatic pressure, mated	0.5 MPa
Hermetic leak rate	≤ 1 × 10⁻⁸ Pa·m³/s	SHX16/21 axially sealed receptacle, 0.1 MPa differential
Durability	500 mating cycles
Random vibration	50–2000 Hz, 1 g²/Hz (100–2000 Hz), 2 × 8 h	Ambient temperature
Shock	300 g, half-sine, 3 ms
Operating temperature	−40 to +120 °C
Mold resistance	Grade 2, 28 days	GJB 150A

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

Parameters not listed above — for example vibration level, leak rate or other environmental tests — can be tested to your requirements, including third-party testing.

Versions

Series code	Version	Notes
SHX16/26	Threaded plug
SHX16/20	Square-flange receptacle
SHX16/21	Hermetic square-flange receptacle	Axially watertight; stainless steel (K) only
SHX16QJ	Mechanical watertight backshell	Packing-gland clamp, 360° shielding; plugs only
SHX16QG	Potted backshell
SHX16/20 or /26 …BHG	Sealing caps for receptacle or plug

Shell materials and finishes

Code	Shell material	Finish	Shell conductivity	EMI shielding	Temperature	Salt spray
N	Aluminum alloy	Electroless nickel	—	—	−40 to +120 °C	48 h
K	Stainless steel	Passivated	—	—	−40 to +120 °C	500 h
C	Aluminum bronze	Nickel	—	—	−40 to +120 °C	1000 h

Contact sizes and current ratings

Contact size	Engaging diameter	Contact resistance	Contact resistance (hermetic)	Current rating	Wire size
22D	0.76 mm	≤ 14.6 mΩ	≤ 28 mΩ	5 A	—
20	1.02 mm	≤ 7.3 mΩ	≤ 12.0 mΩ	7.5 A	—
16	1.58 mm	≤ 3.7 mΩ	≤ 8.5 mΩ	13 A	—
12	2.41 mm	≤ 1.83 mΩ	≤ 5 mΩ	23 A	—
10	3.20 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 segment	Options
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).

Shell sizeMinimum contactsContact size

126 layouts

Arrangement	Contacts	Contact sizes	Service rating
9-03	3	3 × size 20	I
9-35	6	6 × size 22D	M
9-44	4	4 × size 22	M
9-98	3	3 × size 20	I
11-02	2	2 × size 16	I
11-04	4	4 × size 20	I
11-05	5	5 × size 20	I
11-08a	8	4 × size 20, 4 × size 22D	M
11-35	13	13 × size 22D	M
11-98	6	6 × size 20	I
11-99	7	7 × size 20	I
13-03	3	3 × size 16	II
13-04	4	4 × size 16	I
13-06	6	2 × size 12, 4 × size 20	M
13-06A	6	2 × size 16, 4 × size 20	M
13-08	8	8 × size 20	I
13-08A	8	4 × size 16, 4 × size 20	M
13-12	12	1 × size 12 coax, 11 × size 22D	M
13-12A	12	12 × size 20	N
13-16	16	3 × size 16, 13 × size 22D	N
13-35	22	22 × size 22D	M
13-98	10	10 × size 20	I
15-03	3	2 × size 12, 1 × size 16	I
15-04A	4	4 × size 12	M
15-04B	4	4 × size 12 coax	N
15-05	5	5 × size 16	II
15-06A	6	6 × size 16	M
15-13	13	4 × size 16, 2 × size 20, 7 × size 22D	M
15-14	14	6 × size 16, 8 × size 22D	N
15-15	15	1 × size 16, 14 × size 20	I
15-18	18	18 × size 20	I
15-19	19	19 × size 20	I
15-23	23	3 × size 16, 2 × size 20, 18 × size 22D	M
15-32	32	9 × size 20, 23 × size 22D	M
15-35	37	37 × size 22D	M
15-97	12	4 × size 16, 8 × size 20	I
17-02	39	1 × size 8 twinax, 38 × size 22D	M
17-06	6	6 × size 12	I
17-06C	6	4 × size 12, 2 × size 22	I
17-08	8	8 × size 16	II
17-14	14	2 × size 12, 4 × size 16, 8 × size 20	M
17-15	15	5 × size 12 coax, 10 × size 22D	M
17-19	19	4 × size 16, 11 × size 20, 4 × size 22D	M
17-26	26	26 × size 20	I
17-28A	28	3 × size 12, 25 × size 22D	M
17-30	6	3 × size 10, 3 × size 20	N
17-35	55	55 × size 22D	M
17-42	42	42 × size 22	M
17-75	2	2 × size 8 twinax	N
17-99	23	2 × size 16, 21 × size 20	I
19-06A	6	3 × size 12 coax, 3 × size 16	N
19-11	11	11 × size 16	II
19-13	13	8 × size 12, 5 × size 20	I
19-17	17	2 × size 12, 15 × size 20	M
19-18	18	4 × size 8 twinax, 14 × size 22D	M
19-18A	18	4 × size 12 coax, 14 × size 22D	M
19-20	20	8 × size 16, 4 × size 20, 8 × size 22D	M
19-22	22	7 × size 12, 15 × size 22D	M
19-28	28	2 × size 16, 26 × size 20	I
19-30	30	1 × size 16, 29 × size 20	I
19-32	32	32 × size 20	I
19-35	66	66 × size 22D	M
19-45	67	67 × size 22D	M
19-53	53	53 × size 22	M
19-82	8	8 × size 12 coax	I
19-96	9	9 × size 12	I
21-10A	10	10 × size 12 coax	II
21-11	11	11 × size 12	I
21-13	13	2 × size 10, 7 × size 12, 4 × size 20	M
21-16	16	16 × size 16	II
21-24	24	24 × size 20	I
21-25	25	25 × size 20	I
21-27	27	27 × size 20	I
21-28	28	3 × size 10, 25 × size 22D	I
21-35	79	79 × size 22D	M
21-35A	68	2 × size 12 coax, 66 × size 22D	M
21-39	39	2 × size 16, 37 × size 20	I
21-39A	39	2 × size 8 twinax, 4 × size 16, 33 × size 22D	M
21-41	41	41 × size 20	I
21-61	61	6 × size 16, 55 × size 22D	M
21-75	4	4 × size 8 twinax	N
21-75A	4	4 × size 12	I
23-02	85	85 × size 22	M
23-06H	6	6 × size 10	II
23-14	14	14 × size 12	I
23-21	21	21 × size 16	II
23-26	26	8 × size 12, 18 × size 20	M
23-32	32	32 × size 20	I
23-34	34	34 × size 20	I
23-34A	34	4 × size 12, 16 × size 16, 14 × size 22D	M
23-35	100	100 × size 22D	M
23-36	36	36 × size 20	I
23-44a	44	2 × size 10, 4 × size 12, 38 × size 22D	M
23-53	53	53 × size 20	I
23-55	55	55 × size 20	I
23-70	70	10 × size 20, 60 × size 22D	M
23-72	72	2 × size 8 twinax, 70 × size 22D	M
23-86	86	16 × size 20, 70 × size 22D	M
23-97	16	16 × size 16	I
23-99	11	11 × size 16	II
25-02	100	100 × size 22	M
25-04	56	8 × size 16, 48 × size 20	I
25-07	99	2 × size 8 twinax, 97 × size 22D	M
25-08	8	8 × size 8 twinax	N
25-10	10	6 × size 10, 4 × size 12	N
25-11	11	9 × size 10, 2 × size 20	N
25-19	19	19 × size 12	I
25-20	30	3 × size 8 twinax, 1 × size 12 coax, 3 × size 12 shielded, 13 × size 16, 10 × size 20	N
25-24	24	12 × size 12, 12 × size 16	I
25-29	29	29 × size 16	I
25-31	31	2 × size 8 twinax, 5 × size 10, 12 × size 16, 12 × size 20	M
25-32	32	6 × size 10, 10 × size 16, 16 × size 20	M
25-35	128	128 × size 22D	M
25-35A	35	11 × size 12 coax, 24 × size 20	M
25-36	36	2 × size 8 twinax, 4 × size 10, 8 × size 16, 22 × size 20	N
25-39	39	2 × size 12, 17 × size 16, 20 × size 20	M
25-43	43	20 × size 16, 23 × size 20	I
25-45	45	8 × size 12, 37 × size 20	M
25-46	46	2 × size 8 twinax, 4 × size 16, 40 × size 20	I
25-61	61	61 × size 20	I
25-64a	64	8 × size 16, 40 × size 20, 16 × size 22D	M
25-69	69	10 × size 16, 15 × size 20, 44 × size 22D	M
25-92	92	4 × size 20, 88 × size 22D	M
25-93	118	8 × size 16, 110 × size 22D	M
25-94	94	4 × size 12 coax, 8 × size 16, 82 × size 22D	M
25-118G	118	8 × size 16, 110 × size 22D	N

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

Send your requirements
Part number, drawing, pin-out or a short description of your application.
Configuration and quote
Our engineers match the configuration and reply with a drawing and quotation.
Samples
Samples are built to order. The minimum order quantity is 10 pieces, and samples and production orders each take 4–8 weeks. Third-party testing to your specification is available on request.
Your approval
You test the samples in your own equipment and approve them.
Series production
Production follows the approved sample configuration, with machining, molding, plating and assembly in our own Shenyang factory.

Need a quote or a drawing?

Send your part number, pin-out or drawing. Every inquiry is acknowledged by email within 1 business day, and an engineer follows up with a matched configuration, drawing or quotation.

Request a quote

SHX16 Watertight 38999-Type Circular Connectors

Key features

Specifications

Versions

Shell materials and finishes

Contact sizes and current ratings

How to order

Insert arrangements

Typical applications

Frequently asked questions

Related series

SHX15 Watertight Threaded Circular Connectors, Stainless Steel

YMG Marine Corrosion-Resistant Bayonet Circular Connectors

From sample to production

Send your requirements

Configuration and quote

Samples

Your approval

Series production

Need a quote or a drawing?