GJB599 Series IV quarter-turn plug and square-flange receptacle — Representative image

GJB599 Series IV Quarter-Turn Circular Connectors (38999 Series IV Type)

38999 Series IV type · 90° quarter-turn coupling · shell sizes 11–25

GJB599 Series IV is our 38999 Series IV-type connector: a 90° rotation of the coupling ring mates and locks it. It is built to GJB 599A Series IV, with high contact density, EMI shielding, an enhanced interfacial seal and shell sizes 11 to 25, including hermetic receptacles.

Coupling: Quarter-turn (90°)
Shell sizes: 11 to 25
Insert arrangements: 123
Contact sizes: 22D to 10 (5–33 A)
Temperature: −65 to +200 °C

Key features

Quarter-turn coupling: rotate 90° to mate and lock
Built to GJB 599A Series IV, the Chinese counterpart of MIL-DTL-38999 Series IV
Enhanced interfacial seal protects contacts from moisture and electrolytic corrosion
Scoop-proof and keyed (six key positions) to prevent mismating
Size 12 cavities accept coax, shielded or power contacts
Seven shell finishes including titanium; hermetic receptacles in stainless steel

Specifications

Electrical
Parameter	Value	Condition
Shell-to-shell conductivity	1–10 mΩ	Depends on finish — see finish table
EMI shielding	45–65 dB at 10 GHz; 85 dB at 1 GHz (F)	Depends on finish — see finish table
Dielectric withstanding voltage	Tested to your requirements

Mechanical and environmental
Parameter	Value	Condition
Coupling	Quarter-turn, 90°
Coupling thread	M15 × 1 to M37 × 1
Operating temperature	−65 to +200 °C	−65 to +175 °C for cadmium finish
Salt spray	48–500 h	Depends on finish — see finish table

GJB 599A Series IV — Chinese specification for Series IV quarter-turn circular connectors, the counterpart of MIL-DTL-38999 Series IV.

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 code	Version	Notes
J599/40	Wall-mount square-flange receptacle
J599/42	Box-mount square-flange receptacle
J599/44	Jam-nut receptacle
J599/49	In-line (cable) receptacle
J599/46 / 47	Shielded plug / unshielded plug
J599/41 / 43 / 45 / 48	Hermetic receptacles: square flange / jam nut / solder mount / weld mount

Shell materials and finishes

Code	Shell material	Finish	Shell conductivity	EMI shielding	Temperature	Salt spray
F	Aluminum alloy	Nickel	1 mΩ	65 dB at 10 GHz; 85 dB at 1 GHz	−65 to +200 °C	48 h
W	Aluminum alloy	Olive-drab cadmium	2.5 mΩ	50 dB at 10 GHz	−65 to +175 °C	500 h
K	Stainless steel	Passivated	10 mΩ	45 dB at 10 GHz	−65 to +200 °C	500 h
S	Stainless steel	Nickel	1 mΩ	65 dB at 10 GHz	−65 to +200 °C	48 h
TA	Titanium alloy	None	10 mΩ	65 dB at 10 GHz	−65 to +200 °C	500 h
Y	Stainless steel (hermetic)	Passivated	10 mΩ	45 dB at 10 GHz	−65 to +200 °C	500 h
N	Stainless steel (hermetic)	Nickel	1 mΩ	65 dB at 10 GHz	−65 to +200 °C	48 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	AWG 22–26 (0.13–0.33 mm²)
22	0.76 mm	Tested to your requirements	—	5 A	AWG 22–26
20	1.02 mm	≤ 7.3 mΩ	≤ 12.0 mΩ	7.5 A	AWG 20–24 (0.20–0.52 mm²)
16	1.58 mm	≤ 3.7 mΩ	≤ 8.5 mΩ	13 A	AWG 16–20 (0.52–1.31 mm²)
12	2.41 mm	≤ 1.83 mΩ	≤ 5 mΩ	23 A	AWG 12–14 (2.08–3.31 mm²)
10	3.20 mm	≤ 1 mΩ	—	33 A	AWG 10 (5.26 mm²)
8 twinax	—	Tested to your requirements	—	Signal (twinax)	Twinax cable to your requirements

How to order

J599/ [type] [finish] [shell] [arrangement] [contact] [key] [suffix]

Example: J599/40FB35PN — Wall-mount square-flange receptacle, aluminum with nickel, shell B (size 11), arrangement 11-35, pin contacts, key N

Code segment	Options
Type	`40 / 42` Square-flange receptacle, wall / box mount `44` Jam-nut receptacle `49` In-line (cable) receptacle `46 / 47` Shielded / unshielded plug `41 / 43 / 45 / 48` Hermetic: square flange / jam nut / solder mount / weld mount
Finish	`F / W` Aluminum — nickel / olive-drab cadmium `S / K` Stainless steel — nickel / passivated `TA` Titanium alloy `N / Y` Hermetic stainless steel — nickel / passivated
Shell	`B C D E F G H J` Shell size 11, 13, 15, 17, 19, 21, 23, 25
Arrangement	`e.g. 35` See the insert arrangement table below
Contact	`P / S` Pin / socket `P` Hermetic pin (hermetic receptacles)
Key	`N` Normal `A B C D K` Alternate
Suffix	`V` 200 °C oil-resistant seals `H` Solder contacts (crimp if not marked)

Hermetic receptacles do not use layouts with coax, shielded or twinax contacts.

Insert arrangements

123 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

123 layouts

Arrangement	Contacts	Contact sizes	Service rating
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
15-4B	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
17-20	20	4 × size 12, 16 × 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

Rail and transit equipment
Industrial automation
Test and measurement systems
Energy and power equipment
Marine and offshore electronics

Frequently asked questions

How does Series IV coupling work?

Series IV uses a breech-lock style coupling: push the plug in and turn the coupling ring 90° to lock. It mates faster than a threaded connector and locks positively.

Can GJB599 Series IV replace my D38999 Series IV parts?

GJB599 Series IV is built to GJB 599A Series IV, the counterpart of MIL-DTL-38999 Series IV. Send us your D38999 part number and we will propose the matching configuration and samples for your mating test.

Selection guides

38999 Series I, II, III and IV: What Is the Difference?

From sample to production

Send your requirement
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 made to your order. 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.

Need a quote or a drawing?

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

Request a quote

GJB599 Series IV Quarter-Turn Circular Connectors (38999 Series IV Type)

Key features

Specifications

Versions

Shell materials and finishes

Contact sizes and current ratings

How to order

Insert arrangements

Typical applications

Frequently asked questions

Selection guides

From sample to production

Send your requirement

Configuration and quote

Samples

Your approval

Series production

Need a quote or a drawing?

Related series

J1784 Backshells for 38999-Type Connectors

J599 Series III Circular Connectors (38999 Series III Type)

Protective Caps for 38999-Type Plugs and Receptacles

GJB599 Series I Bayonet Circular Connectors (38999 Series I Type)