J599/26 Plugs, D38999/26-Type (MIL-DTL-38999 Series III Type)
The J599/26 is the cable-side plug of our J599 Series III family, with triple-start threaded coupling and removable crimp contacts.
- Coupling
- Triple-start thread, self-locking
- Shell sizes
- 9 to 25 (codes A–J)
- Contacts
- Crimp pin (P) or socket (S), sizes 26 to 10
- Mating cycles
- 500 (1500 with H/J contacts, composite shells)
J599/26 is the plug in our J599 Series III range, built to GJB 599B Series III, the Chinese counterpart of MIL-DTL-38999 Series III. The coupling nut has a triple-start thread with an anti-decoupling device, so the plug locks under vibration and needs no lock wire to stay mated. The plug is scoop-proof and keyed, with a normal key position N and alternate positions A to E.
Contacts are crimp, removable, from size 26 (2 A) to size 10 (33 A), with coax, shielded and twinax contacts in selected layouts. For composite shells, H (pin) and J (socket) contacts raise durability from 500 to 1500 mating cycles. The -U suffix gives the reverse-side plug used on the rear face of hermetic feed-through receptacles.
When to choose this style
- You need the cable-side half of a J599/20, /24 or hermetic receptacle, or of a J599/20-D17 / -E17 double-flange PCB receptacle.
- Your cable sees vibration or shock and you want a threaded, self-locking coupling rather than bayonet.
- You mate the plug often: choose a composite shell with H/J contacts for 1500 cycles.
- You run a cable through a sealed bulkhead: use a standard plug on the front and a -U reverse-side plug on the rear of a J599/20…C or /24…C feed-through receptacle.
- You need fuel or oil resistance (V, fluorosilicone seals) or thermocouple contacts (R(X), NiCr–NiSi pairs).
Ordering example
J599/26MC35HN
| Segment | Code | Meaning |
|---|---|---|
| Type | 26 | Plug |
| Class | (none) | Standard |
| Finish | M | Composite, nickel |
| Shell | C | Shell size 13 |
| Arrangement | 35 | Layout 13-35: 22 × size 22D contacts |
| Contact | H | Pin, 1500 mating cycles (composite shells) |
| Key | N | Normal key position |
Reverse-side version for the rear of a feed-through receptacle: J599/26FB35SN-U (aluminum, nickel; shell 11; layout 11-35, 13 × size 22D; socket contacts; key N; -U reverse-side plug).
A plug mates with a receptacle of the same shell size, layout and key position and the opposite contact gender. Use a different key position for each connector of the same size and layout on one panel.
Dimensions (mm)
| Shell sizes | Code | A | Bmax |
|---|---|---|---|
| 9 | A | 21.4 | M12×1-6g |
| 11 | B | 24.5 | M15×1-6g |
| 13 | C | 29 | M18×1-6g |
| 15 | D | 32 | M22×1-6g |
| 17 | E | 35.2 | M25×1-6g |
| 19 | F | 38.2 | M28×1-6g |
| 21 | G | 41.2 | M31×1-6g |
| 23 | H | 44.4 | M34×1-6g |
| 25 | J | 47.5 | M37×1-6g |
| Shell sizes | Code | A max | Bmax |
|---|---|---|---|
| 9 | A | 21.8 | M12×1-6g |
| 11 | B | 25 | M15×1-6g |
| 13 | C | 29.4 | M18×1-6g |
| 15 | D | 32.5 | M22×1-6g |
| 17 | E | 35.7 | M25×1-6g |
| 19 | F | 38.5 | M28×1-6g |
| 21 | G | 41.7 | M31×1-6g |
| 23 | H | 44.9 | M34×1-6g |
| 25 | J | 48 | M37×1-6g |
| Shell sizes | Code | A | Bmax |
|---|---|---|---|
| 9 | A | 21.6 | M12×1-6g |
| 11 | B | 24.8 | M15×1-6g |
| 13 | C | 29.2 | M18×1-6g |
| 15 | D | 32.3 | M22×1-6g |
| 17 | E | 35.5 | M25×1-6g |
| 19 | F | 38.3 | M28×1-6g |
| 21 | G | 41.5 | M31×1-6g |
| 23 | H | 44.7 | M34×1-6g |
| 25 | J | 48 | M37×1-6g |
Frequently asked questions
Is the J599/26 the same as a D38999/26 plug?
J599/26 is a D38999/26-Type plug built to GJB 599B Series III, the Chinese counterpart of MIL-DTL-38999 Series III, with shell sizes 9–25. Send us your D38999 part number; we will propose the matching configuration and samples for your own mating test.
What is the -U plug?
The -U suffix marks the reverse-side plug. It mates with the rear face of a J599/20…C or J599/24…C hermetic feed-through receptacle, while a standard plug mates with the front face.
How do I get 1500 mating cycles?
Order a composite shell (finish M or J) with H (pin) or J (socket) contacts. Standard P/S crimp contacts are rated 500 cycles.
Which backshell and cap fit the plug?
J1784 backshells thread onto the plug in unshielded, cable-clamp and shielded versions, straight or 90°. The plug cap is J599/32 plus finish, shell size and lanyard code, for example J599/32F09R. Caps and backshells are ordered separately.
What are the MOQ and lead times?
The minimum order quantity is 10 pcs. Samples take 4–8 weeks, and production orders take 4–8 weeks.