J599/24 Jam-Nut Receptacles, D38999/24-Type
The J599/24 mounts through a single round panel hole and is clamped by a jam nut, for panels where a flange and screw pattern do not fit.
- Mounting
- Jam nut, single-hole
- Operating temperature
- −65 to +200 °C (260 °C with MT class)
- Salt spray
- 48 to 2000 h, by finish
- EMI shielding
- Up to ≥ 65 dB at 10 GHz, ≥ 85 dB at 1 GHz, by finish
J599/24 is the jam-nut receptacle in our J599 Series III range, built to GJB 599B Series III. It passes through one round hole in the panel and is clamped from the rear by a nut, so the panel needs no separate fixing holes. It mates with the J599/26 plug through the same triple-start threaded coupling as the flange receptacle.
The jam-nut receptacle uses the same crimp contacts, insert arrangements and finish codes as the J599/20. That lets you change mounting style without changing the contact layout or the mating plug. With C contacts, the jam-nut shell is also the base of the J599/24…C hermetic feed-through receptacle.
When to choose this style
- Panel space is tight, or a round hole is simpler to machine than a flange cut-out with fixing holes.
- The receptacle goes into a curved, thin or enclosed wall that you can reach from the rear to tighten the nut.
- You want a through-panel receptacle without exposed flange screws on the front face.
- The receptacle sits near a hot zone: the MT class (stainless steel only) runs to 260 °C.
- The panel is exposed to fuel or oil: add fluorosilicone seals (V); V is not available with MT.
Ordering example
J599/24SG41SN
| Segment | Code | Meaning |
|---|---|---|
| Type | 24 | Jam-nut receptacle |
| Class | (none) | Standard |
| Finish | S | Stainless steel, nickel |
| Shell | G | Shell size 21 |
| Arrangement | 41 | Layout 21-41: 41 × size 20 contacts |
| Contact | S | Socket (crimp) |
| Key | N | Normal key position |
Finish S: shell-to-shell conductivity 1 mΩ, ≥ 65 dB at 10 GHz and ≥ 85 dB at 1 GHz, −65 to +200 °C, 48 h salt spray. For long salt-spray exposure on the same panel, composite M (2000 h) or J (2000 h) is the alternative.
High-temperature variant: insert MT in the class position with a stainless-steel finish (K or S). Fluorosilicone seals: suffix V (not with MT).
Dimensions (mm)
| Shell sizes | Code | A | Bmax | Cmax | D | E | F | G |
|---|---|---|---|---|---|---|---|---|
| 9 | A | 27 | 23.4 | 16.53 | M12×1-6g | 15.84 | 2.5 | 30.2 |
| 11 | B | 31.8 | 26.8 | 19.07 | M15×1-6g | 19.01 | 2.5 | 34.9 |
| 13 | C | 34.9 | 30.7 | 23.82 | M18×1-6g | 22.19 | 2.5 | 38.1 |
| 15 | D | 38.1 | 33.8 | 26.97 | M22×1-6g | 25.36 | 2.5 | 41.3 |
| 17 | E | 41.3 | 36.5 | 30.15 | M25×1-6g | 30.11 | 2.5 | 44.5 |
| 19 | F | 46 | 40.6 | 33.32 | M28×1-6g | 31.69 | 3.3 | 49.2 |
| 21 | G | 49.2 | 43.4 | 36.5 | M31×1-6g | 34.87 | 3.3 | 52.4 |
| 23 | H | 52.4 | 46.2 | 39.67 | M34×1-6g | 38.04 | 3.3 | 55.6 |
| 25 | J | 55.6 | 49.7 | 42.85 | M37×1-6g | 41.22 | 3.3 | 58.7 |
| Shell sizes | Code | A | Bmax | Cmax | D | E | F | G |
|---|---|---|---|---|---|---|---|---|
| 9 | A | 27 | 23.4 | 16.53 | M12×1-6g | 15.88 | 2.5 | 30.2 |
| 11 | B | 31.8 | 26.8 | 19.07 | M15×1-6g | 18.9 | 2.5 | 34.9 |
| 13 | C | 34.9 | 30.7 | 23.82 | M18×1-6g | 22.23 | 2.5 | 38.1 |
| 15 | D | 38.1 | 33.8 | 26.97 | M22×1-6g | 25.4 | 2.5 | 41.3 |
| 17 | E | 41.3 | 36.5 | 30.15 | M25×1-6g | 30.16 | 3.3 | 44.5 |
| 19 | F | 46 | 40.6 | 33.32 | M28×1-6g | 31.75 | 3.3 | 49.2 |
| 21 | G | 49.2 | 43.4 | 36.5 | M31×1-6g | 34.9 | 3.3 | 52.4 |
| 23 | H | 52.4 | 46.2 | 39.67 | M34×1-6g | 38.1 | 3.3 | 55.6 |
| 25 | J | 55.6 | 49.7 | 42.85 | M37×1-6g | 41.28 | 3.3 | 58.7 |
Panel cut-out (mm)
| Shell sizes | Code | E | F |
|---|---|---|---|
| 9 | A | 17.78 | 17.02 |
| 11 | B | 20.96 | 19.59 |
| 13 | C | 25.65 | 24.26 |
| 15 | D | 28.83 | 27.56 |
| 17 | E | 32.01 | 30.73 |
| 19 | F | 35.18 | 33.91 |
| 21 | G | 38.35 | 37.08 |
| 23 | H | 41.53 | 40.26 |
| 25 | J | 44.70 | 43.43 |
Frequently asked questions
Do you make D38999/24 receptacles?
We make the J599/24, a D38999/24-Type jam-nut receptacle built to GJB 599B Series III. Send us your D38999 part number; we will propose the matching configuration and samples for your own mating test.
Jam nut or square flange: which should I use?
Use the jam-nut J599/24 when you want a single round panel hole and can reach the rear of the panel. Use the square-flange J599/20 when you want the receptacle screwed to the front of the panel. Both take the same J599/26 plug and the same insert arrangements.
Can the jam-nut receptacle run at high temperature?
Yes. The standard range is −65 to +200 °C (−65 to +175 °C for cadmium and T finishes). The MT class, in stainless steel only, runs to 260 °C.
How do I seal a jam-nut receptacle that must hold pressure?
Use the hermetic jam-nut receptacle J599/23, with solder-sealed pin contacts and a leak rate ≤ 1 × 10⁻⁸ Pa·m³/s at 0.1 MPa pressure differential.
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.