A range of circular connector backshells to suit MIL-DTL-38999 Series III and IV connectors.
| A37-524
A37-525 A37-526 |
4 | J | 08 | KN | ||
|---|---|---|---|---|---|---|
| Basic part number | ||||||
| Shell size code |
ARefer to table A for the required Shell Size code
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| Material and plating code |
CRefer to table C for the required Shell Finish code
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| Cable entry size |
BRefer to table B for the required Shell Entry Size code
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| Option knurled coupling ring |
* Please refer to datasheets for all other backshell types.
All dimensions in mm (inch) unless specified otherwise.
| Shell Size | Shell Size Code |
|---|---|
| 09 (A) | 1 |
| 11 (B) | 2 |
| 13 (C) | 3 |
| 15 (D) | 4 |
| 17 (E) | 5 |
| 19 (F) | 6 |
| 21 (G) | 7 |
| 23 (H) | 8 |
| 25 (J) | 9 |
| Entry Size Code | ØD2 min. | ØD3 max. |
|---|---|---|
| 03 | 4.7 (0.185) | 13.9 (0.547) |
| 04 | 6.3 (0.248) | 13.9 (0.547) |
| 05 | 7.9 (0.311) | 15.5 (0.610) |
| 06 | 9.5 (0.374) | 17.2 (0.677) |
| 07 | 11.1 (0.437) | 18.7 (0.736) |
| 08 | 12.7 (0.500) | 20.3 (0.799) |
| 09 | 14.2 (0.559) | 21.9 (0.862) |
| 10 | 15.8 (0.622) | 23.5 (0.925) |
| 11 | 17.4 (0.685) | 25.1 (0.988) |
| 12 | 19.0 (0.748) | 26.7 (1.051) |
| 13 | 20.6 (0.8115) | 25.1 (0.988) | 14 | 22.2 (0.874) | 29.9 (1.177) |
| 15 | 23.8 (0.937) | 31.5 (1.240) |
| 16 | 25.4 (1.000) | 33.1 (1.303) |
| 17 | 27.0 (1.063) | 34.7 (1.366) |
| 18 | 28.6 (1.126) | 36.3 (1.429) |
| 19 | 30.2 (1.189) | 37.9 (1.492) |
| 20 | 31.8 (1.252) | 39.5 (1.555) |
| 21 | 33.3 (1.311) | 41.1 (1.618) |
| 22 | 35.0 (1.378) | 42.7 (1.681) |
| 23 | 36.5 (1.437) | 44.3 (1.744) |
| 24 | 38.1 (1.500) | 45.9 (1.807) |
| Material & Plating Code | Technical Design | ROHS / REACH Complaint | Electrically Conductive | Salt Spray Resistance (MIL Spec) | Salt Spray Resistance (VG Spec) |
|---|---|---|---|---|---|
| J | Black Hybrid finish
|
Yes | Yes | 500 hrs | 5 days cyclic |
| U | Olive drab Hybrid finish Coupling ring: Al- alloy, olive drab anodized. Shell: Electroless nickel plating, exposed area is selective olive drab coated. Screen termination system has a very good electrical conductivity (electroless nickel). All visible parts are olive drab coloured in assembled condition. Version *U* is intermateable with Cadmium-, Nickel, Zinc-Nickel-, and Zinc-Cobalt plated connectors. |
Yes | Yes | 500 hrs | 5 days cyclic |
| 5 | Electroless nickel Base material: Al- alloy. |
Yes | Yes | 48 hrs | 48 hrs |
| 2 | Zinc-Nickel black Coupling ring: Al- alloy, black anodized. Shell: Zinc-Nickel black chromate over electroless nickel. |
Yes | Yes | 500 hrs | n.a. |
| 6 | Cadmium olive drab Coupling ring: Al- alloy, olive drab anodized. Shell: Al- alloy cadmium plated olive drab over electroless nickel. |
No | Yes | 500 hrs | 5 days cyclic |
| 9 | Marine Bronze Material: CuAl10Ni5Fe4 (CW307G). No additional plating. |
Yes | Yes | n.a. | n.a. |
| 1 | Stainless Steel / passivated |
Yes | Yes | n.a. | n.a. |
