M85049/38S-11N Backshell | MIL-DTL-85049 Strain Relief Connector Accessory
M85049/38S-11N Straight Self-Locking Strain Relief Clamp for D38999 Series III / IV Connectors
The M85049/38S-11N is a straight cable clamp backshell designed for circular electrical connectors. It is the AS85049 / GJB1784 standard part number, interchangeable with J1784/38S-11N, and is commonly used with GJB599 / D38999 Series III and Series IV connectors in shell size 11.
As an /38S-type accessory, the M85049/38S-11N provides self-locking coupling and mechanical strain relief without EMI shielding braid termination. Tightening the cable clamp helps retain the cable body and reduce pull-out stress on solder or crimp terminations in vibration-prone installations.
Product Features
- Conformant to national standard GJB1784 (equivalent to AS85049)
- Interchangeable with cross-reference part number J1784/38S-11N
- Straight strain relief clamp for compact cable routing and mechanical retention
- Self-locking coupling (S) for improved vibration resistance during installation and service
- Suitable for Series III / IV connectors where cable clamping without EMI banding is required
- Electroless nickel plating finish denoted by the N suffix
- Shell size 11 for D38999 / GJB599 Series III and IV circular connector interfaces
Technical Specifications - M85049/38S-11N
| Parameter | Value |
|---|---|
| Part Number | M85049/38S-11N |
| Equivalent Part Number | J1784/38S-11N |
| Accessory Type | M85049/38S straight self-locking strain relief clamp |
| Function | Straight cable clamp / strain relief (no EMI shielding braid termination) |
| Shell Size | 11 |
| Coupling Style | S - Self-locking |
| Finish | N - Electroless nickel plating |
| Connector Thread | M15 x 1 |
| Coupling Nut Diameter (mm) | 21.2 ~ 22.7 |
| Cable Entry (mm) | 3.9 ~ 5.9 |
| Compatible Connectors | GJB599 Series III & IV / D38999 Series III & IV |
Part Number Breakdown
| Segment | Meaning |
|---|---|
| M85049 | AS85049 / GJB1784 connector accessory series (interchangeable naming with J1784) |
| /38 | Straight strain relief cable clamp for Series III / IV connectors |
| S | Self-locking coupling (use dash form for non-self-locking / spin variants) |
| -11 | Shell size 11 |
| N | Electroless nickel finish |
Related options: M85049/38S-11W uses olive drab cadmium finish; the 90 degree counterpart is M85049/39S-11N. There is no functional difference between model prefixes marked "M85049" and related AS85049 designations.
Compatible Applications
The M85049/38S-11N straight strain relief clamp is intended for aerospace, avionics, and industrial platforms that use D38999 / GJB599 Series III / IV circular connectors and require straight cable exit with mechanical strain relief. Typical use cases include:
- Aircraft and helicopter wiring harnesses with limited rear clearance
- Avionics LRUs, radar, and communication equipment
- Ground vehicles and rugged electronic enclosures
- Shipboard and industrial connector assemblies
- High-vibration installs where self-locking coupling improves retention
Selection Guide
| Requirement | Recommended Accessory |
|---|---|
| Straight cable clamp, no shielding | M85049/38 (this product family) - M85049/38S-11N |
| 90 degree cable clamp, no shielding | M85049/39 series |
| EMI shielding / banding style | M85049/88, M85049/89, or M85049/90 series |
| Series I / II cable clamp equivalent | M85049/49 (straight) or M85049/47 (90 degree) |
Installation Notes
- Confirm shell size 11, self-locking style (S), and finish (N) before ordering.
- If clamp screws are used, apply thread-locking compound before final torque.
- Where required by the harness drawing, add anti-loosening methods such as safety wire, thread-locking compound, or full heat-shrink over the accessory.
- Verify connector series compatibility: /38S accessories are intended for Series III / IV interfaces, not Series I / II clamp styles.
- Strain-relief-only clamps such as M85049/38S-11N are best suited to clean, dry applications; for full environmental sealing plus EMI protection, select a shielded environmental backshell.
Why Choose M85049/38S-11N
Form-Fit-Function Compatibility
Choosing the M85049/38S-11N ensures form-fit-function compatibility with J1784/38S-11N supply chains while meeting GJB1784 / AS85049 requirements. The straight self-locking clamp geometry simplifies harness routing behind Series III / IV circular connectors, reduces strain on solder or crimp terminations, and supports reliable operation in aerospace and industrial interconnect systems.
Ordering Information
Order by the AS85049 designation M85049/38S-11N, or cross-reference as J1784/38S-11N, depending on your procurement standard. When requesting a quote, please confirm mating connector part number, cable outer diameter, and required quantity.
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