Description
M85049/38S13W Backshell, D38999 SIII, SIV, Strain Relief Adapter, Olive Drab, Size 13 — BOLTON SKU 61705.
About the M85049/38S13W Circular Connector
The M85049/38S13W is a strain-relief backshell of the M85049/38 type, a specification sheet that supersedes MIL-C-85049/38. It threads onto the rear accessory thread of a circular connector and clamps the outgoing cable, so that pull and vibration are taken by the backshell rather than by the contacts and their terminations. Read against the manufacturer’s part-number structure of basic number, coupling style, shell size, then material and finish, the S is the coupling-style code for a self-locking coupling — N denotes non-detented and a dash denotes non-self-locking — 13 is the shell size, and W is the material and finish code for aluminium with an olive drab cadmium plating. Shell size 13 corresponds to shell size reference C, an M18 x 1 – 6H class 2B rear thread, and a cable clearance range of 0.190 in to 0.328 in (4.8 mm to 8.3 mm). The type is listed as compatible with MIL-DTL-38999 Series III and Series IV and EN3645 connectors.
Key specifications
| Type | Strain relief backshell, M85049/38 type |
|---|---|
| Specification sheet | M85049/38 (supersedes MIL-C-85049/38) |
| Compatible connectors | MIL-DTL-38999 Series III and Series IV, EN3645 |
| Coupling style | S — self-locking |
| Shell size | 13 (shell size reference C) |
| Rear thread | M18 x 1 – 6H, class 2B |
| Cable clearance | 0.190 in to 0.328 in (4.8 mm to 8.3 mm) |
| Material and finish | W — aluminium, olive drab cadmium |
Typical applications
Backshells to this sheet terminate D38999-style connectors in aerospace, defence and UAV harnesses, taking the load off the contacts where the bundle leaves the connector. A self-locking coupling is chosen for positions that see continuous vibration, where a plain coupling nut could work loose. Shell size 13 with its 4.8 to 8.3 mm clamp range covers the small and mid bundle diameters typical of avionics-bay wiring, ground-support cabling and MRO harness repairs.
Supplied by BOLTON Technical Equipment Supplies against request for quotation. Add this item to your RFQ basket to request pricing, lead time and documentation requirements (e.g. CoC, datasheets or test reports where applicable).
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