When sourcing circular connectors for industrial, defence, or railway applications, the MS 3106 connector remains one of the most specified components across engineering teams in India and globally. Whether you are a design engineer building a control panel or a purchase manager raising a procurement order, understanding the MS3106 data sheet, dimensions, and application fit is critical before you buy.
What Is the MS 3106 Connector?
The MS 3106 is a straight plug circular connector that conforms to the MIL-DTL-5015 military specification. It is part of the MS (Military Standard) connector family, widely used where reliable, ruggedised electrical connections are required in demanding environments.
The MS3106 is designed for cable-to-box or cable-to-cable applications and is available in a threaded coupling mechanism, making it highly resistant to vibration, shock, and accidental disconnection — a non-negotiable requirement in defence, aerospace, and heavy industrial settings.
MS3106 Key Specifications
| Parameter | Details |
| Series | MIL-DTL-5015 |
| Type | Straight Plug |
| Coupling | Threaded |
| Shell Material | Aluminium Alloy / Zinc Alloy |
| Finish | Cadmium or Nickel Plating |
| Insert Material | Neoprene / Glass-filled Nylon |
| Operating Temperature | -55°C to +125°C |
| IP Rating | IP67 (when mated) |
| Contact Types | Solder / Crimp |
| Shell Sizes Available | 8 to 48 |
MS3106 Dimensions — What to Check Before Specifying
MS3106 connectors are available across multiple shell sizes, with varying numbers of contacts and insert arrangements. The most commonly specified shell sizes in Indian industrial and defence procurement are Size 14, 18, 20, 22, 28, and 40, each offering different pin counts and current-carrying capacities.
When reviewing the MS 3106 datasheet, pay close attention to:
- Insert arrangement code — determines pin count and layout
- Contact size — affects current rating (size 16, 20, or 12 contacts)
- Shell size — determines the physical diameter and mating envelope
- Finish type — cadmium for standard environments, nickel for corrosion-sensitive applications
Errors in specifying any of these will result in a connector that physically fits but electrically underperforms, a costly error to correct post-installation.
Where Is the MS 3106 Connector Used?
The MS 3106 is a pillar connector specified across multiple sectors:
- Indian Railways — control panels, signalling systems, and traction equipment
- Defence & Aerospace — ground support equipment, communication systems, avionics interconnects
- Power Plants — instrumentation panels and high-vibration equipment enclosures
- Industrial Automation — control cabinets, motor drives, and machine wiring
Its MIL-spec pedigree makes it the preferred choice wherever field failure is not an option.
Sourcing MS 3106 Connectors in India
When evaluating an MS 3106 connector supplier in India, prioritise manufacturers who carry ERTL/LCSO certification, maintain an in-house quality testing lab, and offer the shortest lead times in the industry, especially for urgent or project-critical procurement.
Looking for a specific shell size or insert arrangement? Contact Jetronics India for a datasheet, dimensional drawing, or a custom interconnect solution tailored to your application.