The **FPK-R** refers to a specific series of high-reliability, miniature circular connectors, typically manufactured by companies like **ITT Cannon** (under the MIL-DTL-83723 standard). These components are engineered for aerospace and defense environments where vibration, moisture, and extreme temperatures are prevalent. --- ### 1. Technical Specifications The electronics within the FPK-R series are designed to provide stable signal and power transmission. | Feature | Specification Details | | :--- | :--- | | **Standard** | Based on MIL-DTL-83723 Series III | | **Coupling Mechanism** | Threaded coupling for secure connection | | **Operating Temp** | -65°C to +200°C (-85°F to +392°F) | | **Contact Plating** | Gold over nickel for high conductivity | | **Shell Material** | Passivated Stainless Steel (R-Type) | | **Seal Type** | Moisture resistant with fluorosilicone elastomers | --- ### 2. Key Electronic Components The FPK-R connector is an assembly of several critical parts that ensure electrical integrity: * **Contacts (Pins and Sockets):** These are the conductive elements. They are typically **crimp-terminated**, allowing for high-strength mechanical bonding to the wire. * **Inserts:** High-grade dielectric material (often thermosetting plastic) that holds the contacts in place and prevents electrical arcing between pins. * **Interfacial Seal:** A rubberized gasket on the face of the connector that prevents moisture, dust, and jet fuel from entering the contact area when mated. * **Grommet:** Located at the rear of the connector, it provides strain relief for the wires and prevents fluid ingress from the back end. --- ### 3. Common Applications Due to their ruggedized nature, these electronic parts are used in: 1. **Aviation Engines:** High-temperature zones near turbines. 2. **Missile Systems:** High-vibration environments during launch. 3. **Space Exploration:** Vacuum and extreme thermal cycling environments. 4. **Military Communications:** Field equipment requiring "quick-disconnect" yet secure threading. --- ### 4. Part Number Breakdown (Example) An FPK-R part number usually follows a specific nomenclature: ```text Example: FPK-R-1112-40PD [FPK] - Series Prefix [R] - Stainless Steel Shell (Corrosion Resistant) [11] - Shell Size [12] - Contact Arrangement (Number of pins) [40] - Modification code [P] - Contact Style (P = Pin, S = Socket) [D] - Polarization/Keying Position ```