Product Overview
Microtech CR-40-5 Micro-Miniature Dual-Threaded Coaxial Pin - Legacy Subminiature RF Interconnect
Condition
Unused NOS. Evaluation: Visual inspection only. Function testing not performed. Brass body with gold-toned finish; golden-brown oxidation visible on body consistent with long-term storage. Recessed center bore intact. Part number CR-40-5 and patent nos. 3601766 and 3611273 confirmed from label. Sourced from a government research facility.
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Product Overview
Microtech CR-40-5 is a subminiature dual-threaded coaxial connector pin from Microtech, Inc. of Folcroft, PA - a manufacturer whose micro-miniature RF interconnect lines appear in NASA outgassing records, legacy aerospace instrumentation, and precision metrology hardware. The CR-40-5 is a cylindrical pin with dual external threads at each end, a central hexagonal wrenching section, and a recessed center bore. Approximate length: 5 mm as measured from product images. Brass body with gold-toned finish. This part belongs to the CR-series of Microtech subminiature coaxial connectors and is not interchangeable with standard commercial RF families such as SMA, SMB, SMC, MCX, or MMCX.
Key Features
- Dual-ended external threads for inline coaxial pin connection in micro-miniature housings
- Central hexagonal wrenching section for torque application without damaging threads or dielectric
- Recessed center bore at tip for coaxial signal continuity
- Brass body with gold-toned finish
- Approximate length: 5 mm
- Patent nos. 3601766 and 3611273 molded/labeled on packaging
- Part of Microtech CR-series subminiature coaxial line - incompatible with SMA, SMB, SMC, MCX, and MMCX families
Applications
- Aerospace and defense instrumentation technician replaces a damaged subminiature RF connection on a legacy avionics board or sensor interface, threading the CR-40-5 into the original housing to restore the coaxial signal path without redesigning the connector interface or breaking system certification
- Calibration lab engineer threads this pin into a vintage piezoelectric accelerometer housing to establish a secure, shielded coaxial connection for low-noise charge amplifier interfacing during high-vibration testing
- Biomedical technician rebuilding a legacy diagnostic transducer assembly replaces a worn or oxidized subminiature interconnect with this pin, preserving the shielded signal path in a physically restricted footprint where standard commercial connectors will not fit
- Metrology or telemetry restoration specialist sourcing exact-fit hardware to complete a legacy test rig or vintage instrumentation cable assembly
- Maker or electronics historian documenting or reverse-engineering vintage miniature RF interconnect systems who needs a physical reference specimen of Microtech's CR-series design
Frequently Asked Questions
Is this compatible with SMA, MMCX, or other standard RF connector families?
No. The CR-40-5 uses Microtech's proprietary subminiature thread pitch and is not compatible with SMA, SMB, SMC, MCX, MMCX, or any standard commercial RF connector family. It requires matching Microtech female receptacles or legacy sensor housings designed for the CR-series.
What is the exact thread pitch or size?
Thread pitch and size are not confirmed for this specific part. Microtech legacy connectors use highly specialized proprietary thread dimensions. Buyers who require exact thread specifications should verify against their existing mating hardware before installation.
What tools are required to install this connector?
Installation requires precision micro-wrenching tools sized to engage the central hexagonal section. Standard pliers or oversized tools risk stripping the threads or damaging the internal dielectric. Specialized subminiature hex wrenches are the appropriate tooling.
Is a mating female receptacle included?
Not included. This listing is for the CR-40-5 pin only.
What is the condition of the part?
Unused NOS. The part shows golden-brown oxidation on the body consistent with extended storage. The recessed center bore is intact and no physical damage is observed. Part number and patent markings are confirmed on the label.
Some parts spent decades in a government drawer waiting for exactly the repair they were made for. The CR-40-5 is one of those parts - still unused, still threaded, still ready to close the coaxial loop on a system that was built to last.
