Product Overview
Malco Microdot 142-0000-0001 Ultra-Miniature LEPRA/CON Straight Plug - 50 Ohm, RG-178/U, Hex Nut, Gold-Plated Twist Pin, 3-Piece Set
Condition
Unused NOS. Three-piece connector set intact: hex coupling nut body, cylindrical ferrule, and center pin with splayed twist-pin tines. Gold plating shows no wear. Label on original manufacturer's packaging shows age-related spotting but contents are undamaged. Sourced from a government research facility. Evaluation: Visual inspection only. Function testing not performed.
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Product Overview
Malco Microdot 142-0000-0001 is an ultra-miniature LEPRA/CON RF coaxial straight plug for RG-178/U and RG-196/U coaxial cable. The connector mates to LEPRA/CON 141-series screw-on jacks via a .125-44 UNF-2B modified thread and .156-inch hex coupling nut. Impedance is 50 ohms. Frequency range is up to 2 GHz optimized, 6 GHz maximum. The beryllium copper twist-pin center contact is gold-plated, as is the brass body. Each set ships as three pieces: main body with hex nut, center contact pin, and crimp ferrule. TE Connectivity cross-references: 1466333-1, 3-1532145-3. NSN: 5935-00-856-7621. Military cross-reference: MSW-CX544-HX.
Key Features
- Part number: Malco Microdot 142-0000-0001 (TE Connectivity 1466333-1 / 3-1532145-3)
- Connector family: LEPRA/CON ultra-miniature RF coaxial, straight plug configuration
- Coupling: .125-44 UNF-2B modified thread, .156-inch hex nut (distinguishes from knurled -0002 and safety-wire -0003 variants)
- Impedance: 50 ohms
- Frequency range: up to 2 GHz optimized, 6 GHz maximum
- Center contact: beryllium copper twist-pin, gold-plated - seven self-wiping spring surfaces
- Body material: brass with gold plating
- Compatible cables: RG-178/U and RG-196/U coaxial
- 3-piece set: connector body with hex coupling nut, center contact pin, cylindrical crimp ferrule
- NSN 5935-00-856-7621 / Military cross-reference MSW-CX544-HX
- Assembly per TE Connectivity instruction sheet 408-8510 (RF-ASMB-12)
Applications
- Avionics repair technician strips RG-178/U cable to precision dimensions, solders the twist-pin contact, and crimps the ferrule to restore an ultra-miniature RF connection on a high-vibration aircraft chassis or radar sub-assembly
- Military cable fabricator builds RG-178/U jumpers to NSN 5935-00-856-7621 spec, verifying the hex-nut variant against the bill of materials before the assembly reaches quality audit
- Cryogenic instrumentation engineer routes fine coaxial lines inside a cryostat, assembling these gold-plated plugs onto cables running to a PCB on a low-temperature copper shield through repeated thermal cycling
- Quantum computing or physics lab technician connects RF signal lines inside a vacuum chamber or ion trap apparatus where the small form factor and threaded lock prevent accidental disconnection under vibration
- Experimental builder or RF hobbyist working with surplus military coax builds custom ultra-miniature jumpers for bench test setups or retrofits obsolete defense hardware
Frequently Asked Questions
Are all three pieces included - the body, the center pin, and the ferrule?
Yes. This is a complete 3-piece set: the main connector body with .156-inch hex coupling nut, the beryllium copper gold-plated twist-pin center contact, and the cylindrical crimp ferrule. All three are required for assembly.
What jack or receptacle does this mate with?
This plug mates with LEPRA/CON 141-series screw-on jacks and receptacles using the .125-44 UNF-2B modified thread. It is not compatible with SMA, SMB, or SMC jacks.
What cables will this terminate?
RG-178/U and RG-196/U coaxial cable. The ferrule and body entry dimensions are sized for these cables only. RG-58, RG-316, and other larger-diameter coax will not fit.
What tools are required for assembly?
Assembly requires a micro-stripping tool to prep the cable jacket, shield, and dielectric to precise dimensions, a soldering iron for the center contact pin, and a calibrated micro-crimp tool for the ferrule. Assembly instructions are covered by TE Connectivity sheet 408-8510 (RF-ASMB-12).
Is this the hex-nut version or the knurled version?
This is part number 142-0000-0001 - the .156-inch hex nut version. The knurled coupling nut is 142-0000-0002. The hex nut with safety wire holes is 142-0000-0003.
These connectors spent decades in government storage and came out with their gold plating intact and every piece present. Somewhere there is a cryostat, a radar chassis, or a bench-built jumper waiting for exactly this size thread - and now it has what it needs.
