Quick Answer / Summary: An N male connector (Type N male plug) is the male cable-end component of the N-type coaxial family. Featuring internal 5/8-24 UNEF threads within a rotating outer coupling collar, a 1.65mm (50-ohm) solid center contact pin, and an internal elastomeric sealing gasket, it inserts into female N jacks on antennas, amplifiers, and test equipment.
In outdoor wireless networking, commercial cell tower installation, and RF transmitter testing, terminating coaxial feeder cables with precision plugs is essential for maintaining microwave signal continuity. Specifying a factory-certified n male connector—featuring a precision 5/8-24 threaded rotating coupling nut, gold-plated 1.65mm center pin, and internal silicone gasket—ensures water-sealed IP67 environmental isolation and high-frequency return loss.
Electro-Mechanical Anatomy of the N Male Plug
Analyzing the physical components of the N male interface: 1. Rotating Threaded Coupling Nut (5/8-24 UNEF): The outer knurled or hexagonal collar rotates freely around the inner connector body, allowing technicians to torque the connection without twisting the attached coaxial cable; 2. 50-Ohm Solid Center Pin (1.65mm Diameter): Machined from brass or tellurium copper and plated with 30 micro-inches of hard gold over nickel. The chamfered pin tip glides into female socket fingers with minimal insertion friction; 3. Internal Silicone Weatherproofing O-Ring: Positioned inside the coupling collar, the O-ring is compressed against the smooth outer mating sleeve of the female jack when torqued to 12-15 in-lbs, creating a hermetic seal against wind-driven rain and humidity; 4. Outer Ground Shell Contact Plane: The male outer contact features a ground plane that makes 360-degree contact with the female housing, maintaining continuous shielding (>100 dB isolation).
Hex Nut vs. Knurled Nut Configurations
Commercial N male plugs feature a 3/4-inch hex nut allowing precision calibrated torque wrench tightening on cell towers; knurled versions allow quick hand-tightening on indoor lab test benches.
Captive vs. Solder Center Pin Alignment
Captive contact pins are pre-assembled inside the connector insulator to ensure exact pin recession depth; non-captive pins are crimped or soldered onto the cable core before inserting into the connector.
Cable Termination on LMR-400 and RG213
N male connectors crimp onto 0.405″ cables using a heavy 0.429″ hex crimp ferrule, providing over 40 lbs of mechanical pull-off retention strength to withstand tower wind-sway.
N Male Connector Specifications by Construction Style
| Specification Parameter | Straight Hex-Crimp N Male | Right-Angle N Male | Clamp / Solder N Male (MIL-Spec) |
|---|---|---|---|
| Coupling Style | 3/4″ Hex Nut (5/8-24 UNEF) | 3/4″ Hex Nut (5/8-24 UNEF) | Knurled / Hex Combination Nut |
| Frequency Rating | DC to 6 GHz / 11 GHz | DC to 6 GHz (Mitered body) | DC to 11 GHz |
| Insertion Loss | < 0.1 dB @ 3 GHz | < 0.18 dB @ 3 GHz | < 0.12 dB @ 3 GHz |
| Recommended Torque | 12 to 15 in-lbs (1.4 – 1.7 N·m) | 12 to 15 in-lbs | 12 to 15 in-lbs |
| Primary Setting | Tower jumper cables & antennas | Tight antenna enclosures & DAS | Field repairs & military marine gear |
Real-World Application Scenarios
Terminating LMR-400 antenna jumpers for commercial Wi-Fi access points, cellular amplifier output cables, marine VHF antenna feeds, and laboratory RF signal generator outputs.
Recommended Internal Resources
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Frequently Asked Questions (FAQ)
Q: How tight should an N male connector be tightened?
A: Tighten an N male connector using a 3/4-inch calibrated torque wrench to 12 to 15 in-lbs (1.35 to 1.70 N·m); hand-tightening can leave the O-ring unsealed and allow moisture ingress, while over-tightening with pliers strips threads.
Q: Can I plug an N male connector directly into a spectrum analyzer?
A: Yes; most laboratory spectrum analyzers and RF power meters feature precision N female input ports designed to receive standard 50-ohm N male plugs.