RP-SMA is a round screw-type connector, with medium-sized, threaded coupling connectors that are rated for frequencies from the lowest (DC) up to 18GHz.

This antenna cable adapter's range of frequency band compatibility (from 0 to 18GHz) and 50 Ohms impedance matching, makes them suitable and compliant for all the following applications:

• All WiFi standards: 2.4GHz and 5GHz applications:  802.11AC,  802.11N, 802.11G, 802.11B, 802.11A
• Cellular Wireless  LTE / 4G, GSM / 3G  WiMax:  Data and voice applications
• IoT wireless & M2M:  Bluetooth, ZigBee, RFID, LoRa, LTE-m, NB-IoT.

RP-SMA female diameter:

• RP-SMA female outside diameter is 5/16" (7.9375mm): Accommodates a hex nut (bulkhead nut) with 5/16" nominal outer diameter
• RP-SMA male inside diameter is 5/16" (7.9375mm) (the inside diameter where the threads are).
• RP-SMA-female requires a 6.5mm hole (if you are mounting it on a panel using a bulkhead
  

Adapter Composition: Our RP-SMA connectors are precision machined and gold-plated for low loss.

• Connector Body: Gold-Plated Brass. 
• Center Contact: Beryllium Copper, Gold Plated
• Crimp Ferrule: Copper, Nickel Plated
• Insulators: PTFE

GENDER DETERMINATION: Gender of RP-SMA is counter-intuitive in two ways: Please observe picture & note it is correct

• The gender is referring to the pins inside--not the threads. RP-SMA female has threads on outside.
• "RP" stands for reverse polarization: The pins are female when they appear to be male, and vice versa. 
• More details regarding RP-SMA gender determination.