There is a great variety of connectors depending on the radio type or intercom, as far as, we are going to enumerate the most utilized in this section..
Next we have a brief description accompanied by a picture for their clear identification when making your order:

CONNECTORS for aeronautical band radios

Jack 6,3+5,2 (Airband): 6.3 mm. and 5.2 mm. stereo double jack. Used in Civil Aviation intercoms and any airband radio with the corresponding adaptor.

Icom VXA (Threaded 3.5 mm. jack with four pins): Used to waterproof walkies, with different connections depending on the model of radio.

Vertex Pilot (Airband Transceiver): VXA-220, VXA-300, VXA-710

Jack 6,3: This connection is used by ours INTERNAC intercoms and others radios with intercom incorporated, like MICROAIR.

Some airplane manufacturers uses this 6.3 mm. jack, but connections may have invested.

CONNECTORS for 2 mt band radios

Standard: Double jack mono 2.5 mm. and 3.5 mm. Utilized in the most FM walkies (2 meters) and many PMR/FRS (free use). Recommended for walkies with connection in the top side.

Examples:

ADI: Sender
Alan: CT180, G6, G7 X-TRATALK, G12, 456, HP450
Alinco
GME TX6000, TX7000
ICOM Series: F3, F3S, F4, F4S, F4SR, F4TR, F10, F20, H2, H6, J12, M5, T2A/T2H, T7A/T7H,T22A, T81A, T90A, U12, U16, V8, W32A, 4088A, 40, 40S
Maxon: SL25, SL55, SL70, SP100, SP120, SP130, SP140, SP5000, PL1145, PL2215, PL2415, PL2245, PL2445, SP200, SP200K, SP210, SL100 and Legacy Series-, PL2245P, PL51
Maycom MH446
Midland Series:75-501, 75-510, 75-785, 75-786, 75-810, 75-820, 72-822;
Cobra FRS90,FRS100, FRS105, FRS110, FRS115, FRS120, FRS130, FRS220, FRS225, FRS235,FRS250, FRS250, FRS300, FRS305MA, FRS307, FRS310WX, PR330, PR500,PR880, PR900, PR945, PR950DX, PR955DX, PR1000, PR1050WX, PR1100WX,PR2000, HH37ST, HH45WX, HH45WX, MT-500, MT-700, MT-900
Motorola Talkabout Series: Basic, Plus, 200, 250, Distance, Distance DPS (no apto para 270/280/289 o T Series)
Multicom Pro
Panasonic KX-TR320
Rexon
Ritron: Patriots Series RTX, SST, Jobcom, JMX, MBX, JMX-141, JMX-146, JMX-144, JMX-441, JMX-446, JMX-444, JMX-102, JMX-152, JMX-452, Patriot SST plus
Standard: HX24,HX32, HX482, HX581, HX583
SPC TELECOM: 0104, 0107, 0112, 0113, 0114
Uniden UH040, UH-042, UH-052
Vertex: VX200,VX500, VX510

Motorola: Double jack mono 2.5 & 3.5 mm. specific to Motorola radios and any other models.

Examples Motorola

CLS Series: CLS1110, CLS1410, CLS1413, CLS1450, CLS1450C
CP Series: CP88, CP100, CP125, CP150, CP200, CP250 VHF/UHF
CT Series: CT150, CT250, CT450, CT450LS
GP Series: GP2000, GP2100, GP300, GP308, GP68, GP88, GP88S

Motorola VHF/ UHF Spirit, Spirit Pro, Spirit Pro+
Motorola Spirit Series: SV10, SV11, SV11D, SV21, SV12, SV22, SV22C, SU210, SU22,SU22C, SU220
Spirit M Series: MV11, MV11CV, MV12, MV12CV, MV21C, MV21CV, MV22, MV22CV, MU11,MU11C, MU11CV, MU12, MU12C, MU12CV, MU21C, MU21CV, MU22CVS, MU24CV,MU24CVS, MU24CVST
SP Series: SP10, SP21, SP50, SP50+
P Series: P040, P080, P110, P1225
PRO Series: PRO1150, PRO2150, PRO3150
XTN Series: XTN446, XTN500, XTN600
XTN XV Series: XV1100 XV2100 XV2600
XTN XU Series: XU1100 XU2100 XU2600

XTN AX Series: AXV5100, AXU4100
Other Series: GTI, GTX, LTS2000, VL50, VL130, PMR446, ECP100, PR400, EP450, BPR40 MagOne

Talkabout: 2.5 mm. jack longer than standard one. Specific for Motorola Talkabout PMR radios.

Motorola Spirit GT, Spirit GT+
Motorola Talkabout 270, 280, 289
Motorola Talkabout T Series: T270, T280, T289, T4500, T4800, T4900, T5000, T5100, T5146, T5200, T5300, T5320, T5400, T5410, T5412, T5420, T5500, T5500, T5512, T5522, T5532, T5550, T5600, T5620, T5700, T5710, T5720, T5725, T5800, T5820, T5900, T5920, T5950, T6200, T6210, T6220, T6222, T6250, T6300, T6310, T6320, T6400, T6500, T6510, T6550, T7000, T7100, T7150, T7200, T7400, T7450
Motorola F Series: FR50, F60, FV200R, FV200 FV200AA, FV500R, FV500, FV500AA
Motorola SX700, SX700R, XTL446

Icom VX: 3.5mm 90 angled jack. For example:

Yaesu FT-50, FT-60, FT-250R

Yaesu/Vertex Standard VX F-1, VX-1, VX-2R, VX-5R, VX-10, VX-110, VX-150, VX-300, VX410, VX-420

Kenwood: Double 2.5 mm. & 3.5 mm. jack angled 90. Exclusive to Kenwood walkies, and compatibles.

Kenwood: TH-D7AG, TH-F6A, TH-G71A, TH-K21A, TK-208, TK-2100(ProTalk), TK-2102(ProPower), TK-2130 (ProTalk XLS), 2170, TK-220, TK-240, TK-240D, TK-248 TK-250, TK-260, TK-260G, TK-270, TK-270G, TK-308, TK-3100(ProTalk), TK-3101(FreeTalk XL), TK-3102(ProPower), TK-3130(ProTalk XLS, TK3131(FreeTalkXLS), TK 3170, TK3202, TK-320, TK-340, TK-340D, TK-348, TK-350, TK-353, TK-360, TK-360G, TK-370, TK-370G, TK-372G, TK-430, TK-431, TK-3200

ADI: AF16-46

Alan: CT200-400, CT210-410

KIRISUN

PUXING: PX-777, PX-666, PX-328

QUANSHENG: TG-K4AT, TG-2AT, TG-45AT, TG-42AT, TG-22AT, TG-25AT

Linton: LT-2288, LT-3288, LT-6288, LT-5288, LT-3188, LT-2188, LT-3260, LT-2268, LT-3268 , LT6188,LT3288...

WEIERWEI: VEV-3288S,VEV-6288, VEV-3288

Cobra (Standard 2.5 mm. jack angled 90): Normally used with PMR COBRA radios. Used with walkies with built-in GPS, like Garmin Rino and other PMR or FSR radios.

Cobra PR / Mircotalk Series: PR240, PR245, PR237, PR240, PR245, PR350, PR375, PR385, PR550, PR590, PR3000, PR3100, PR3175, PR3180, PR3500, PR3550, PR3575, PR4000, PR4200, PR4250, PR4300, PR4700, PR4750, PR5000-2
Cobra FRS Series: FRS132, FRS237
Cobra MRHH Series: MRHH100, MRHH200

Garmin Rino Series: 110, 120, 130, 520, 530

Threaded 3.5 mm. jack with four pins) Used to waterproof walkies, with different connections depending on the model of radio.

Yaesu/ Vertex Standard: VX-5R, VX-6R, VX-7R, VX-120, VX-170, FT-270R

ICOM: IC-M31, IC-M33, IC-M34 (Marine Transceiver)