M8 is suitable for panels up to 4mm thick and can be fitted from internally or externally.
eBay
304 U Bolts Heavy Duty Anti-Rust Mast to Mast Mount Bracket Kit for TV,CB,Ham Double Antenna Mast Clamp V Jaw Block with
Aliexpress UK
SIRIO KF GUTTER MOUNT. SIRIO KF-GUTTER MOUNT FOR 3/8" STUD FITTING ANTENNA. Weight (approx): 280 gr / 0.62 lb.
eBay
Bingfu Heavy-Duty Stainless Steel Double Antenna Mount Bracket Kit with V-Jaw Blocks,Anti-Rust Mast Clamp for Outdoor TV/CB/Ham
Aliexpress UK
Fitting: SO239 socket. Aluminium right angle mirror mount. Connection: PL259 plug fitted.
eBay
Antenna Mast Clamp Bracket Antenna Mount Clamp U-Bolt For Helium Miner Antenna Pipe Connection Assembly for Outdoor Yagi Antenna
Aliexpress UK
Lightweight bright stainless steel hatchback mount. Fully adjustable.
eBay
Front Mount Antenna Rack Mount Kit for SLX SLX2 LX4 PGX2 Wireless System 1U Panel 50cm BNC Cable Antenna Rack Mount Kit
Aliexpress UK
This mount converts an SO-239 (which takes a standard PL259) to a 3/8 aerial thread. We will always help you to have a 100% positive happy buying experience.
eBay
CB-40M Citizen Band Radio AM/FM Mini Mobile CB Radio AR-925 25.615--30.105MHz 8W Amateur Car Radio Station + Mag-1345 Antenna
Aliexpress UK
MIRROR RAIL DOUBLE GROOVE MOUNT 3/8TH FITTING SO 239 CONNECTION. Suitable for 13mm to 30mm bars.
eBay
Pack Of 2 CB Radio Antenna Cable 50Cm PL259 UHF Male To Male RG58 Coaxial Patch Lead For Amateur Ham Radio CB Marine
Aliexpress UK
Gutter Mount is designed to be fitted to any vehicle with any roof gutter. Due to it’s High Quality Cast Iron construction.
eBay
27MHZ CB Radio Antenna BNC Male PL259 forfor IC-V8 TK100 HT440 HT90 CB Walkie Talkie Midland/Uniden/Midlan
Aliexpress UK
MIRROR RAIL SINGLE GROOVE MOUNT 3/8TH FITTING SO 239 CONNECTION. Suitable for 7mm to 25mm bars.
eBay
27MHZ CB Radio Antenna BNC Male PL259 forfor IC-V8 TK100 HT440 HT90 CB Walkie Talkie Midland/Uniden/Midlan
Aliexpress UK