Sharman MB-700 adjustable mirror / bar bracket with 16mm hole for mount. This is a small mirror / bar bracket with a high degree of adjustability, it's very well made and very strong - a good bit of kit and a real bargain at £10 (originally much more!).
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2PCS/20PCS M10 Female To 3/8 24 Male Screw Mount Adapter Aluminium Alloy For V Antenna
Aliexpress UK
One NEW aluminum clamp on antenna mount with 3/8-24 stud. Accommodates 3/8-24 threaded antenna with lug coax connection.
eBay
Outdoor Waterproof Wideband Cellular Omni Directional 18dBi High Gain Wall Mount 2G/3G/4G/5G LTE/5G Antenna
Aliexpress UK
2008 - 2016 CLASSIC CASCADIA MIRROR BASE ANTENNA MOUNT. Lift Type Manual. Manufacturer Part Number PC-A50-02. ADJUSTABLE FORWARD ANGLE DESIGN REDUCES REFLECTIONS FROM THE CAB FOR OPTIMAL PERFORMANCE FROM ALL ANTENNA STYLES.
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9/11/16 Inch Car Roof Mount Mast Antenna Universal Stereo Radio FM AM Signal Aerial Amplified Antenna Mast Whip For VW Toyota
Aliexpress UK
Stud Antenna Mount for Cb & Ham Radio Antennas. For CB & Ham Radio Antennas. Stud Antenna Mount Adaptor. 3/8-24 Threaded Mount. We respond to all inquiries within 24 hours.
eBay
Double Antenna Mast Clamp V Jaw Block with U Bolts, Heavy Duty Mast to Mast Mount Bracket Kit for Outdoor Antenna 2 sets
Aliexpress UK
Keep the chatter flowing mile after mile with Moonraker's CB antenna kit starring the tough-as-nails Tornado Stinger Mini. Choose from a range of eye-catching colours to add a custom touch, then pick your ideal mount — magnetic, gutter, mirror or rail bracket — for maximum versatility no matter your vehicle.
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for xiaomi Yi Dash Cam Mirror Mount Sticeker for Yi Dash Cam Mount For Xiaomi YI DVR Holder mini bracket for car dvr mount cup
Aliexpress UK
Semi show in the picture is for reference only not included.
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25mm Mounts Mirror Seat Ball Head M10 M8 Screw Ball Head Mount Adapter M8 M10x1.25 Male Thread Mount for Motorcycle Phone Holder
Aliexpress UK
3-Way Mirror Mount Antenna Bracket for Vertical or Horizontal Mirror Arms, Rails 1/2 inch Hole for Stud Mounting Hardware Included Does Not Include Stud Firestik Model K-6.
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Second Generation Cellular 4G Module Fixed Clip Data Cable Antenna Mounts Bracket for DJI Mini 4pro Drone Accessories
Aliexpress UK
2008 - 2016 CLASSIC CASCADIA MIRROR BASE ANTENNA MOUNT. Lift Type Manual. Manufacturer Part Number PC-A50-02. ADJUSTABLE FORWARD ANGLE DESIGN REDUCES REFLECTIONS FROM THE CAB FOR OPTIMAL PERFORMANCE FROM ALL ANTENNA STYLES.
eBay
O4 pro universal antenna Mount Holder GPS module Fixed Bracket Seat 3D printed parts 20-30mm tail spacing for DJI O4pro UFL
Aliexpress UK