https://www.microjpm.com/products/ad47548/
Shaft Coupler - 4mm to 5mm [625218] :: Micro JPM
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https://fluxelectronix.com/shop/12-7x12-7mm-xb-shaft-coupler-d30l35/
12.7x12.7mm XB Shaft Coupler D30L35 | Flux Electronix
12.7x12.7mm XB Shaft Coupler D30L35 Type: Aluminum Shaft Coupling Structure: Jaw / Spider Material: Aluminum / Plastic Dimensions Diameter: 30mm Length: 35mm...
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https://ddservicesverona.com/product/0208470-saltdogg-shaft-coupler-tgs05/
0208470 SaltDogg Shaft Coupler, TGS05 - Double D Services Inc.
Replacement Shaft Coupler - 1/2 to 5/8, SaltDogg TGS05 Salt Spreader
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https://hobbiesdirect.com.au/products/axial-wb8-hd-drive-shaft-coupler-set-ax31148-4017
Axial WB8-HD Drive Shaft Coupler Set
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