Kuryakyn has the adapters on their website. I think the newbonneville website just resold the Kuryakyn.
 
oepfp4901637_04ff508ac2625c88a0b4844952a3335fc6312f06.jpg

KURYAKYN
Stainless Steel Mirror Mounting Adapters - 1811

https://www.denniskirk.com/kuryakyn...j5gIViIbACh20mgQTEAQYBSABEgKcePD_BwE#rev-cont
MSRP: $19.99

Price:$17.99

Kuryakyn Stainless Steel Mirror Mounting Adapters - 1811
  • Specifically for mounting Kuryakyn mirrors on many Triumph models; re-using some of the factory hardware
  • Stainless steel construction
  • Sold in pairs
  • Thread Dimensions: M6-1.00 internal female to 5/16"-18 male
and these black ones are on close out


doesn't give me thread information but the only difference is the 5/16x18UNC or a 8mm 1.5mm pitch can fit each other with a tap :)

P/N Description & Fitment UOM Price
1894
Mirror Adapters for Triumph, Black
Triumph: '02-'16 America, America LT, '01-'19 Bonneville (Except SE), Bonneville T100/T120, '04-'19 Rocket III, Rocket III Touring, '03-'19 Speedmaster
PR
CLOSEOUT:
$10.00

Orig.$10.00
 
@warp9.9 those look like exactly what I am looking for. I misunderstood what the Kuryakyn adapters actually were. I don’t have those, but now I know what to look for. Thanks for the lead. As it is, new Bonneville is not selling the mirror adapters. Or at least the custom ones they did with the vibration damping O-ring.
 
oepfp4901637_04ff508ac2625c88a0b4844952a3335fc6312f06.jpg

KURYAKYN
Stainless Steel Mirror Mounting Adapters - 1811

MSRP: $19.99

Price:$17.99

Kuryakyn Stainless Steel Mirror Mounting Adapters - 1811
  • Specifically for mounting Kuryakyn mirrors on many Triumph models; re-using some of the factory hardware
  • Stainless steel construction
  • Sold in pairs
  • Thread Dimensions: M6-1.00 internal female to 5/16"-18 male
and these black ones are on close out
21620_1350x900_RGB_72DPI.jpg


doesn't give me thread information but the only difference is the 5/16x18UNC or a 8mm 1.5mm pitch can fit each other with a tap :)

P/N Description & Fitment UOM Price
1894
Mirror Adapters for Triumph, Black
Triumph: '02-'16 America, America LT, '01-'19 Bonneville (Except SE), Bonneville T100/T120, '04-'19 Rocket III, Rocket III Touring, '03-'19 Speedmaster
PR
CLOSEOUT:
$10.00

Orig.$10.00

Hey, Buddy!
Are you stating a 5/16-18" tap can be run through the 8x1.5mm and successfully change the thread?
 
Hey, Buddy!
Are you stating a 5/16-18" tap can be run through the 8x1.5mm and successfully change the thread?
Well yes the pitch is so close it can be altered. The pitch on the 5/16" thread is .05555" and the 1.5mm pitch converted to english is .0590" about .00349" difference . No outside diameters 5/16 = .3125, 8mm = .3149" bet you if i calculated pitch diameters they would be darn close.
 
If anyone has those Kuryakyn stainless adaptors, can you measure the total length, thread length, length of the lower half and the diameter at the widest section? I am trying to get the mirror on the front brake side to get above the rounded portion on the reservoir The picture below shows a nylon spacer I am currently using.

36918E9A-020E-4875-8734-A8D889678910.jpeg E52D87D3-A4B0-43F3-97BF-A03E7E3F74A0.jpeg D1EC8344-5EA5-4558-88AB-B7EF0B4BDC25.jpeg 697E13B9-DC57-4E6F-8DA8-D912DE8E2165.jpeg 12DCEDFA-C924-43AB-BA7E-9AEBDBC71BB1.jpeg D55B9EB4-C525-40CE-8236-6DD6015A74E6.jpeg
 
Well yes the pitch is so close it can be altered. The pitch on the 5/16" thread is .05555" and the 1.5mm pitch converted to english is .0590" about .00349" difference . No outside diameters 5/16 = .3125, 8mm = .3149" bet you if i calculated pitch diameters they would be darn close.

Good to know, gratitude!
 
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