Telescope Nut to Attach Spider Vane

[ha421]

I need 3 thumb nuts for Bintel 8" dob spider vanes. Will appreciate info if they can be sourced locally.
Thanks

[mura_gadi]

Hello,

If you find the thread type and length you can pretty much customise your nut set. Take the hex bolt out and measure the depth and work out the M number (M = width of the bolt in mm) and fine or coarse thread.

Get a pack of the same M thread bolts from Bunning's and use the headsets from E-bay etc for the tool free toppers. T bar, 5 or 7 star plastic heads.

"Knurled Thumb Nut Aluminum Alloy Hand Grip Knob Bolt" got my vote, insert the bolt with locknut glue and cut to the required length. Really nice finished bolt for less than $4 a pop.

If you need the measurements, I have a GSO spider I removed recently, if I can find the bolts and check I'll post again.


Steve
Ps. Going from agena specs, if you use the "Knurled... as above" in Ebay, you can find M5 Bolt cap with 12mm depth and a 20mm head, pack of 5 for $12 posted.

[mura_gadi]

Nut to attach spider to OTA for GSO Dobsonian or Newtonian telescope tubes. Usually used with GSO's 6", 8" and 10" reflectors. Part # FF240. Sold individually.

Specifications:

Total length = 13.3mm
Head length = 9.0mm
Shaft length = 4.3mm
Head diameter = 11.7mm
Female thread specification = M5 with 12mm thread length

[ha421]

[
Thanks Steve,
I looked at Agena site. The shipping cost of one nut to AU is over $40. But since it gives me the specifications I will follow your suggesgtions and start with Bunnings and the ebay site you recommended.
Of course if someone has them lying around .....that would be my 1st choice.
Many thanks Steve, appreciate your help.. Cheers

QUOTE=mura_gadi;1559343]Nut to attach spider to OTA for GSO Dobsonian or
Newtonian telescope tubes. Usually used with GSO's 6", 8" and 10" reflectors. Part # FF240. Sold individually.

Specifications:

Total length = 13.3mm
Head length = 9.0mm
Shaft length = 4.3mm
Head diameter = 11.7mm
Female thread specification = M5 with 12mm thread length[/QUOTE]