need some of these what are they called???

Try Camec Pty Ltd......

Here ya go >>

Clamping knobs, Star knobs etc...

Not in Perth, but it'll give ya an idea of what's available...

Pretty sure Bunnings has a selection of the tri-lobe knobs.. may be more, but I haven't checked in a while...


:)

Looks a lot like the knobs that hold a UHF onto its bracket.

You could try McNaughtons ,Artia ,UES ,Robinson agencies
All In Malaga in the Northern suburbs One of them will have them
Norm

You can also find them in the RS catalog. They have a counter in Osborne Park to look it up & order some - yours looks like a metric thread. If you quoted the thread type / size & length I can look it up and post the item # tomorrow or you can look up the online catalog of RS, under the fastener section (I think) and chase the number & price from there.
They have a minimum quantity, maybe 5 or 10 for that item.

Try Whitworths (www.whitworths.com.au), looks like a canopy thumb screw to me.

GraGra

They are called Handwheels and are available from Flexliner in WA here is a link to their catalog showing both metric and imperial

Handwheel catalog in WA

Excellent company I have used. Ask for their catalog anyway lots of good things included

Thanks to all of you...this site always comes up trumps!

In the theatrical lighting business they are known at tri-wheels.
almost any decent theatrical lighting suppier will have them in 3/8 ww and perhaps 5/16 and 1/4

Last time a checked, Cliff Electronics had a plastic knob that would take either an 8mm or a 5/16 heax bolt of choice or a nut.....drop thebolt or nut in and snap on the cap

Some of the engneering places have a selection.

Carbatec, a woodworking supplier with branches in all capitol cities except Darwin has a wide selection.

as has been said places like Camec, Ovesco and some of the cabinet makers supplies have them.

worst comes to worst buy some threaded rod and wing nuts.....brase the wing nuts on the threaded rod.......these will last longer than any plastic.

Or if you are a wood turner.....turn a knob of the desired shape and epoxy in threded rod.

cheers

Hi if you have a canvas guy near you that makes canopies or anything like that try them first . I get mine from them . Way cheaper than retail .