what thread are these spikes?

[kernow]

DAYTON DSS4-BC BLACK CHROME SPEAKER SPIKES 4 PC SET
Part Number 240-715

Anyone know what thread these are? They appear to be metric rather than the common 1/4 20.

[cole]

I used these on my subwoofer. Im not sure exactly what you mean by the thread. But I can tell you that you have to drill a 5/16 hole, install a T-nut on the opposite side of the hole as the spike( included ), and then the spike screws into the T-nut.

[thehammer]

They are metric, appears to be an M6 with a 1mm thread pitch (coarse).

> DAYTON DSS4-BC BLACK CHROME SPEAKER SPIKES 4
> PC SET
> Part Number 240-715

> Anyone know what thread these are? They
> appear to be metric rather than the common
> 1/4 20.

[kernow]

> They are metric, appears to be an M6 with a
> 1mm thread pitch (coarse).

Thanks, I will try and track down a tap at the DIY store.

I am not using the T-nuts I have to tap directly into the base of my speakers which are 1/4" thick aluminum.

[cjd]

> Thanks, I will try and track down a tap at
> the DIY store.

At any rate, I got an M6-1 tap there.

Do you have access to the inside? An alternative is to pick up some M6-1 bolts in an appropriate length.

C

[kernow]

> At any rate, I got an M6-1 tap there.

> Do you have access to the inside? An
> alternative is to pick up some M6-1 bolts in
> an appropriate length.

> C
Yes, I have access to the inside, the crossover is mounted in this area but is well away from where the spikes are to be mounted. I will just have to unload the lead shot.