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Bolt on horns/ drver for 4 Pi's- What Bolts? [message #34785]

Thu, 17 January 2002 06:17

Garland
Messages: 269
Registered: May 2009

Grand Master

Is there a particular size bolt to use for the 2002 Eminence and the H290 horn?

Garland

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Re: Bolt on horns/ drver for 4 Pi's- What Bolts? [message #34794 is a reply to message #34785]

Thu, 17 January 2002 15:59

replay
Messages: 284
Registered: May 2009

Grand Master

hi garland, can't remember the size i used. i just took the driver with me into home depot and tried various bolts.

cheers,
george

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1/4"-20 x 3/4" [message #34795 is a reply to message #34785]

Thu, 17 January 2002 16:14

Wayne Parham
Messages: 18757
Registered: January 2001

Illuminati (33rd Degree)

The thread pattern used on the opposing pair of mounting holes is 1/4" diameter and has 20 threads per inch. The best length I've found is usually 3/4" because a 1/2" long bolt usually only "grabs" with one or two threads, if it reaches at all, and a 1" long bolt usually bottoms out. On some horns or adapters, you might need this long of a bolt, but then again, on many of them (like the H290), you have limited space to insert the bolt, so you must use a short bolt just to get it started.

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