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76 Bonneville Gas Tank Center Nut Size?
#802629 03/24/20 4:57 pm
Joined: Jun 2016
Posts: 136
mrcarb Offline OP
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Could someone tell me the size of the center nut fastening the gas tank of a 76 Bonneville? Is a deep socket required?

Thank you

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Re: 76 Bonneville Gas Tank Center Nut Size?
mrcarb #802634 03/24/20 5:29 pm
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Originally Posted by mrcarb
Could someone tell me the size of the center nut fastening the gas tank of a 76 Bonneville?

The hexagon size should be 1/2".


Originally Posted by mrcarb
Is a deep socket required?

Preferably, if you have one (Edit; or normal socket and extension) but might not be absolutely necessary depending on how tight/corroded it is.

Last edited by L.A.B.; 03/24/20 5:34 pm.
Re: 76 Bonneville Gas Tank Center Nut Size?
mrcarb #802640 03/24/20 5:36 pm
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Glad you answered LAB. I didn’t want to walk out to the barn to check. I knew it was either a 1/2” or 9/16” but couldn’t remember off the top of my head. I used a deep well when I took mine off but could’ve got by with a regular socket n extension. I would recommend a 6 point socket because if it’s stuck a 12 point might slip. Mine’s a 77. Hope you get it n make sure you put that rubber plug back as that’s what kept mine from rusting. Gene

Re: 76 Bonneville Gas Tank Center Nut Size?
mrcarb #802643 03/24/20 5:57 pm
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Hi Mrcarb, Point brought up of rust on this bolt is a good one.
Very common for it to rust solid & very hard to remove.

I recommend putting boat trailer grease on threads, both bolt & nut. Regular grease is better than nothing. Antiseize works but I’ve found it can effect lock but holding more than grease. I’ve never had nut back off with grease.

Putting washer & nut on screw driver & tip of screwdriver on bolt & let them slide onto bolt. Nut will balance on bolt. Then use socket to start nut.

Don’t over tighten nut. Washer tight to spacer tube can be too tight.
Don


1973 Tiger 750

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