Re: I need a bolt size
[Re: west]
#1467118
07/13/13 02:15 AM
07/13/13 02:15 AM
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Joined: Mar 2011
Posts: 1,655 Cut and Shoot, TX
kentj340
top fuel
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top fuel
Joined: Mar 2011
Posts: 1,655
Cut and Shoot, TX
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The AMK catalog is saying B and E bodies used 1/2-13, and my A uses 1/2-13 also, so I'd say try any 1/2-13 bolt and see if it works in your car thread-wise.
IIRC the A body needs a longer bolt than B and E because both the inboard and outboard sides of the box frame are threaded. If both are threaded on your car, check to see if the grip is slightly under 2-3/4. If so and the 1/2-13 is correct, then you need four grade 5.1 (or grade 5 will do) hex head machine screws with conical washers x 2-3/4. Use automotive grade 5 or 5.1, not hardware store grade 2. Length 2-1/2 might work if the grip including the washer is a few threads less than 2-1/2.
If you don't see two dolphins, you need a vacation.
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Re: I need a bolt size
[Re: Commando1]
#1467121
07/13/13 11:20 PM
07/13/13 11:20 PM
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Joined: Mar 2011
Posts: 1,655 Cut and Shoot, TX
kentj340
top fuel
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top fuel
Joined: Mar 2011
Posts: 1,655
Cut and Shoot, TX
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If your 1/2-13 female threads in the frame of your car are dirty, rusty, or damaged by weld spatter or whatever, you can file a vee in the first few threads of your bolts so that they are cutting like a tap. Make the side of the vee about 90 degrees to tangent in the clockwise turning direction for best cutting. Since the bolt is not nearly as hard as a tap, it won't cut as well as a tap, but usually well enough to get by. The original bolts had "paint cutter lead points" which do the same thing, as shown in the AMK catalog photos of the B and E body bumper arm bolts.
If you don't see two dolphins, you need a vacation.
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