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bolt size brackets headlamp
Posted: Mon May 08, 2023 6:01 pm
by mathias1
Hi,
Does anyone know the correct thread to bolt the nose cone (and also the headlamp brackets) tot the tombstone?
Re: bolt size brackets headlamp
Posted: Mon May 08, 2023 6:08 pm
by Emiel
My guess is 5/16 unc and I’m 99,98% sure I’m right.
Re: bolt size brackets headlamp
Posted: Mon May 08, 2023 10:39 pm
by Billy26F5
In the parts books the std. parts section says the following for 20310-S7/8, the part no. of the bolt in question: 5/16"-18x1/2"hex. head bolt cadmium and zinc plated. The ones that go through the side channels as well are 20346-S7/8: 5/16"-18x3/4"hex. head bolt cadmium and zinc plated. Probably UNC but it doesn't give any details on that.
Sandy
Re: bolt size brackets headlamp
Posted: Mon May 08, 2023 10:45 pm
by Emiel
5/16-18 is unc.
Re: bolt size brackets headlamp
Posted: Tue May 09, 2023 12:15 am
by Billy26F5
It could also be BSW (Whitworth) but it's unlikely on a Ford product.
Sandy
Re: bolt size brackets headlamp
Posted: Wed May 10, 2023 6:28 pm
by mathias1
thanks both. should be UNC on a fordson. Just didn't find the size in my parts book. sometimes it's really difficult to find some parts in there
Re: bolt size brackets headlamp
Posted: Mon May 29, 2023 10:07 pm
by mathias1
Billy26F5 wrote: ↑Mon May 08, 2023 10:39 pm
In the parts books the std. parts section says the following for 20310-S7/8, the part no. of the bolt in question: 5/16"-18x1/2"hex. head bolt cadmium and zinc plated. The ones that go through the side channels as well are 20346-S7/8: 5/16"-18x3/4"hex. head bolt cadmium and zinc plated. Probably UNC but it doesn't give any details on that.
Sandy
HI Sandy,
on which page or drawing did you find this?
Re: bolt size brackets headlamp
Posted: Tue May 30, 2023 12:14 am
by Billy26F5
That's in the 1965 parts book in the FFCN (the fourth in the Major section), near the end.
Sandy
Re: bolt size brackets headlamp
Posted: Fri Dec 01, 2023 11:51 am
by LakeLox
Just replaced mine this week, 5/16 UNC was fine, ran a tap down to clean up the rust in the threads first
Re: bolt size brackets headlamp
Posted: Fri Dec 01, 2023 10:50 pm
by mathias1
LakeLox wrote: ↑Fri Dec 01, 2023 11:51 am
Just replaced mine this week, 5/16 UNC was fine, ran a tap down to clean up the rust in the threads first
yeah I ordered some unc taps to clean it up. One bolt was sheared off, so I used the welder to weld a nut on. It did get out with ease.
I have the headlamps in the grills, and I found out the 1/2 length bolts are not long enough. the 5/16 - 3/4 bolts were just fine.
Re: bolt size brackets headlamp
Posted: Fri Dec 01, 2023 11:05 pm
by LakeLox
I was going to say I used 3/4” long bolts, but the two on the ends around the corners could be 1” if you wanted to, the holes are deeper and the side rails are on top of those holes. A couple of the holes on the front go all the way through so the tap will clean them up nice. Those ones could be longer too to get the purchase under the headlight bracket!!