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oscar225
Senior Member Joined: 03 Nov 2018 Location: Devon Status: Offline Points: 204 |
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Posted: 09 Mar 2019 at 07:37 |
Silly question i know but has anybody any idea of the size of the 2 small machine screws inside the headlight bucket which secure the distribution panel beneath the fusebox, the heads of mine are completely destroyed and nothing in my "small screw box" seems to fit
thanks Chris
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iansoady
Senior Member Joined: 23 Jul 2017 Location: Redditch Status: Offline Points: 2402 |
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No, but there's no such thing as a silly question...... Two of the most useful tools I have are a digital caliper (cost around £10) and a screw gauge (£5 or so). With these you can identify any odd screw. Nuts are a bit more awkward..... Or even cheaper: |
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Ian
1952 Norton ES2 1986 Honda XBR500 1958-ish Greeves/Triumph in progress |
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Dave P.
Senior Member Joined: 12 Jan 2015 Location: Northants Status: Offline Points: 5573 |
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I think they are M3 if memory serves,or perhaps m4.I'll have a butchers later.
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TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.
1971 V7 Special. 1972 850GT. 1970 T120 Bonnie. 2009 500 Bullet. |
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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But when you don't have the screws, just the holes they go in to, it becomes less simple. I think I could guarantee it's an M something thread, but that won't help. However, a measuring calliper and thread gauge are very useful tools.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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Amboman
Senior Member Joined: 05 Dec 2015 Location: Maryland, USA Status: Offline Points: 383 |
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I can measure some later today if needed.
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Charlie
'69 Ambassador,'71 Ambassador,'73 Eldorado,'75 Eldorado police,'76 Convert,'77 Morini 3 1/2 Strada,'81 Ducati 500SL Pantah http://www.AntietamClassicCycle.com |
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iansoady
Senior Member Joined: 23 Jul 2017 Location: Redditch Status: Offline Points: 2402 |
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I think Oscar said the heads were mashed uo which implies he has the screws.....
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Ian
1952 Norton ES2 1986 Honda XBR500 1958-ish Greeves/Triumph in progress |
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oscar225
Senior Member Joined: 03 Nov 2018 Location: Devon Status: Offline Points: 204 |
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hi guys thanks for the replies i have measured the screws and they are a smidge over 3mm therefore M3 i assume, will look online and try to source some, thanks again Chris
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Amboman
Senior Member Joined: 05 Dec 2015 Location: Maryland, USA Status: Offline Points: 383 |
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Just measured mine as well. A little over 3 mm as you say. Threads doesn't seem to be Metric - 0.6 isn't exact, but 40 TPI is. Almost seems like a 5-40 screw. Weird.
In case anyone ever needs it, the screws that secure the fuse block are M4-0.7 x 15, with a split lock and 11 mm o.d. flat washer on each.
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Charlie
'69 Ambassador,'71 Ambassador,'73 Eldorado,'75 Eldorado police,'76 Convert,'77 Morini 3 1/2 Strada,'81 Ducati 500SL Pantah http://www.AntietamClassicCycle.com |
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Dave P.
Senior Member Joined: 12 Jan 2015 Location: Northants Status: Offline Points: 5573 |
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Like Charlie, I've also had a look at these screws.What I found was that an M3 nut will not go onto the screw and an M3 screw will not screw into the relevant hole.Very strange.So, it aint an M3.Did the Italians have an equivalent to our BA sizes specifically for small electrical parts? Maybe.
Edited by Dave P. - 09 Mar 2019 at 17:30 |
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TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.
1971 V7 Special. 1972 850GT. 1970 T120 Bonnie. 2009 500 Bullet. |
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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They also sourced parts from outside Europe, which could account for a non metric thread.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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Dave P.
Senior Member Joined: 12 Jan 2015 Location: Northants Status: Offline Points: 5573 |
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I have just read that on some bicycles of Italian manufacture they used fasteners which had metric diameters and SAE threads.
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TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.
1971 V7 Special. 1972 850GT. 1970 T120 Bonnie. 2009 500 Bullet. |
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jpc
Senior Member Joined: 06 Oct 2016 Location: Belgium Status: Offline Points: 651 |
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Are you sure it's not M 3.5 ?
That's a standard metric with its own pitch (0.6).
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Amboman
Senior Member Joined: 05 Dec 2015 Location: Maryland, USA Status: Offline Points: 383 |
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Like I posted above, it doesn't seem to be a metric pitch - 0.6 isn't a perfect fit, but 40 tpi is.
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Charlie
'69 Ambassador,'71 Ambassador,'73 Eldorado,'75 Eldorado police,'76 Convert,'77 Morini 3 1/2 Strada,'81 Ducati 500SL Pantah http://www.AntietamClassicCycle.com |
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