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MG TD TF 1500 - COWL BRACKET BOLTS

What type bolts for windshield cowl brackets should I use for 1955 TF. Philips or strait edge?

Boris
B Gruzman

Boris,

TFs-'Philips Head',not slot.

Rob Grantham
TF3719("Aramis"),TF9177("Athos").
R GRANTHAM

Rob, Some of the phillips head screws I have seem to be polished stainless steel rather than chrome plated. Can you tell me what is original spec?
Max Irvine


Be careful with modern screws. The heads are wider than the original screws. When inserted they will be proud of the countersink holes. I believe The ones you get from Moss are close to original.

I purchased chrome plated ones fro McMasters ans re-machined the heads to fit.

I believe my old ones were Chrome plated steel.

Jim B
JA Benjamin

Thank you :)

Boris

B Gruzman

Hi Max,

From my experience,the bolts were originally steel,
not stainless.However,I seen original bolts that have lost their chrome surface looking more like stainless!

The originals have an overall length of 2 and 1/16 inches
(ie. including the head).The non threaded plain part of the shank is 15/16ths in length,whilst the threaded part of the shank is 1 and 1/32" in length.

The head size is approx.7/16ths in diameter.

The repros. are often incorrectly threaded the whole length of the shank.

Cheers
Rob Grantham
TF3719("Aramis"),TF9177("Athos").
R GRANTHAM

Rob, Just picked up on this thread and have a question. Are the threads on the repo windscreen bolts/screws the proper thread? I can live with the thread length being not the same if that's all we can get but not a change in thread from original. The Phillips heads are messed up on most of my screws, so re chroming is not an option. PJ
Paul S Jennings

The problem I see with most modern Phillips head screws is that they are really not Phillips head but Pozidriv screws. You can tell because of the extra X on the face and that the slots are bigger and rounder.

If you compare the original Phillips head screws with ones you get today there is a distinct difference. I see this everywhere from machine screws to wood screws. This includes the "reproductions" you get from our T suppliers.

If anyone has a real source for original style Phillips head screws I would like to know it.

More than you ever wanted to know about Phillips screws.
http://www.instructables.com/id/When-a-Phillips-is-not-a-Phillips/step13/Posidriv/
Chris Couper

I should have a pile of original steel c/plated Phillips bolts as we have fitted new on our restorations.

Must have a gather up and see what they are like. usually the cross head is damaged.

Chris is correct about the Pozi markings on reproductions.
Rod Brayshaw

Chris, that is a long standing complaint about repro parts. The "Phillips" replacement heads have all been pozidriv since at least the mid-80s. Besides not original, they are ugly up close. I asked Doug Pelton a few years ago if he would consider having correct screws made, but he was not interested at that time. All of the TD/TF windscreen frame/bracket, door handle and splash apron screws have this issue. George
George Butz

I remember while in the Navy, our aircraft had a screw that also was thought by some to be a Phillips, but it was a Reid & Prince. It had a sharper angle than the Phillips. The guys not privy to what is the correct tool to use, invariably would try to use a Phillips screw driver and bugger up the slots trying to torque it up, as the Phillips would not go in deep enough to create a good grip. The Pozidriv appears to a different breed of screw than the Reid & Prince also. PJ
Paul S Jennings

Paul: Follow the link I posted above. It goes into great detail what you described.

I find myself in need of ONE Phillips head screw for my side curtain brackets. I was able to cobble together a weird assortment of sizes and types but still have to use one Posidriv until I come across one more.

I was able to find enough clean finish machine screws for the windshield but do have some Posidriv's in the hidden places.
Chris Couper

Paul,

Yes! The threads of the more correct form(threaded and plain shank) repros are incorrect! I wonder why T Type supply companies go to all the trouble of manufacturing a bolt and not closing the deal with the correct thread.

Cheers
Rob Grantham
TF3719("Aramis"?),TF9177("Athos").
R GRANTHAM

Of all the tools I have and I have a bunch, I do not own a posidriv screw driver! I need to get a set.

And Rob, I totally agree, to take the time and effort to copy and manufacture an item in it's original form and then put the wrong threads on it makes no sense at all. Can't say it's entirely the manufactures fault, seeing how someone's telling them what to do. JMHO. PJ
Paul S Jennings

This thread was discussed between 17/04/2014 and 25/04/2014

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