Fixing Polycarb Screens

[Chassis 33]

Folks what are you using to fix polycarb screens to curved cars? I'd imagine nylon bolts would work fine on the Wedges, but are they up to the job on Tuscans and the like or are steel bolts and decent washers required?

Regards
Iain

[450Nick]

Mine had about 30 M4 steel bolts all the way around the windscreen. I've bought some stainless ones to replace it with as they shouldn't take too much stress and then they'll hopefully stay shiney!

[TVRleigh_BBWR]

I have M4 dome head stainless bolts holding my side windows in with nylocks, as they look a lot nicer than rivets, and they was not that expensive.

[Chassis 33]

BTW Leigh on the subject of windows, are you going to sort your rear air brake in time for Brands

Regards
Iain

[Keithyboy]

Domed allen headed bolt screwed into a captive nut arrangement set in the screen surround.

[TVRleigh_BBWR]

Chassis 33 said:

BTW Leigh on the subject of windows, are you going to sort your rear air brake in time for Brands

Regards
Iain

Lol yes, not sure why it's started to do that, as it's been like that since Kevan had it.

[NTEL]

Mine is held in place with stainless M4 countersunk head set screws, stainless cups, stainless washers, and stainless nyloks. Important to use nyloks as ordinary nuts just unwind themselves!!

[teamHOLDENracing]

Countersunk bolts are the way ahead chaps (the ones with the hex socket) - I find they spread the load better than a normal bolt and are less likely to split the poly carb, especially when you are very close to the edge. They are also neater as you can mount them flush so won't foul wipers, polishing cloths etc - and more aerodynamic (like that'll make a difference ). I use floating captive nuts riveted to the back of the surround so one person can bolt the thing in and out - less of an issue on an open top, or if you have 12 foot long arms. I use a mixture of M5 and M6.

I'd like to have joined you at Brands but unfortunately I'm already committed this weekend....

[Chassis 33]

Andy, dear chap, you should have been committed year ago! I like the idea of countersunk but was a little dubious about them spreading the load well, but it sounds like you've not had problems. I'm most concerned about the front screen as the others are relatively flat, guess I prep everything then wait for the next stinkingly hot day over the summer to fit it.

Regards
Iain

[TVRSH]

And I'm using M6 dome-head SS bolts on the curved Griff screen + plastic washers to spread the load with SS washers and nuts inside. Guess its a case of "horses for courses".
See you Sat/Sun Iain with the Lexan Marguard screens!

[teamHOLDENracing]

Just wait until Uncle Reidy asks you to put a different windscreen sticker over your dome heads

The Sag has a very curved screen, much more so than the Tuscan. I've not had a hole crack through to the edge since I did the first screen with countersunk holes in 2007.

And yes I probably should be committed - I even use black permanent marker on the ones in the black surround....

[OSR]

teamHOLDENracing said:

And yes I probably should be committed - I even use black permanent marker on the ones in the black surround....

That's not a completely nuts thing to do. A mate of mine paints his with matt black model enamel paint as it stops the sun reflecting off the ones holding his dash in place and blinding him with glare. I thought he was being far too OCD when he got the pot of Humbrol out until he explained why