Reply
 
Thread Tools Search this Thread
 
Old 04 May 2006, 11:58   #1
Member
 
Country: UK - England
Town: I.O.W/Bristol
Boat name: HotShot
Make: shakey
Length: 5m +
Engine: 70hp Tohatsu
Join Date: Jul 2003
Posts: 1,543
SS self tappers for console

Very soon I'm going to need a load of stainless self tappers and penny washers to screw my console down with. I have a couple of questions:

1. What size do I need? Is it good/bad practise to have the screw penetrating the under side of the deck? My deck is 18mm ply + 1 mm ish of glass and the screw needs to go through the flange and the washer. What diam (across the threads) would be suitable?

2. Where is a good place to get them from? I have been in contact with www.rapoole.com and they can supply them but charge 10 postage and I would end up buying 100 which I won't need.

Many thanks.

Tim

EDIT: And I know I have to be careful not to screw through the deck and hull!
__________________

__________________
slimtim is offline   Reply With Quote
Old 04 May 2006, 12:06   #2
ADS
Member
 
Country: UK - England
Town: Dorset
Length: 4m +
Join Date: Oct 2003
Posts: 1,410
Not sure about the screws Tim, but my console pulled out after abit of enthusiastic ribbing off the needles
When I refitted it I used larger diameter screws but I also stuck it down with a type of silkaflex called 'Prostick', apparently this is the product to use, and the console never moved after that.
__________________

__________________
ADS is offline   Reply With Quote
Old 04 May 2006, 12:59   #3
Member
 
Country: UK - England
Town: London
Boat name: varies
Make: n/a
Length: n/a
Engine: varies
Join Date: May 2004
Posts: 128
Personally, I dislike selftappers on boats as if at all possible I like the reassurance of a nut/bolt holding things down (or preferably welded!). But, the Prostick tip may be a good un. I remeber customising a 17ft Fletcher dory to an open workboat configuration. They would only supply it with a huge console, which we promptly removed. Took out all of the self tappers and then needed a winch to unstick it from the deck. They had used one of these marine sealents/glues and it obviously provided the main strength of to the whole assembly. I'd do a bit of research in that direction, as it definitely is strong!

cheers,

t
__________________
Tideway is offline   Reply With Quote
Old 04 May 2006, 13:04   #4
Member
 
stevetheboat's Avatar
 
Country: UK - England
Town: Worcestershire
Make: Various
Engine: O/B + Sterndrives Di
Join Date: Dec 2003
Posts: 243
Tim you require Size 8 or 10 x 3/4 A4 selftapping screws and a dollop of sealant/adhesive like Sikaflex 292 - this should prove more than adequate to hold everything down.

For the fasteners try Kevin @
A2A4 Fixings Ltd.
29 Church Street
Shirley
Southampton
SO15 5LG
Tel 02380 785320
email kev@a2a4.co.uk

www.a2a4.co.uk

The self tappers are mainly there to apply equal pressure over the flange areas whilst the adhesive cures, but add a little "belt & braces" to the installation.
__________________
www.nautequipe.co.uk
stevetheboat is offline   Reply With Quote
Old 04 May 2006, 13:05   #5
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Remember Aston Martin - Lotus and Airbus are all bonded these days!!!
__________________
codprawn is offline   Reply With Quote
Old 04 May 2006, 16:25   #6
Member
 
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,961
Tim, you need to find the fattest you can and then get the screws one size thinner and also get a few of the fattest ones. You need to drill the correct sized pilot hole too. I know that sounds odd but if/when you strip a thread you've still got the fatter screw to save the day.

Unfortunately, I don't agree with stevetheboat on the length of the screws. By the time the screw has passed through the washer and the consol, at " (19mm) you'll only have a few millimetres of screw doing the holding.

Although it pierces the deck, I'd go straight through. (Anything under the deck?) The length needs to be; washer, flange, deck and a bit to spare cos the tapered end of the screw does nuffin.

I do agree with the other folk that it's essential to use a sealer around the flange and skooshed down each screw hole. I've found good silicon sealer is more that adequate. However, a wee warning if you choose to use it; it is very slippery and will seriously lubricate the pilot hole and it is then VERY easy to overtighten the screws and strip the thread.

All from experience. I didn't google a thing.
__________________
JW.
jwalker is offline   Reply With Quote
Old 04 May 2006, 17:38   #7
Member
 
Country: UK - England
Town: I.O.W/Bristol
Boat name: HotShot
Make: shakey
Length: 5m +
Engine: 70hp Tohatsu
Join Date: Jul 2003
Posts: 1,543
right thanks for the tips guys.

Steve, I will give kev a call as I couldn't find what I needed on his website. I think as JW suggested use longer screws as I think my flange and washer will be 8-9mm.

I've found this shop:

http://www.marine-hardware.co.uk/aca...__A4__393.html

Which have what I want but seem to want to charge 11 postage to the IOW...really hacks me off that does.
__________________
slimtim is offline   Reply With Quote
Old 04 May 2006, 19:46   #8
Member
 
Country: UK - Wales
Town: Southampton
Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
Length: 8m +
Engine: Cat3126 Yam 90 &70
MMSI: 42
Join Date: Dec 2003
Posts: 6,556
I am not a lover of self tappers but if you promise to use the glue then you can try a2 a4 as Steve suggested or Screwfix would reduce your postage costs .

I have loads of SS self tappers and penny washers in the workshop , which all came from either of those two outlets. Penny washers cost about 10 p from a2/a4 now theres inflation for you
__________________
Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
Pullin' me back to you - Deja Voodoo
Rogue Wave is offline   Reply With Quote
Old 05 May 2006, 05:57   #9
Member
 
Country: UK - England
Town: Southampton
Boat name: SMH Rib / War Shot
Make: Ribtec / Scorpion
Length: 4m +
Engine: 10hp Yam / 150hp opt
Join Date: Sep 2003
Posts: 1,894
RIBase
Sikaflex

Hi Tim when I removed the bench seat from tha back of my boat most of the screws had pulled out and disappeared. All that was holding the seat down was the sikaflex on the flange.

So sikaflex all round the flange and screws at 100mm spacing. It'll never come off!
__________________
Searider is offline   Reply With Quote
Old 05 May 2006, 06:45   #10
Member
 
Country: UK - England
Town: southampton
Boat name: magic
Make: coastline 7.2
Length: 7m +
Engine: inboard diesel
Join Date: May 2006
Posts: 1
self tappers

hi best place i use for a4 self tappers is baseline in fareham (segensworth) they stock lots of a4 and a2 stainless fittings and fastners, they do a mail order service , tell them you are a trade customer and you will get the discount all the local boat builders get. I agree with the 100mm spacing i used inch a4 10 s with a2 screw caps to match. Make sure you put it down with sika flex, it definitly wont go anywhere then. Hope this helps, here is the link to their web site http://www.baselinehardware.co.uk/ or phone 01489 576349, they were the cheapest i found when looking a year ago, and have used them since.
__________________

__________________
phil_bed is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 19:27.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.