can someone post a pic of the bob tail screws ?? be good for a measurement to??
cant find mine and need to find replacements for chateau
thanks...
bob tail screws
Started by
meanmachine72
, Jul 08 2013 10:26 AM
16 replies to this topic
#1
meanmachine72
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Posted 08 July 2013 - 10:26 AM
#2
GTR-1
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Posted 21 July 2013 - 12:17 PM
I got these screws when I bought my spoiler from Brad Merick. He said they were New Old Stock.
Overall length: 18mm
Diameter of head: 8mm
screw.JPG 117.75K
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screw 1.JPG 102.99K
12 downloads
#3
grumpy xu1
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Posted 21 July 2013 - 01:30 PM
Should actually read 3/4 x 5/16 on box don't forget. & yes they look acurate to me, note the countersunk with button head style. Gary.
#4
meanmachine72
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Posted 21 July 2013 - 01:37 PM
thanks very much for your time mate...
wonder if brad still has some more left??
if not I will source some else were
cheers johnno
wonder if brad still has some more left??
if not I will source some else were
cheers johnno
#5
_1973bathxu1_
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Posted 21 July 2013 - 01:39 PM
hi there not the right ones although close i screwed 1 out this morning from my xu1s thats never been touched as i need 4 screws for 1 of my xu1s
any way the length is 16mm the head is 8 mm and almost flat head and the phillips x has no semi circles between them and the end of the screw has no point its also flat
if anyone wants a photo of it i can send it on phone only
i hope this helps u
regards aldo
#6
Bazza
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ǝɹnʇxıɟ ɯnɹoɟ
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Posted 21 July 2013 - 03:31 PM
Hi all
Definitely an unusual/little used screw. SP2155 - the only reference that I can find anywhere is in relation to the XU-1 rear spoiler.
Cheers
Bazza
#7
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Posted 21 July 2013 - 05:31 PM
Should actually read 3/4 x 5/16 on box don't forget. & yes they look acurate to me, note the countersunk with button head style. Gary.
Hi Gary
They are not a button head screw. They are Philips Pan Head counter sunk.
Cheers
Dave.
#8
grumpy xu1
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Posted 22 July 2013 - 11:05 PM
Dave, probably correct i just remembered 1 company at least calling them button, but yes usually panhead i'd go with that mate. & 16mm would mean actually 5/8 with a mm missing x 5/16 round before Dave corrects me 
thanks mate Gary.
#9
goxu1
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Posted 23 July 2013 - 12:07 PM
The machinery's handbook list this type of head as "oval csk head"
#10
_les_
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Posted 23 July 2013 - 05:13 PM
The GMH description I found is Oval head No.8 - 18 x 5/8" Black it does not mention if it is Phillips head , it is not in the self tapper section of the book but the machine bolt section so I would say it is not a self tapper, but that does not sound correct
Les
Les
#11
crabba67
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Posted 25 July 2013 - 10:53 PM
Hi all,original screw.
cheers
#12
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Posted 12 October 2023 - 06:07 AM
Old thread but I need some help. The 4 holes in the back of my spoiler are about 10mm . 8mm screws seem way to small. Have my holes been damaged to be that diameter. Any help would be appreciated. Thanks Ian.
#13
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Posted 12 October 2023 - 06:51 AM
Old thread but I need some help. The 4 holes in the back of my spoiler are about 10mm . 8mm screws seem way to small. Have my holes been damaged to be that diameter. Any help would be appreciated. Thanks Ian.
Sounds like the heads of the screws have been pulled right through the fibreglass.
#14
IanC
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Posted 12 October 2023 - 07:31 AM
I was afraid of that. Is there any way of dealing with this problem?. Again any ideas would be greatly appreciated.
#15
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Posted 12 October 2023 - 08:22 AM
I was afraid of that. Is there any way of dealing with this problem?. Again any ideas would be greatly appreciated.
Ian if you look inside the spoiler there should be a thicker pad in the fibreglass around each screw hole.
They are basically separate rectangular pieces of fibreglass that have been glassed onto the back of the spoiler to strengthen the fixing point and allow thickness for the countersunk screw heads.
If you are unable to replace these yourself then perhaps talk to a fibreglass product manufacturer/repairer.
#16
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Posted 12 October 2023 - 08:38 AM
From memory the holes were a good bit bigger than the screws.
That was so the spoiler could be moved around a bit to actually get it to fit.
If the holes were smaller you ended up scratching the paint trying to fit them.
Cheers
Rob
#17
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Posted 12 October 2023 - 08:38 AM
Ian if you look inside the spoiler there should be a thicker pad in the fibreglass around each screw hole. Thanks Dave, I will look into that.
They are basically separate rectangular pieces of fibreglass that have been glassed onto the back of the spoiler to strengthen the fixing point and allow thickness for the countersunk screw heads.
If you are unable to replace these yourself then perhaps talk to a fibreglass product manufacturer/repairer.
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