Tamper-resistant screws

On 10/31/2008 8:27 AM SMS wrote:

Phillip Farber wrote:
There's a lot of parts theft in my town. Disk brake calipers, seat
posts, seats, handlebars, stems, etc. They all have this in common:
5mm or 6mm Allen head screws.

I have been looking far and wide for a source of small quantities of
stainless steel M5 and M6 Allen or Torx screws with a security pin so
you have to have a hollow tool to fit the screw. The Allen with the
secutiry pin look sort of like this from the top:

-------
/ \
/ O \
\ /
\ /
------

Can anyone point me to a source? There are lots of distributors but
you have to buy a quantity and I don't want to spend $100 for a box of
screws.

Try "http://www.tamper-pruf-screws.com/"

They don't list a minimum quantity, but they also don't have prices on-line.

Doesn't look they have any socket head cap screws. Pan or button heads
might work, but I'd check to make sure that the head diameter isn't too
great to fit into the counterbore where the old cap heads formerly lived.

--
Mike "Rocket J Squirrel"
Bend, Oregon

On 10/31/2008 10:31 AM wrote:

On Oct 31, 11:27 am, SMS wrote:
Phillip Farber wrote:
There's a lot of parts theft in my town. Disk brake calipers, seat
posts, seats, handlebars, stems, etc. They all have this in common:
5mm or 6mm Allen head screws.
I have been looking far and wide for a source of small quantities of
stainless steel M5 and M6 Allen or Torx screws with a security pin so
you have to have a hollow tool to fit the screw. The Allen with the
secutiry pin look sort of like this from the top:
-------
/ \
/ O \
\ /
\ /
------
Can anyone point me to a source? There are lots of distributors but
you have to buy a quantity and I don't want to spend $100 for a box of
screws.
Try "http://www.tamper-pruf-screws.com/"

They don't list a minimum quantity, but they also don't have prices on-line.- Hide quoted text -

- Show quoted text -

how about using robinson screws ?

Robertson screws? Square drive? Are they even available in metric machine
threads?

--
Mike "Rocket J Squirrel"
Bend, Oregon

On Fri, 31 Oct 2008 10:33:44 -0700, Mike Rocket J Squirrel wrote:

On 10/31/2008 8:27 AM SMS wrote:

Phillip Farber wrote:
There's a lot of parts theft in my town. Disk brake calipers, seat
posts, seats, handlebars, stems, etc. They all have this in common:
5mm or 6mm Allen head screws.

I have been looking far and wide for a source of small quantities of
stainless steel M5 and M6 Allen or Torx screws with a security pin so
you have to have a hollow tool to fit the screw. The Allen with the
secutiry pin look sort of like this from the top:

-------
/ \
/ O \
\ /
\ /
------

Can anyone point me to a source? There are lots of distributors but
you have to buy a quantity and I don't want to spend $100 for a box of
screws.

Try "http://www.tamper-pruf-screws.com/"

They don't list a minimum quantity, but they also don't have prices
on-line.

Doesn't look they have any socket head cap screws. Pan or button heads
might work, but I'd check to make sure that the head diameter isn't too
great to fit into the counterbore where the old cap heads formerly
lived.

if you want tamper resistance to have a chance of being effective, you
need button heads.

"Phillip Farber" wrote in message
...
On Oct 30, 9:08 pm, Mike Rocket J Squirrel
wrote:
On 10/30/2008 5:46 PM Martin Riddle wrote:



"Phillip Farber" wrote in message
...
| There's a lot of parts theft in my town. Disk brake calipers, seat
| posts, seats, handlebars, stems, etc. They all have this in
common:
| 5mm or 6mm Allen head screws.
|
| I have been looking far and wide for a source of small quantities
of
| stainless steel M5 and M6 Allen or Torx screws with a security pin
so
| you have to have a hollow tool to fit the screw. The Allen with
the
| secutiry pin look sort of like this from the top:
|
| -------
| / \
| / O \
| \ /
| \ /
| ------
|
| Can anyone point me to a source? There are lots of distributors
but
| you have to buy a quantity and I don't want to spend $100 for a
box of
| screws.
|
| Thanks,
|
| Phil
|
|
|

try McMaster. A lot of the little guys have vanished so I always
find
what I'm looking for atwww.mcmaster.com.

Cheers

I think the combination of tamper-resistance + metric + stainless will
overload McMaster's catalog.

Pretty awesome site but you're right. Tamper-resistance + metric +
stainless is one constraint too many. How about bike shops that are
online? I know this must be a problem that shop are addressing.
Maybe some have gotten quantities from distributors for ther
customers?


--
Mike "Rocket J Squirrel"
Bend, Oregon

I tried "tamperproof socket cap screws" and found a bunch, SS too.

Cheers

On Sat, 01 Nov 2008 00:53:25 +0000, Martin Riddle wrote:

"Phillip Farber" wrote in message
...
On Oct 30, 9:08 pm, Mike Rocket J Squirrel
wrote:
On 10/30/2008 5:46 PM Martin Riddle wrote:



"Phillip Farber" wrote in message
news:64236b4e-f425-4a39-af55-
...
| There's a lot of parts theft in my town. Disk brake calipers, seat
| posts, seats, handlebars, stems, etc. They all have this in common:
| 5mm or 6mm Allen head screws.
|
| I have been looking far and wide for a source of small quantities
of
| stainless steel M5 and M6 Allen or Torx screws with a security pin
so
| you have to have a hollow tool to fit the screw. The Allen with the
| secutiry pin look sort of like this from the top: |
| -------
| / \
| / O \
| \ /
| \ /
| ------
|
| Can anyone point me to a source? There are lots of distributors but
| you have to buy a quantity and I don't want to spend $100 for a box
of
| screws.
|
| Thanks,
|
| Phil
|
|
|

try McMaster. A lot of the little guys have vanished so I always find
what I'm looking for atwww.mcmaster.com.

Cheers

I think the combination of tamper-resistance + metric + stainless will
overload McMaster's catalog.

Pretty awesome site but you're right. Tamper-resistance + metric +
stainless is one constraint too many. How about bike shops that are
online? I know this must be a problem that shop are addressing. Maybe
some have gotten quantities from distributors for ther customers?


--
Mike "Rocket J Squirrel"
Bend, Oregon

I tried "tamperproof socket cap screws" and found a bunch, SS too.

Cheers


look for torx sockets, not hex - more commonly used for tamper-resistance.

On Oct 30, 6:50*pm, Phillip Farber wrote:
There's a lot of parts theft in my town. *Disk brake calipers, seat
posts, seats, handlebars, stems, etc. *They all have this in common:
5mm or 6mm Allen head screws.


If this bike is dialed in the obvious solution is to either just epoxy
the bolt heads smooth with JB Weld or to drill out the bolts so tools
are useless. Either way, if you really need to remove them, it's
fairly easy to just slot them with a grinding disc so you can use a
flat blade screwdriver.

On Oct 31, 12:52*pm, Mike Rocket J Squirrel
wrote:
On 10/31/2008 10:31 AM wrote:





On Oct 31, 11:27 am, SMS wrote:
Phillip Farber wrote:
There's a lot of parts theft in my town. *Disk brake calipers, seat
posts, seats, handlebars, stems, etc. *They all have this in common:
5mm or 6mm Allen head screws.
I have been looking far and wide for a source of small quantities of
stainless steel M5 and M6 Allen or Torx screws with a security pin so
you have to have a hollow tool to fit the screw. *The Allen with the
secutiry pin look sort of like this from the top:
* * *-------
* */ * * * * \
*/ * * *O * * \
*\ * * * * * * /
* *\ * * * * /
* * *------
Can anyone point me to a source? *There are lots of distributors but
you have to buy a quantity and I don't want to spend $100 for a box of
screws.
Try "http://www.tamper-pruf-screws.com/"

They don't list a minimum quantity, but they also don't have prices on-line.- Hide quoted text -

- Show quoted text -

how about using robinson screws ?

Robertson screws? Square drive? Are they even available in metric machine
threads?

--
Mike "Rocket J Squirrel"
Bend, Oregon

http://en.wikipedia.org/wiki/Robertson_screwdriver

^- The wikipedia link has a nice sidebar of esoteric screw types.

jim beam wrote:

Mike Rocket J Squirrel wrote:

Doesn't look they have any socket head cap screws. Pan or button heads
might work, but I'd check to make sure that the head diameter isn't too
great to fit into the counterbore where the old cap heads formerly
lived.

if you want tamper resistance to have a chance of being effective, you
need button heads.

What difference would that make, if the head is sunk in a
counterbore?

Chalo

On Sat, 01 Nov 2008 01:23:10 -0700, Chalo wrote:

jim beam wrote:

Mike Rocket J Squirrel wrote:

Doesn't look they have any socket head cap screws. Pan or button
heads might work, but I'd check to make sure that the head diameter
isn't too great to fit into the counterbore where the old cap heads
formerly lived.

if you want tamper resistance to have a chance of being effective, you
need button heads.

What difference would that make, if the head is sunk in a counterbore?

Chalo


have you ever seen a bike brake disk that's counterbored? or seat post
clamp? or... bottom line, it doesn't if the head /is/ fully sunk, but
few are.

On Nov 1, 6:40*am, jim beam wrote:
On Sat, 01 Nov 2008 01:23:10 -0700, Chalo wrote:
jim beam wrote:

Mike Rocket J Squirrel wrote:

Doesn't look they have any socket head cap screws. Pan or button
heads might work, but I'd check to make sure that the head diameter
isn't too great to fit into the counterbore where the old cap heads
formerly lived.

if you want tamper resistance to have a chance of being effective, you
need button heads.

What difference would that make, if the head is sunk in a counterbore?

Chalo

have you ever seen a bike brake disk that's counterbored?

I doubt that people are unbolting and stealing brake disks -- this
requires you to remove the wheel, which, why not just steal the wheel?
Disk brake caliper mounts are often counterbored.

*or seat post
clamp?

Uh, yeah, the one on my bike right now. Bog standard OEM Kona seat
post clamp. Google image search "seat clamp" for lots and lots of
other examples.

*or... *bottom line, it doesn't if the head /is/ fully sunk, but
few are.

I think Chalo was needling you, more subtly than others might, about
your tendency to go off half cocked without actually paying attention
to the question. You are correct that in non-counterbored applications
a button head is more secure, but this was a useless response to
someone specifically asking about a counterbored screwhole, in which a
button head will not fit.

-pm