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#11
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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 |
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#12
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Tamper-resistant screws
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#13
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Tamper-resistant screws
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. |
#14
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Tamper-resistant screws
"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 |
#16
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Tamper-resistant screws
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. |
#17
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Tamper-resistant screws
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. |
#18
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Tamper-resistant screws
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 |
#19
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Tamper-resistant screws
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. |
#20
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Tamper-resistant screws
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 |
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