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Unknown Security Fastener Screw - which Version is this (similar to System ZERO) ?
Unknown Security Fastener Screw - which Version is this (similar to System ZERO) ?
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Old 24th November 2021, 01:11 PM   #1
tiefbassuebertr is offline tiefbassuebertr  Germany
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Default Unknown Security Fastener Screw - which Version is this (similar to System ZERO) ?

Explanation of "SYSTEM ZERO" is here:
https://docs.rs-online.com/aaa3/0900766b80b458f2.pdf

I am looking for the right naming of the screws from image No 1-3 so as the suited bit from image No 4 (on left).
Image No 5 shows a slightly variation of this kind of screw (also on left).

System ZERO looks like the images No 6-8 (screwdriver-kit, bit and screw)

Such an screwdriver-kit I want to have for the screws showed in image No 1-3.

Thank you for an information.
Attached Images
File Type: jpg Unknown Screw-1.jpg (461.6 KB, 118 views)
File Type: jpg Unknown Screw-2.jpg (566.2 KB, 116 views)
File Type: jpg Unknown Screw-3.jpg (503.5 KB, 115 views)
File Type: jpg appropriate bit for image 1-3.jpg (3.8 KB, 115 views)
File Type: jpg Unknown screw different - on left.jpg (30.0 KB, 116 views)
File Type: jpg System Zero Screwdriver kit.jpg (31.5 KB, 41 views)
File Type: jpg System Zero DLH4-125 bit.jpg (122.9 KB, 27 views)
File Type: jpg system zero screw.jpg (41.1 KB, 30 views)

Last edited by tiefbassuebertr; 24th November 2021 at 01:16 PM.
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Old 24th November 2021, 01:17 PM   #2
Turbowatch2 is offline Turbowatch2  Germany
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I came across such "screw's" too, they were simply a kind of plastic nails. Not made to be taken out without any damage to the case.
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Old 24th November 2021, 01:50 PM   #3
Indiglo is offline Indiglo  Australia
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It could be a T-Groove (also known as tri-groove) tamper proof screw ?
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Old 24th November 2021, 04:28 PM   #4
mickeymoose is offline mickeymoose  Canada
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Search for "security screw head", all shall be revealed. E
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Old 24th November 2021, 04:44 PM   #5
NareshBrd is offline NareshBrd  India
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RS catalog 1998 had such security screws.
Special drivers / sockets needed.
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Old 24th November 2021, 05:25 PM   #6
simon7000 is offline simon7000  United States
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Try this link , scroll down a bit on the left side.

McMaster-Carr
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Old 25th November 2021, 09:41 AM   #7
tiefbassuebertr is offline tiefbassuebertr  Germany
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Quote:
Originally Posted by mickeymoose View Post
Search for "security screw head", all shall be revealed. E
Quote:
Originally Posted by Indiglo View Post
It could be a T-Groove (also known as tri-groove) tamper proof screw ?
Thank you for both information.
All versions on the web are according image No 5 from post #1 - go to
M8-1.25 T-Groove Tamper Proof Security Nuts x 4 & Tool Socket Stainless Tri 8mm | eBay
TGroove, Tri-Groove, Tampruf - Loss Prevention Fasteners
T-Groove Button Machine Screw - Tamperproof Security Fasteners | SUPERFASTENER
Maybe the screws in question are special small versions of those with very small outer diameter of necessary nut driver socket due to the deep countersinking of the screw head.

Last edited by tiefbassuebertr; 25th November 2021 at 09:43 AM.
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