[Milsurplus] [Army-Radios] German fasteners, screwdriver slot

[Glenn Little WB4UIV]

See

https://en.wikipedia.org/wiki/List_of_screw_drives#Pozidriv

Pozidriv screws have a set of radial indentations (tick marks) set at 
45° from the main cross recess on the head of the screw.

The dot appears to indicate a JIS B 1012.
This standard appears to only be available for sale, not be internet.
I have not found a document that indicates the meaning of the dot.
I have found a screw head with a dot to always be metric.
I have JIS and JCIS drivers.
I have found that a Phillips driver fits the screw head with a dot 
better than a JIS driver.

The JCIS screws are camera screws.

One of my past jobs was Chief Engineer at a TV station where one of my 
duties was repairing TV cameras.
Maryland Metrics was the company that enlightened me to JIS and SCIS 
drivers.
My source for these drivers has been Moody Tools, not cheap, but, when I 
broke a driver, they replaced it quickly with no questions asked.

73
Glenn
WB4UIV



On 2/12/2021 5:29 PM, Dean Davidson via Milsurplus wrote:
> 
> 
> On 13/02/2021 07:45, Nick England wrote:
>> https://www.hagerty.com/media/maintenance-and-tech/that-phillips-head-screw-isnt-what-you-think-it-is/ 
>> <https://www.hagerty.com/media/maintenance-and-tech/that-phillips-head-screw-isnt-what-you-think-it-is/> 
>>
>>
> That is very wrong!!!
> What he thinks is JIS is in fact Pozidive
> an entirely different thing
> Pozidrive is always identified by a dot
> 
> True JIS screws are very similar to Phillips
> 
> Dean Davidson
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-- 
-----------------------------------------------------------------------
Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI, FRA, NRA-LM    ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"