HELP requested with interpreting drawings specification 1

[mach221]

I came across the dimensional specifications I have not seen before (see the images below): Datum enclosed within an elongated hexagonal shape; a datum enclosed with an elongated hex. shape with surrounded by "=" signs; a datum surrounded by "=" signs (without the hex. shape). I would be grateful for advice on interpretation of these.

Many thanks.

 

[cowski]

The = signs appear to mean "symmetric about the centerline shown". I'm not sure about the hexes, perhaps an "inspection dimension" type callout?

Any clues in the title block?

 

[mach221]

Thank you. There are no clues in the title block; I think you may be right and the hexes are inspection / reporting dimensions.

 

[KENAT]

What, if any, drawing standard do the drawings claim to be in accordance with?

Posting guidelines faq731-376

http://eng-tips.com/market.cfm?

(probably not aimed specifically at you)
What is Engineering anyway: faq1088-1484​

 

[drawoh]

The = signs appear to mean "symmetric about the centerline shown". I'm not sure about the hexes, perhaps an "inspection dimension" type callout?

SolidWorks has a round ended box that flags the enclosed dimension as an inspection dimension. This conforms to no standard anyone here is aware of.

--
JHG

 

[CheckerHater]

Looks more like AutoCAD than SolidWorks:

http://docs.autodesk.com/ACD/2010/E...7a810d5ab4f18b-7eed.htm,topicNumber=d0e133048