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NAS 523 fastener code
- Thread starter Dunny
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- #2
Dunny,
I just read through the standard, and saw nothing regarding a square in the upper left (northwest) quad. I have seen (on occasion) a square in the upper right (northeast) quad to separate the -(dash) no (dia) from the mfr head location. The only literature (not the standard - fr another book) I found regarding this practice is that the square is to represend an "installation" fastener.
Wes C.
------------------------------
When they broke open molecules, they found they were only stuffed with atoms. But when they broke open atoms, they found them stuffed with explosions...
I just read through the standard, and saw nothing regarding a square in the upper left (northwest) quad. I have seen (on occasion) a square in the upper right (northeast) quad to separate the -(dash) no (dia) from the mfr head location. The only literature (not the standard - fr another book) I found regarding this practice is that the square is to represend an "installation" fastener.
Wes C.
------------------------------
When they broke open molecules, they found they were only stuffed with atoms. But when they broke open atoms, they found them stuffed with explosions...
SuperStress
Aerospace
Boeing uses the box in the NW quadrant to indicate a fluid tight installation. I'm not sure if that's standard throughout the industry or not.
SuperStress
SuperStress
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