The Shop > Electronics & IC Programing

When M6 thread is funky on thermocouple

(1/2) > >>

PekkaNF:
So, when M6 is not standard M6.

Bought M6 thermocouple with PID controller. I made a fitting with standard M6x1 thread but the thermocouple would not fit in it.

OD is 6,22 mm and lead is 1,25 mm as close as thread gauge shows it. M6 bolt next to it on the picture.

Suggestions?

Pekka

philf:
Pekka,

Looks like 1/4" X 20 TPI (1.27mm pitch) Whitworth thread to me.

Phil.

PK:
I had exactly this problem the other day installing the T/Cs on our new reflow oven.  They are indeed 1/4"... Which is odd....

awemawson:
Could well be 1/4" X UNC if it's Chinese, which is very close to Whit but 60 degree rather than 55

PK:
I cant recall If I got UNC or BSW.. I just walked into the "Old peoples fasteners" section of the hardware store and grabbed a packet with 1/4" written on it....   :thumbup:

Navigation

[0] Message Index

[#] Next page