Need Help!- G76 cycle for BSPT

[scorpionkeit]

Can anyone give me G76 2 line info for a 1 inch BSPT 16.8 Standard length
thanks

[g-codeguy]

Internal or external? Code will be the same format as for any thread. All you need to know is the OD (or ID) and root diameters.

EDIT: Are you saying you don't know the correct format?

[scorpionkeit]

External thread. Am fine with parallel thread just unsure of turned diameters and thread info for this thread.

[g-codeguy]

I've only made 3/4 and 1/2 inch Internal BSPP threads.

From Maryland Metrics Thread Data Charts for 1-11 BSPP/BSPF Class B:

Major Dia. 33.249/32.889 (1.3090/1.2948)
Pitch Dia. 31.770/31.410 (1.2508/1.2366)
Minor Dia 30.291 (1.1926)

That should do it for you.

[sinha_nsit]

For info about G76 in general, look at
Thread using g76 - Practical Machinist - Largest Manufacturing Technology Forum on the Web

Thread taper is same for both BSPT and NPT. So, R in the second block of G76 would be same.

[g-codeguy]

Oops. How did I see BSPP instead of BSPT? Sorry about that. I'll try to pay better attention next time.