Pietti 1851 Navy .44 nipple thread size?

bigminnow · August 20, 2011, 10:29 PM

Pietti 1851 Navy .44 nipple thread size??? What is the thread size on these nipples? M6X75?? I assume it will be metric being made overseas...but the manual that came with it doesn't say. Thanks for the help!

bigminnow · August 20, 2011, 10:46 PM

Well...I saw on one website that older Italian might be M6X.75 and newer Italian might be M5.5X9... I could look for a tap and see if it fits but both of these seem to be odd sizes...
Any suggestions? Thanks...

American Eagle · August 20, 2011, 11:19 PM

That's a good question. I am curious myself as to what the answer is.

mykeal · August 21, 2011, 05:42 AM

M6x0.75. Nothing odd about it, that's a very common metric thread.

There is no metric thread standard for M5.5x0.9; it's actually SAE 12x28.

Doc Hoy · August 21, 2011, 05:58 AM

....there had to be something odd about it, it would be that it is National Fine rather than National Course.

Go to Home Depot and buy a number 12 screw and you get National Course.

Howard31 · August 21, 2011, 06:46 AM

I had the same problem with my Piettas 60's,58 and Starr. The Nipples would go in or out very difficult right from the start to the finish. Hard enough that I thought they were crossed. I read some where online ,possibly this forum, that Pietta uses a die and tap that is not finished. Exactly what that means I don't know, maybe slightly under size or perhaps a little rougher finish to make threads a bit tighter to prevent loosening. I got a tap and die set from a place in Brooklyn ,did all my nipples and cylinders and never had another problem.
My piettas are less than 5 years old and the thread size is 6x75

bigminnow · August 21, 2011, 08:20 PM

That's good to know that the newer Piettas are 6X.75. I wanted to order some better nipples and there was no info listed on which size to get. I ordered the 6X.75.
Someone else mentioned that most walk-in hardware stores have the 6X1 tap but they had to special order the 6X.75.
Thanks again...

August 20, 2011, 10:29 PM	#1
bigminnow Member Join Date: August 12, 2011 Posts: 98	Pietti 1851 Navy .44 nipple thread size? Pietti 1851 Navy .44 nipple thread size??? What is the thread size on these nipples? M6X75?? I assume it will be metric being made overseas...but the manual that came with it doesn't say. Thanks for the help!

August 20, 2011, 11:19 PM	#3
American Eagle Senior Member Join Date: March 20, 2009 Location: Florida, USA Posts: 265	That's a good question. I am curious myself as to what the answer is. __________________ I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them. ----THOMAS JEFFERSON Last edited by American Eagle; August 20, 2011 at 11:29 PM.

August 21, 2011, 05:58 AM	#5
Doc Hoy Senior Member Join Date: October 24, 2008 Location: Naples, Fl Posts: 5,440	If... ....there had to be something odd about it, it would be that it is National Fine rather than National Course. Go to Home Depot and buy a number 12 screw and you get National Course. __________________ Seek truth. Relax. Take a breath.

August 21, 2011, 06:46 AM	#6
Howard31 Senior Member Join Date: December 6, 2009 Location: Hudson Valley,NY Posts: 231	Nipples I had the same problem with my Piettas 60's,58 and Starr. The Nipples would go in or out very difficult right from the start to the finish. Hard enough that I thought they were crossed. I read some where online ,possibly this forum, that Pietta uses a die and tap that is not finished. Exactly what that means I don't know, maybe slightly under size or perhaps a little rougher finish to make threads a bit tighter to prevent loosening. I got a tap and die set from a place in Brooklyn ,did all my nipples and cylinders and never had another problem. My piettas are less than 5 years old and the thread size is 6x75

August 20, 2011, 10:46 PM	#2
bigminnow Member Join Date: August 12, 2011 Posts: 98	Well...I saw on one website that older Italian might be M6X.75 and newer Italian might be M5.5X9... I could look for a tap and see if it fits but both of these seem to be odd sizes... Any suggestions? Thanks...

August 21, 2011, 05:42 AM	#4
mykeal Senior Member Join Date: October 8, 2006 Location: Northern Michigan Posts: 2,772	M6x0.75. Nothing odd about it, that's a very common metric thread. There is no metric thread standard for M5.5x0.9; it's actually SAE 12x28.

August 21, 2011, 08:20 PM	#7
bigminnow Member Join Date: August 12, 2011 Posts: 98	That's good to know that the newer Piettas are 6X.75. I wanted to order some better nipples and there was no info listed on which size to get. I ordered the 6X.75. Someone else mentioned that most walk-in hardware stores have the 6X1 tap but they had to special order the 6X.75. Thanks again...