Question 1

What is the difference between automotive and industrial air fittings....these indicate they are M fittings...exactly what are M fittings...

Accepted Answer

1/4" type V HVLP High Volume Low Pleasure fittings & connectors, they have a much larger hole which allows for more airflow so your tools will make more power than with the smaller type A or M that most people use. I recently replaced all my fittings in the shop because I had an assortment of all things air from 20-30 years of acquiring. The advantage of type V couplers is that you can use tools with type A & type M fittings along with the type V kind of a universal receiver however the reverse is not true, type V fittings WILL NOT work in type A or type M couplers. If you are using them for home shop, type M is fine the ones I have are working great form, fit, and function are great.

Question 2

are they made In USA?

Accepted Answer

I looked and cannot find a marking that indicates whether or not this is the case.   But, they are machined precisely and work well, which is the key thing.  Given the present attitude about mining, I'd guess the copper came from Chile, the zinc may or may not be from the US, and the steel is probably a US product.  If they can be made by extrusion and/or cold heading they are probably a US product.

Question 3

Are they still made in the usa?

Accepted Answer

Indeed they are, which is why it's my brand of choice.  Below is a link to their website for this product.http://www.miltonindustries.com/couplers-and-plugs/m-style/12-piece-m-style-coupler-kit.html

Question 4

Will the quick coupler fit on a Porter Cable PCFP02003 pancake compressor with 3/8 inch hose? Thanks

Accepted Answer

They worked on all my 3/8" hose connections as well as my compressor

ASIN	B005IUEC2O
Brand	Milton
Brand Name	Milton
Color	Brass
Colour	Brass
Connector Type	Plug
Connector type	Plug
Customer Reviews	4.8 out of 5 stars 1,593 Reviews
Exterior Finish	Brass
Global Trade Identification Number	00030937002105
Included Components	1 Milton Branded Product
Item Dimensions	11.7 x 10.2 x 3.8 centimeters
Item Type Name	Milton s-210 12 Piece M-Style Coupler Kit
Item Weight	0.1 Pounds
Item dimensions L x W x H	11.7 x 10.2 x 3.8 centimeters
Manufacturer	Milton
Material	Brass Alloy Steel
Material Type	Brass Alloy Steel
Model Number	S-210
Number of Pieces	12
Size	1/4 inch
Thread Size	0.25 inch
Thread Type	NPT
UPC	745332379003 030937002105
Unit Count	1 Count

Milton s-210 12 Piece M-Style Coupler Kit

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