The Ford Barn - View Single Post - GAV needle threads... unique to this component?

JoeCB · 08-10-2020, 10:31 AM

Picking up on what Katy said ...the now obsolete ASME thread standards had number size screws from # 2 (.0842) to #30 (.4526) with many optional thread pitches. Unfortunately there were several sizes that are deceivingly close to the common "inch" sizes. Three of the worst that can cause BIG trouble are #12 (.216), #14 (.242), and #16 (.268) , these came in pitches , 16, 18 , 20 , and 24 tpi.

Joe B

08-10-2020, 10:31 AM	#18
JoeCB Senior Member Join Date: Nov 2018 Location: Farmington MI Posts: 284	Re: GAV needle threads... unique to this component? Picking up on what Katy said ...the now obsolete ASME thread standards had number size screws from # 2 (.0842) to #30 (.4526) with many optional thread pitches. Unfortunately there were several sizes that are deceivingly close to the common "inch" sizes. Three of the worst that can cause BIG trouble are #12 (.216), #14 (.242), and #16 (.268) , these came in pitches , 16, 18 , 20 , and 24 tpi. Joe B