Luger Grip Screw Thread Size

Zorba · 03-03-2017, 02:48 PM

Ok, I'm confused. I thought Whitworth was a British thing. Why would the Germans use it? Obviously, there's some factoid I'm missing...

Ron Wood · 03-03-2017, 04:38 PM

Quote:

Originally Posted by Zorba

Ok, I'm confused. I thought Whitworth was a British thing. Why would the Germans use it? Obviously, there's some factoid I'm missing...

At the time, the Brits were ahead of Germany in product standardization. The Whitworth thread was a documented industrial standard and Ludwig Loewe adopted that standard not only for grip screws but for barrel threads as well. Loewe also looked to the USA for standards for mass production as was initiated early on by Eli Whitney. Loewe wanted to produce quality and interchangeability so he wasn't reluctant to stand on the shoulders of those who had already been there, done that.
Ron

sheepherder · 03-03-2017, 11:13 PM

As described in my thread on this subject some time back, both a 3/16"-30 and a 3/16"-32 tap would thread holes that the three threads of a Luger grip screw would comfortably fit in.

The #10-32 would not go all the way in.

IMO having the correct size Whitworth tap is nice but not essential for only three threads.

From the Luger blueprints in TBLAP -

03-03-2017, 11:13 PM	#3
sheepherder Lifer Lifetime Forum Patron Join Date: Feb 2009 Location: ...on the 'ol Erie Canal... Posts: 8,197 Thanks: 1,416 Thanked 4,462 Times in 2,336 Posts	As described in my thread on this subject some time back, both a 3/16"-30 and a 3/16"-32 tap would thread holes that the three threads of a Luger grip screw would comfortably fit in. The #10-32 would not go all the way in. IMO having the correct size Whitworth tap is nice but not essential for only three threads. From the Luger blueprints in TBLAP - __________________ I like my coffee the way I like my women... ...Cold and bitter...

03-03-2017, 02:48 PM	#1
Zorba User Join Date: Feb 2013 Location: Merritt Island, Fl Posts: 952 Thanks: 777 Thanked 528 Times in 290 Posts	Ok, I'm confused. I thought Whitworth was a British thing. Why would the Germans use it? Obviously, there's some factoid I'm missing...