Grip Screw thread size

5card · 12-09-2015, 06:08 PM

Anyone know the thread size for the grip screw I have to tough the hole in the grip frame.
Thanks 5card

Norme · 12-09-2015, 07:13 PM

It's a long obsolete Whitworth thread. A gunsmith who works on Lugers should have the correct tap.
Norm

Jim Solomon · 12-09-2015, 07:45 PM

Check back in 2011........"question on grip screw". A search should bring up the thread.
Jim

mrerick · 12-09-2015, 08:45 PM

The thread size for the grip retention screws on original German Luger pistols: 3/16" x 30 TPI Whitworth 55 degree threads.

http://forum.lugerforum.com/showthre...itworth+thread

5card · 12-10-2015, 11:27 AM

Jim thanks for the heads up, I read the posts looks like 3/16 32 worked for that fellow and I am going to give it s try,
Thanks again, 5card

DonVoigt · 12-10-2015, 01:25 PM

Ok,
so which is it? 30 tpi or 32 tpi? Whitworth understood.

Sonofeugene · 12-10-2015, 02:08 PM

The standard thread pitch for a Whitworth 3/16 fastener is 24. For a fine thread Whitworth in 3/16, it's 32.

FYI, just search "Whitworth thread fine" and you should be able to fine a chart.

mrerick · 12-10-2015, 08:27 PM

According to the drawings and documented in Sturgess' book, it's 30tpi. It is not a standard screw.

Marc

Sonofeugene · 12-13-2015, 07:04 PM

Weird if it is 30. I can understand a non-conventional thread when a design needs it, but for a grip screw? Makes zero sense.

Sonofeugene · 12-13-2015, 07:15 PM

Interesting posts here:

http://www.practicalmachinist.com/vb...screws-221376/

12-09-2015, 06:08 PM	#1
5card User Join Date: Jun 2002 Location: PA Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts	Grip Screw thread size Anyone know the thread size for the grip screw I have to tough the hole in the grip frame. Thanks 5card

12-09-2015, 07:45 PM	#3
Jim Solomon Lifer Lifetime Forum Patron Join Date: Nov 2012 Location: Georgia Posts: 199 Thanks: 700 Thanked 176 Times in 69 Posts	Check back in 2011........"question on grip screw". A search should bring up the thread. Jim __________________ Jim Solomon dent2@frontiernet.net

12-09-2015, 08:45 PM	#4
mrerick Super Moderator - Patron LugerForum Life Patron Join Date: Dec 2009 Location: Eastern North Carolina, USA Posts: 3,909 Thanks: 1,374 Thanked 3,110 Times in 1,510 Posts	The thread size for the grip retention screws on original German Luger pistols: 3/16" x 30 TPI Whitworth 55 degree threads. http://forum.lugerforum.com/showthre...itworth+thread __________________ Igitur si vis pacem, para bellum - - Therefore if you want peace, prepare for war.

12-10-2015, 01:25 PM	#6
DonVoigt User Join Date: Apr 2015 Location: near Charlotte NC Posts: 4,681 Thanks: 1,441 Thanked 4,350 Times in 2,040 Posts	Ok, so which is it? 30 tpi or 32 tpi? Whitworth understood. __________________ 03man(Don Voigt); Luger student and collector. Looking for DWM side plate: 69 ; Dreyse 1907 pistol K.S. Gendarmerie

12-10-2015, 08:27 PM	#8
mrerick Super Moderator - Patron LugerForum Life Patron Join Date: Dec 2009 Location: Eastern North Carolina, USA Posts: 3,909 Thanks: 1,374 Thanked 3,110 Times in 1,510 Posts	According to the drawings and documented in Sturgess' book, it's 30tpi. It is not a standard screw. Marc __________________ Igitur si vis pacem, para bellum - - Therefore if you want peace, prepare for war.

12-09-2015, 07:13 PM	#2
Norme Always A Lifetime Forum Patron Join Date: Jul 2009 Location: Colorado Posts: 2,417 Thanks: 226 Thanked 2,603 Times in 933 Posts	It's a long obsolete Whitworth thread. A gunsmith who works on Lugers should have the correct tap. Norm

12-10-2015, 11:27 AM	#5
5card User Join Date: Jun 2002 Location: PA Posts: 11 Thanks: 0 Thanked 0 Times in 0 Posts	Jim thanks for the heads up, I read the posts looks like 3/16 32 worked for that fellow and I am going to give it s try, Thanks again, 5card

12-10-2015, 02:08 PM	#7
Sonofeugene User Join Date: Oct 2013 Posts: 157 Thanks: 1 Thanked 118 Times in 64 Posts	The standard thread pitch for a Whitworth 3/16 fastener is 24. For a fine thread Whitworth in 3/16, it's 32. FYI, just search "Whitworth thread fine" and you should be able to fine a chart.

12-13-2015, 07:04 PM	#9
Sonofeugene User Join Date: Oct 2013 Posts: 157 Thanks: 1 Thanked 118 Times in 64 Posts	Weird if it is 30. I can understand a non-conventional thread when a design needs it, but for a grip screw? Makes zero sense.

12-13-2015, 07:15 PM	#10
Sonofeugene User Join Date: Oct 2013 Posts: 157 Thanks: 1 Thanked 118 Times in 64 Posts	Interesting posts here: http://www.practicalmachinist.com/vb...screws-221376/